CN107169213A - Method, device and system for testing functional indicators of zero-sequence current adaptive protection device - Google Patents

Abstract

The invention relates to a method for testing a function index of a zero sequence current self-adaptive protection device, which comprises the following steps: initializing a power distribution network networking model in a real-time digital simulator according to actual operation information of the multi-loop power distribution network; obtaining a current fault condition according to the fault occurrence model; controlling a real-time digital simulator to perform power distribution network simulation under the current fault condition to obtain a first current-voltage analog signal of the power distribution network; acquiring a zero-sequence current compensation value and a digital control signal which are output by the zero-sequence current adaptive protection device according to the first current-voltage analog signal; adjusting a power distribution network networking model, and controlling the real-time digital simulator to perform power distribution network simulation again to obtain a second current-voltage analog signal of the power distribution network; and determining the function index of the device according to the fault condition, the zero sequence current compensation value and the first and second current and voltage analog signals. The invention can comprehensively test the functional indexes of the zero-sequence current self-adaptive protection device and has low test cost.

Description

Method, device and system for testing functional indicators of zero-sequence current adaptive protection device

technical field

The invention relates to the field of power system simulation, in particular to a method, device, system, storage medium and computer equipment for testing the function index of a zero-sequence current self-adaptive protection device.

Background technique

In a three-phase four-wire circuit, the vector sum of the three-phase currents is equal to zero. If a current transformer is connected to the three-phase three-wire system, the induced current is zero at this time. When an electric shock or leakage fault occurs in the circuit, leakage current flows in the circuit, and the phasor sum of the three-phase current passing through the current transformer is not equal to zero. In this way, there is an induced current in the secondary coil of the current transformer. This current is added to the electronic amplifier circuit of the detection part, and compared with the predetermined operating current value of the protection zone device, if it is greater than the predetermined operating current, the sensitive relay will be activated. The current transformer connected here is called a zero-sequence current transformer. The phasor sum of the three-phase current is not equal to zero, and the generated current is the zero-sequence current.

In power system, zero-sequence current protection is an important grounding protection method. The zero-sequence current adaptive protection device can be used to deal with multi-circuit complex ground faults in the same phase in the small-resistance grounding system. The setting value of the adaptive zero-sequence current protection can vary with the ground fault type, system operation mode, and distribution of grounded neutral points And change. When selecting the zero-sequence current adaptive protection device, it is necessary to evaluate the various functions of the zero-sequence current adaptive protection device, and test the applicability of the zero-sequence current adaptive protection device under different working conditions of the small resistance grounding system. The traditional assessment method uses on-site testing, but this assessment method is costly to implement; and because the on-site test cannot simulate some complex working conditions, such as developing faults in the small resistance grounding system, multi-circuit faults, etc., it cannot fully evaluate zero-sequence faults. Performance of current adaptive protective devices.

Contents of the invention

Based on this, the embodiments of the present invention provide a method, device, system, storage medium and computer equipment for testing the functional indicators of the zero-sequence current adaptive protection device, which can comprehensively test the functional indicators of the zero-sequence current adaptive protection device, and the test cost is low.

On the one hand, the present invention provides a method for testing the function index of the zero-sequence current adaptive protection device, including:

Initialize the pre-established distribution network model in the real-time digital simulator according to the actual operation information of the multi-circuit distribution network grounded with small resistance;

According to the fault occurrence model corresponding to the distribution network networking model in the real-time digital simulator, the current fault condition is obtained;

Based on the current distribution network network model, control the real-time digital simulator to simulate the multi-circuit distribution network under the current fault condition, and obtain the first current and voltage analog signal of the multi-circuit distribution network;

Sending the first current and voltage analog signal to the zero-sequence current adaptive protection device to be tested; obtaining the zero-sequence current compensation value and digital value output by the zero-sequence current adaptive protection device according to the first current and voltage analog signal control signal;

According to the digital control signal, the distribution network network model is adjusted, and based on the adjusted distribution network network model, the real-time digital simulator is controlled to re-simulate the multi-circuit distribution network to obtain the multi-circuit distribution network. a second current and voltage analog signal;

According to the fault condition, the current compensation value, the first current-voltage analog signal and the second current-voltage analog signal, the function index of the zero-sequence current adaptive protection device is determined.

