CN107394897A - A kind of power distribution network intelligence self-healing method and system based on topological diagram - Google Patents

Abstract

The invention discloses a distribution network intelligent self-healing method and system based on a topological graph. The method includes the following steps: step S1, establishment of a network topology graph; step S2, classification of distribution network lines; step S3, fault section Judgment; step S4, fault processing. The system includes a master power distribution station and a distribution substation, the power distribution master station is respectively connected with the distribution network automation system and the connecting distribution substation, and the distribution substation is connected with a power distribution terminal. The present invention uses the distribution network intelligent self-healing method based on the network topology graph, and upgrades the judgment rules of the distribution network fault section by means of the topology graph, so that the distribution network automation system can adapt to complex distribution network lines (that is, radial multi-branch line) needs.

Description

A distribution network intelligent self-healing method and system based on topology graph

technical field

The invention relates to the technical field of distribution network automation, in particular to an intelligent self-healing method and system for a distribution network based on a topology map.

Background technique

With the progress of my country's modernization, the demand for electricity in all walks of life is increasing, especially in areas with rapid economic development, the industrial and civil loads are rising rapidly, and the number of power distribution systems and their equipment has increased significantly. The network structure of the system is becoming more and more complex, and the power supply operation mode is changing more and more frequently. There are higher and higher requirements for the stability of distribution network operation, the effectiveness of regulation, and the reliability of fault section judgment. Therefore, the accurate determination of the fault section of the more complex distribution network and the rapid processing of the fault have become an important part of the work of the distribution network.

For the topology and abstraction of all power equipment in the regional distribution network, abstraction is an important means of distribution network analysis. As an important means to improve the reliability of power supply of distribution system, distribution automation technology has been widely used in the world. my country started late in the construction of distribution automation projects, and the development level of various regions is also uneven. There are many problems, such as The distribution automation can only correctly handle centralized equipment, and some cannot cooperate correctly with boundary switches, and so on. Therefore, research on how to design a distribution network that can perfectly handle various types of equipment (concentrated, voltage, and boundary) and various types of faults encountered (instantaneous, permanent single-phase grounding or multi-phase faults) in the distribution network Intelligent self-healing technology to realize advanced functions of fault location, isolation, and self-healing power transmission in non-fault areas has become a very important and necessary topic.

Contents of the invention

Aiming at the shortcomings of existing distribution network automation technology, the present invention proposes an intelligent self-healing method and system for distribution network based on topological graph.

The technical scheme that the present invention solves its technical problem to take is:

The invention provides an intelligent self-healing method for a distribution network based on a topological graph, which includes the following steps:

Step S1, establishment of network topology diagram: the distribution substation establishes each line in the distribution network automation system, as well as circuit breakers, isolating switches, section switches, tie switches and other power distribution lines in each line according to the command of the distribution master station. The network topology diagram of the device;

Step S2, grading of distribution network lines: According to the network topology diagram, the distribution master station divides the circuit breakers, isolating switches, section switches and tie switches in each line in the distribution network automation system. Electrical equipment is classified according to the topological relationship, and is divided into multi-level switches from top to bottom. The multi-level switches are divided into first-level switches, second-level switches, and third-level switches from top to bottom. Arrange under;

Step S3, judgment of the fault section: when a line or distribution network equipment fails, the distribution terminal in the distribution network automation system detects the fault current, and the distribution master station judges the fault in the smallest range according to the level relationship in the topology relationship section;

Step S4, fault handling: the power distribution master station starts a fault processing program, isolates the fault point, and closes the tie switch of the non-faulty section to restore power supply.

Further, the main power distribution station is connected to the distribution substation through a wired network, and the distribution substation is connected to the power distribution terminal through a wired network, and the main power distribution station is responsible for monitoring the information of the distribution network automation system and management for data collection and monitoring of the entire distribution network, and complete fault handling within the entire distribution network. At the same time, it provides equipment management and geographic information systems, and provides distribution network professional software to realize the entire distribution network. The operation control of the power grid system