A device for testing the functional indicators of a zero-sequence current adaptive protection device, comprising:

The initialization module is used to initialize the pre-established distribution network network model in the real-time digital simulator according to the actual operation information of the multi-circuit distribution network grounded with small resistance;

The fault condition generation module is used to obtain the current fault condition according to the fault occurrence model corresponding to the distribution network networking model in the real-time digital simulator;

The primary simulation module is used to control the real-time digital simulator to simulate the multi-circuit distribution network under the current fault condition based on the current distribution network network model, and obtain the first current and voltage analog signal of the multi-circuit distribution network;

A device information acquisition module, configured to transmit the first current and voltage analog signal to the zero-sequence current adaptive protection device to be tested; and obtain the output of the zero-sequence current adaptive protection device according to the first current and voltage analog signal Zero-sequence current compensation value and digital control signal;

The secondary simulation module is used to adjust the distribution network networking model according to the digital control signal, and based on the adjusted distribution network networking model, control the real-time digital emulator to re-simulate the multi-circuit distribution network to obtain The second current and voltage analog signal of the multi-circuit distribution network;

And, an index determining module, configured to determine the functional index of the zero-sequence current adaptive protection device according to the fault condition, the current compensation value, the first current-voltage analog signal and the second current-voltage analog signal.

A system for testing the functional indicators of a zero-sequence current adaptive protection device, including: a real-time digital simulator, a power amplifier, and a zero-sequence current adaptive protection device to be tested; a distribution network network is established in the real-time digital simulator model and its corresponding fault occurrence model;

The analog signal output interface of the real-time digital emulator is connected to the input interface of the power amplifier, and the output interface of the power amplifier is connected to the analog signal input interface of the zero-sequence current adaptive protection device to be tested; the digital signal input of the real-time digital emulator The interface is connected to the digital signal output interface of the zero-sequence current adaptive protection device;

The real-time digital simulator outputs the first current and voltage analog signal of the multi-circuit distribution network under the current fault condition obtained based on the simulation of the distribution network networking model and the fault occurrence model to the power amplifier; through the power amplifier, the first current The voltage analog signal is amplified, and the amplified analog signal is output to the zero-sequence current adaptive protection device; the zero-sequence current adaptive protection device outputs a corresponding digital control signal to a real-time digital simulator; the zero-sequence current is automatically The adaptive protection device also outputs the zero-sequence current compensation value under the current fault condition;

The real-time digital simulator adjusts the distribution network network model according to the digital control signal output by the zero-sequence current adaptive protection device, and re-simulates the multi-line distribution network based on the adjusted distribution network network model, and obtains multiple the second current and voltage analog signal of the loop distribution network;

According to the fault condition simulated in the real-time digital simulator, the zero-sequence current compensation value output by the zero-sequence current adaptive protection device, and the first current voltage analog signal and the second current simulated by the real-time digital simulator The voltage analog signal is used to determine the functional index of the zero-sequence current adaptive protection device.

A computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the above-mentioned method are realized.

A computer device includes a memory, a processor, and a computer program stored in the memory and operable on the processor, and the processor implements the steps of the above-mentioned method when executing the program.

The above technical solution is based on the real-time digital simulator to simulate various working conditions of the production site of the multi-circuit distribution network, so that the relevant functional indicators of the zero-sequence current adaptive protection device can be fully detected, and no actual wiring modification of the substation is required. , can reduce the experimental site and save the test cost.

Description of drawings

Fig. 1 is the schematic flowchart of the method for testing the function index of zero-sequence current self-adaptive protective device of an embodiment;

Fig. 2 is a schematic diagram of a distribution network networking model of an embodiment;

Fig. 3 is a schematic diagram of a fault occurrence model of an embodiment;

Fig. 4 is the application environment diagram of the method for testing the function index of zero-sequence current self-adaptive protective device of an embodiment;

Fig. 5 is a flowchart of a method for testing the function index of the zero-sequence current adaptive protection device in the application scenario of Fig. 4;

Fig. 6 is a schematic structural diagram of a device for testing the functional indicators of a zero-sequence current adaptive protection device according to an embodiment.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Fig. 1 is the schematic flowchart of the method for testing the function index of zero-sequence current adaptive protection device of an embodiment; As shown in Fig. 1, the method for testing the function index of zero-sequence current adaptive protection device in the present embodiment comprises steps :

S11. Initialize the pre-established distribution network network model in the real-time digital simulator according to the actual operation information of the small-resistance grounded multi-circuit distribution network.

Among them, the distribution network networking model can reflect the networking information of the small-resistance grounded multi-circuit distribution network, including networking structure information, component status and/or parameter information, and the like.

S12. Obtain the current fault condition according to the fault occurrence model corresponding to the distribution network networking model in the real-time digital simulator.

In an optional embodiment, it also includes the steps of establishing a distribution network networking model in a real-time digital simulator in advance, and establishing a fault occurrence model corresponding to the distribution network networking model. Among them, the fault occurrence model is associated with the distribution network networking model. By setting the model parameters of the fault occurrence model, the distribution network networking model can be adjusted to simulate the effect of the corresponding multi-circuit distribution network working conditions.

Preferably, the fault conditions include: fault location, fault occurrence time, number of fault lines, transition resistance, grounding initial angle and/or intermittent time, etc. Through the pre-established distribution network network model and fault occurrence model in the real-time digital simulator, a variety of different fault conditions can be simulated, and then the functional indicators of the zero-sequence current adaptive protection device under different fault conditions can be tested .

S13. Based on the current distribution network networking model, control the real-time digital simulator to simulate the multi-circuit distribution network under the current fault condition, and obtain the first current and voltage analog signal of the multi-circuit distribution network.

Real-time digital simulator RTDS (Real Time Digital Simulator), based on digital processors and parallel computing, can realize real-time output. At the same time, it uses a gigabit processor card to greatly reduce the simulation step size to 20 microseconds, and the response can be accurate to 9kHz . RTDS is based on the distribution network model, which can fully simulate the transient state of the power grid system in a laboratory environment.

S14, sending the first current and voltage analog signal to the zero-sequence current adaptive protection device to be tested; obtaining the zero-sequence current compensation value output by the zero-sequence current adaptive protection device according to the first current and voltage analog signal and digital control signals.

S15. Adjust the distribution network network model according to the digital control signal, and based on the adjusted distribution network network model, control the real-time digital simulator to re-simulate the multi-circuit distribution network to obtain the multi-circuit distribution network The second current and voltage analog signal of the grid.

S16. Determine a function index of the zero-sequence current adaptive protection device according to the fault condition, the current compensation value, the first current-voltage analog signal, and the second current-voltage analog signal.

Because the real-time digital simulator RTDS can not only be connected with the actual zero-sequence current adaptive protection device to form a flexible and convenient closed-loop circuit, but also can simulate various complex and severe working conditions that are difficult to realize or not allowed in the actual power system simulation. Therefore, connecting the RTDS to the zero-sequence current adaptive protection device for simulation testing will effectively make up for the shortcomings of traditional on-site testing. It can not only fully test the functional indicators of the device, but also save testing costs.

In an optional embodiment, the distribution network networking model may include: a main network model, a transformer model, a grounding transformer model, a small resistance model, an overhead line model and/or a load model, and the like. Preferably, as shown in FIG. 2 , the main network model adopts an ideal voltage source, the transformer model adopts a three-phase double-winding transformer model, the grounding transformer model adopts a Z-type grounding transformer model, and the overhead line model adopts a centralized parameter line model.

In an optional embodiment, as shown in FIG. 3 , in the real-time digital simulator, corresponding electrical data extraction models, zero-sequence current compensation models, electrical data processing models and/or result display models can also be pre-established. Among them, the electrical data extraction model is used to extract relevant electrical data from the fault occurrence model, including zero-sequence voltage and zero-sequence current; the electrical data processing model is used to process the extracted fault occurrence parameters accordingly to obtain the current fault condition ; The zero-sequence current compensation model is used to adaptively correct the zero-sequence current of each faulty line in real time to the zero-sequence current value of the single fault of the line when a multi-line fault occurs; the results show that the model is used to correct the current The fault conditions and the zero-sequence current and zero-sequence voltage under the above fault conditions are output and displayed. In addition, the result display model is also used to output and display the simulation results of the real-time digital simulation of the multi-circuit distribution network, for example, to output and display the first current and voltage analog signal and the second current and voltage analog signal. Preferably, the fault occurrence model adopts a single-phase ground fault, and the fault time, transition resistance, intermittent ground fault and fixed grounding initial angle can be set; the result display model presents relevant information in the form of tables and/or curves.

In an optional embodiment, the above step S16 specifically includes: according to the fault condition, the current compensation value, the first current and voltage analog signal and the second current and voltage analog signal, determining the zero sequence current adaptive protection device. Sequence current adaptive protection action time index, zero-sequence current adaptive value index and/or zero-sequence current compensation effect index. For example:

The zero-sequence current adaptive protection action time index can be obtained according to the time difference between the time when the zero-sequence current adaptive protection device sends out the digital control signal and the time when the fault occurs; the zero-sequence current adaptive value can be obtained according to the current compensation value; the zero-sequence current compensation The effect can be obtained according to the difference between the current compensation value and the zero-sequence current in the first current-voltage analog signal; in addition, by comparing and analyzing the first current-voltage analog signal and the second current-voltage analog signal, it can be judged whether the fault has been resolved. After the release, it is determined that the protection action of the zero-sequence current adaptive protection device is reliable.

It can be understood that the method for testing the zero-sequence current adaptive protection device in the above embodiment is applicable to the functional index test of the adaptive zero-sequence three-stage overcurrent protection device and the functional index of the adaptive zero-sequence inverse time overcurrent protection device Test and/or the functional index test of the adaptive zero-sequence post-acceleration protection device, in addition, it is also applicable to the functional index test of the conventional three-stage overcurrent protection device.

Fig. 4 is a specific application scene diagram of the method for testing the function index of the zero-sequence current adaptive protection device according to an embodiment of the present invention. As shown in Fig. 4, the application scene is: the RTDS and the zero-sequence current adaptive The protection device is connected through a power amplifier to form a closed-loop test platform. The test platform can realize the relevant function test of the zero-sequence current adaptive protection device under different fault conditions. In RTDS, the primary system (distribution network networking model) and secondary system (including fault occurrence model, electrical data extraction model, zero-sequence current compensation model, electrical Data processing model, result display model), RTDS can realize real-time simulation and test operation of multi-line distribution network based on the above-mentioned primary system and secondary system. Among them, the fault occurrence model adopts single-phase ground fault, and the fault time, transition resistance, intermittent ground fault and fixed ground initial angle can be set; the zero-sequence current compensation model adaptively converts each fault line to The zero-sequence current of the real-time correction is the zero-sequence current value when the loop is faulty alone.

Wherein, based on the primary system and the secondary system, the step of simulating various fault conditions of the multi-circuit distribution network includes: by connecting the corresponding line in the distribution network model to the fault occurrence model, simulating the corresponding fault location ;By adjusting the fault time parameters of the fault occurrence model, simulate the corresponding fault occurrence time; by connecting several lines in the distribution network model with the fault occurrence sub-module, simulate the corresponding number of fault lines; by adjusting the fault occurrence model The transition resistance parameter in the model simulates the corresponding transition resistance; by adjusting the fixed grounding initial angle in the fault occurrence model, the corresponding grounding initial angle is simulated; by adjusting the time parameter of the intermittent ground fault in the fault occurrence model, the corresponding fault intermittent sex time. Namely: the fault location is realized by connecting different lines with the fault occurrence module; the fault time can be randomly set in the fault occurrence model, and any one or several faults can occur simultaneously at any time; the number of fault lines can be determined by combining several circuits with The connection of the fault occurrence module is realized; the transition resistance is realized by changing the transition resistance parameter in the fault occurrence model; the grounding initial angle is set by the fixed grounding initial angle setting model, and the intermittent time is set by the intermittent ground fault.

The analog signal output interface of the real-time digital emulator is connected to the input interface of the power amplifier, and the output interface of the power amplifier is connected to the analog signal input interface of the zero-sequence current adaptive protection device to be tested; the digital signal input of the real-time digital emulator The interface is connected to the digital signal output interface of the zero-sequence current adaptive protection device.

Based on the above test platform, the functional test of the zero-sequence current adaptive protection device under different fault conditions can be realized, including different fault locations, different fault times, different numbers of fault lines, different transition resistances, different grounding initial angles and Fault conditions of varying intermittent times. Correspondingly, based on the above test platform, relevant functional tests of the zero-sequence current adaptive protection device can be carried out, including: zero-sequence current adaptive protection action time index, zero-sequence current adaptive value index and/or zero-sequence current compensation effect index Wait. Through the RTDS comprehensive, complete and real simulation of the transient state of the power grid system, and can return the action signal of the zero-sequence current adaptive protection device to form a closed-loop test, it can not only be used to evaluate the operation of the zero-sequence current adaptive protection device, but also can be used To evaluate the response of the distribution network to the normal operation or misoperation of the zero-sequence current adaptive protection device. The method for testing the function index of the zero-sequence current adaptive protection device of the above-mentioned embodiment is further explained below with reference to FIG. 4 and FIG. 5 .

As shown in FIG. 5, the method for testing the functional index of the zero-sequence current adaptive protection device in this embodiment includes steps:

(1) According to the actual operation information of the small-resistance grounded multi-circuit distribution network, set the system parameters once; that is, initialize the pre-established distribution network network model in the real-time digital simulator.

(2) According to the actual test requirements, set up the secondary system in the real-time digital simulator to form different fault conditions.

(3) RTDS performs real-time digital simulation according to the settings of the primary system and the secondary system, and outputs the simulation result of the multi-circuit distribution network under the current fault condition, that is, the first current and voltage analog signal; it is amplified by the power amplifier and then transmitted The zero-sequence current adaptive protection device to be tested.

(4) The zero-sequence current adaptive protection device calculates the zero-sequence current compensation value through arithmetic processing according to the current-voltage analog signal (that is, the amplified analog signal of the first current-voltage analog signal) imported by the power amplifier, and sends out Digital control signal, passed to RTDS.

The RTDS adjusts the distribution network networking model in the RTDS according to the digital control signal, specifically, for example, adjusts the state of a circuit breaker in the distribution network networking model according to the digital control signal.

(5) RTDS performs real-time simulation to obtain the second current and voltage analog signals of the multi-circuit distribution network. The secondary system extracts and records the voltage and current values before and after the fault treatment (the first current and voltage analog signal before the fault treatment, and the second current and voltage analog signal after the fault treatment). According to the fault condition, the current compensation value, the first current-voltage analog signal and the second current-voltage analog signal, after processing, the relevant function indicators of the zero-sequence current adaptive protection device are output through the result display model, including: zero-sequence current Adaptive protection action time index, zero-sequence current adaptive value index and/or zero-sequence current compensation effect index, etc.

It should be noted that the above test platform is not only suitable for the functional index test of the adaptive zero-sequence three-stage overcurrent protection device, the functional index test of the adaptive zero-sequence inverse time overcurrent protection device and/or the adaptive zero-sequence post- The functional index test of the acceleration protection device is also applicable to the functional index test of the conventional three-stage overcurrent protection device.

It should be noted that for the foregoing method embodiments, for the sake of simplicity of description, they are expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because Certain steps may be performed in other orders or simultaneously in accordance with the present invention.

Based on the same idea as the method for testing the functional indicators of the zero-sequence current adaptive protection device in the above-mentioned embodiments, the present invention also provides a system for testing the functional indicators of the zero-sequence current adaptive protection device, including: a real-time digital simulator, a power amplifier and A zero-sequence current adaptive protection device to be tested; a distribution network networking model and a corresponding fault occurrence model are established in the real-time digital simulator.

Wherein, the analog signal output interface of the real-time digital simulator is connected to the input interface of the power amplifier, and the output interface of the power amplifier is connected to the analog signal input interface of the zero-sequence current adaptive protection device to be tested; The signal input interface is connected to the digital signal output interface of the zero-sequence current adaptive protection device.

The real-time digital simulator outputs the first current and voltage analog signal of the multi-circuit distribution network under the current fault condition obtained by simulation based on the distribution network networking model and the fault occurrence model to the power amplifier. The first current and voltage analog signal is amplified by a power amplifier, and the amplified analog signal is output to the zero-sequence current adaptive protection device.

The zero-sequence current adaptive protection device outputs the corresponding digital control signal to the real-time digital simulator; the zero-sequence current adaptive protection device also outputs the zero-sequence current compensation value under the current fault condition.

The real-time digital simulator adjusts the distribution network network model according to the digital control signal output by the zero-sequence current adaptive protection device, and re-simulates the multi-line distribution network based on the adjusted distribution network network model, and obtains multiple The second current and voltage analog signal of the return line distribution network.

According to the fault condition simulated in the real-time digital simulator, the zero-sequence current compensation value output by the zero-sequence current adaptive protection device, and the first current voltage analog signal and the second current simulated by the real-time digital simulator The voltage analog signal is used to determine the functional index of the zero-sequence current adaptive protection device. Therefore, the functional index of the zero-sequence current adaptive protection device can be fully tested, and the implementation cost is low and the efficiency is high.

Based on the same idea as the method for testing the functional indicators of the zero-sequence current adaptive protection device in the above-mentioned embodiments, the present invention also provides a device for testing the functional indicators of the zero-sequence current adaptive protection device, which can be used to perform the above-mentioned zero-sequence current test A method for adaptive protection device function index. For the convenience of description, in the structural schematic diagram of the device embodiment for testing the functional indicators of the zero-sequence current adaptive protection device, only the parts related to the embodiment of the present invention are shown. Those skilled in the art can understand that the illustrated structure does not constitute a reference to System definitions may include more or fewer components than shown, or combinations of certain components, or different arrangements of components.

FIG. 6 is a schematic structural diagram of a device for testing the functional indicators of a zero-sequence current adaptive protection device according to an embodiment of the present invention. As shown in Figure 6, the device for testing the functional indicators of the zero-sequence current adaptive protection device in this embodiment includes: an initialization module 610, a fault condition generation module 620, a primary simulation module 630, a device information acquisition module 640, and a secondary simulation module 650 And the indicator determination module 660, each module is described in detail as follows:

The initialization module 610 is used to initialize the distribution network networking model pre-established in the real-time digital simulator according to the actual operation information of the multi-circuit distribution network grounded with small resistance;

The fault condition generation module 620 is used to obtain the current fault condition according to the fault occurrence model corresponding to the distribution network networking model in the real-time digital simulator;

The primary simulation module 630 is used to control the real-time digital simulator to perform multi-circuit distribution network simulation under current fault conditions based on the current distribution network network model, and obtain the first current and voltage of the multi-circuit distribution network analog signal;

The device information acquisition module 640 is configured to transmit the first current and voltage analog signal to the zero-sequence current adaptive protection device to be tested; and obtain the zero-sequence current adaptive protection device according to the first current and voltage Zero-sequence current compensation value and digital control signal output by analog signal;

The secondary simulation module 650 is configured to adjust the distribution network networking model according to the digital control signal, and control the real-time digital simulator to re-execute the multi-line distribution network based on the adjusted distribution network networking model. Simulation to obtain the second current and voltage analog signal of the multi-circuit distribution network;

The index determination module 660 is configured to determine the functional index of the zero-sequence current adaptive protection device according to the fault condition, the current compensation value, the first current-voltage analog signal and the second current-voltage analog signal.

In an optional embodiment, the distribution network networking model includes: a main network model, a transformer model, a grounding transformer model, a small resistance model, an overhead line model and/or a load model.

In an optional embodiment, the fault conditions include: fault location, fault occurrence time, number of fault lines, transition resistance, grounding initial angle and/or intermittent time.

In an optional embodiment, the index determination module 660 can be specifically configured to: determine the zero-sequence current adaptive Zero-sequence current adaptive protection action time index, zero-sequence current adaptive value index and/or zero-sequence current compensation effect index of the protection device.

In an optional embodiment, the device information acquisition module 650 may be specifically configured to input the first current and voltage analog signal into a power amplifier for amplification processing, and transmit the amplified analog signal to the waiting Tested zero-sequence current adaptive protection device.

It should be noted that in the implementation of the device for testing the functional indicators of the zero-sequence current adaptive protection device in the above example, the information interaction and execution process between the modules are based on the same idea as the foregoing method embodiments of the present invention. The technical effects brought about by it are the same as those of the aforementioned method embodiments of the present invention, and for specific content, please refer to the description in the method embodiments of the present invention, which will not be repeated here.

In addition, in the implementation of the device for testing the functional indicators of the zero-sequence current adaptive protection device in the above example, the logical division of each functional module is only an example. Considering the convenience of the implementation, the above function allocation is completed by different functional modules, that is, the internal structure of the device for testing the functional indicators of the zero-sequence current adaptive protection device is divided into different functional modules to complete all or part of the above description Function. Each function module can be implemented in the form of hardware or in the form of software function modules.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above-mentioned embodiments can be completed by instructing related hardware through computer programs, and the programs can be stored in a computer-readable storage medium as independent product sale or use. When the program is executed, all or part of the steps in the embodiments of the above-mentioned methods can be performed. In addition, the storage medium can also be set in a computer device, and the computer device also includes a processor, and when the processor executes the program in the storage medium, all of the embodiments of the above-mentioned methods can be realized. or partial steps. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM) and the like.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments. It can be understood that the terms "first", "second", etc. used herein are used to distinguish objects, but these objects are not limited by these terms.

The above-mentioned embodiments only express several implementation modes of the present invention, and should not be construed as limiting the patent scope of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. a kind of method for testing zero-sequence current self-adaptive protector functional parameter, it is characterised in that including：

Pre-established according in the actual motion information initializing Real Time Digital Simulator of many loop line power distribution networks of low resistance grounding Power distribution network network model；

According to failure generation model corresponding with the power distribution network network model in Real Time Digital Simulator, current failure is drawn Condition；

Based on current power distribution network network model, control Real Time Digital Simulator carries out many loop line distribution under the conditions of current failure Network simulation, obtains the first Current Voltage analog signal of many loop line power distribution networks；

The first Current Voltage analog signal is delivered to zero-sequence current self-adaptive protector to be tested；Obtain described zero Sequence current automatic adaptation protection device is according to the zero sequence current compensation numerical value and numeral of the first Current Voltage analog signal output Control signal；

The power distribution network network model is adjusted according to the digital controlled signal, based on the power distribution network network model after adjustment, control Real Time Digital Simulator processed re-starts many loop line distribution network simulations, obtains the second Current Voltage simulation letter of many loop line power distribution networks Number；

Simulated and believed according to the fault condition, current compensation numerical value, the first Current Voltage analog signal and the second Current Voltage Number, determine the functional parameter of the zero-sequence current self-adaptive protector.

2. the method for test zero-sequence current self-adaptive protector functional parameter according to claim 1, it is characterised in that According to the fault condition, current compensation numerical value, the first Current Voltage analog signal and the second Current Voltage analog signal, really The zero-sequence current adaptive guard actuation time index of the fixed zero-sequence current self-adaptive protector, zero-sequence current adaptation value Index and/or zero sequence current compensation effectiveness indicator.

3. the method for test zero-sequence current self-adaptive protector functional parameter according to claim 1, it is characterised in that The power distribution network network model includes：Major network model, transformer model, grounding transformer model, small resistor model, overhead line Model and/or load model；

And/or,

The fault condition includes：Moment, faulty line number, transition resistance, ground connection initial angle occur for abort situation, failure And/or the intermittent time.

4. according to the method for any described test zero-sequence current self-adaptive protector functional parameter of claims 1 to 3, it is special Levy and be, the first Current Voltage analog signal is delivered to zero-sequence current self-adaptive protector to be tested, including：

The first Current Voltage analog signal input power amplifier is amplified processing, will by the power amplifier Analog signal after enhanced processing is delivered to zero-sequence current self-adaptive protector to be tested.

5. a kind of device for testing zero-sequence current self-adaptive protector functional parameter, it is characterised in that including：

Initialization module, the actual motion information initializing real-time digital for many loop line power distribution networks according to low resistance grounding is imitated The power distribution network network model pre-established in true device；

Fault condition generation module, for being sent out according to failure corresponding with the power distribution network network model in Real Time Digital Simulator Raw model, draws current fault condition；

Emulation module, for based on current power distribution network network model, control Real Time Digital Simulator to carry out current failure Under the conditions of many loop line distribution network simulations, obtain the first Current Voltage analog signal of many loop line power distribution networks；

Device information acquisition module, it is adaptive for the first Current Voltage analog signal to be delivered into zero-sequence current to be tested Answer protection device；And the zero-sequence current self-adaptive protector is obtained according to the first Current Voltage analog signal output Zero sequence current compensation numerical value and digital controlled signal；

Secondary simulation module, for adjusting the power distribution network network model according to the digital controlled signal, after adjustment Power distribution network network model, control Real Time Digital Simulator re-starts many loop line distribution network simulations, obtains many loop line power distribution networks Second Current Voltage analog signal；

And, index determining module, for according to the fault condition, current compensation numerical value, the first Current Voltage analog signal And the second Current Voltage analog signal, determine the functional parameter of the zero-sequence current self-adaptive protector.

6. the device of test zero-sequence current self-adaptive protector functional parameter according to claim 5, it is characterised in that The power distribution network network model includes：Major network model, transformer model, grounding transformer model, small resistor model, overhead line Model and/or load model；

And/or,

The fault condition includes：Moment, faulty line number, transition resistance, ground connection initial angle occur for abort situation, failure And/or the intermittent time.

7. the device of the test zero-sequence current self-adaptive protector functional parameter according to claim 5 or 6, its feature exists In,

The index determining module, specifically for being believed according to the fault condition, current compensation numerical value, the simulation of the first Current Voltage Number and the second Current Voltage analog signal, determine the zero-sequence current adaptive guard of the zero-sequence current self-adaptive protector Actuation time index, zero-sequence current adaptation value index and/or zero sequence current compensation effectiveness indicator；

And/or,

Described device data obtaining module, specifically for the first Current Voltage analog signal input power amplifier is carried out Enhanced processing, by the analog signal after enhanced processing is delivered to zero-sequence current to be tested adaptive by the power amplifier Protection device；It is provided with the power amplifier.

8. a kind of system for testing zero-sequence current self-adaptive protector functional parameter, it is characterised in that including：Real-time digital is imitated True device, power amplifier and zero-sequence current self-adaptive protector to be tested；Being set up in the Real Time Digital Simulator has Power distribution network network model and its corresponding failure generation model；

The analog signal output interface of the Real Time Digital Simulator connects the input interface of power amplifier, power amplifier Output interface connects the analog input interface of zero-sequence current self-adaptive protector to be tested；The real-timedigital simulation The data signal input interface of device connects the data signal output interface of the zero-sequence current self-adaptive protector；

Under the conditions of the current failure that Real Time Digital Simulator will be obtained based on power distribution network network model and the emulation of failure generation model First Current Voltage analog signal output of many loop line power distribution networks is to power amplifier；By power amplifier to the described first electricity Stream voltage analog signal is amplified, and by the analog signal output after amplification to the zero-sequence current self-adaptive protector； Zero-sequence current self-adaptive protector exports corresponding digital controlled signal to Real Time Digital Simulator；The zero-sequence current is adaptive Protection device is answered also to export the zero sequence current compensation numerical value under the conditions of current failure；

The digital controlled signal that Real Time Digital Simulator is exported according to the zero-sequence current self-adaptive protector adjusts power distribution network Network model, and many loop line distribution network simulations are re-started based on the power distribution network network model after adjustment, obtain many loop line distribution Second Current Voltage analog signal of net；

According to the zero of fault condition, the zero-sequence current self-adaptive protector output simulated in the Real Time Digital Simulator Sequence current compensation numerical value, and the Real Time Digital Simulator emulate the first obtained Current Voltage analog signal and the second electric current Voltage analog signal, determines the functional parameter of the zero-sequence current self-adaptive protector.

9. a kind of computer-readable recording medium, is stored thereon with computer program, it is characterised in that the program is held by processor The step of Claims 1-4 any methods described is realized during row.

10. a kind of computer equipment, including memory, processor and storage are on a memory and the meter that can run on a processor Calculation machine program, it is characterised in that the step of any methods described of Claims 1-4 is realized during the computing device described program Suddenly.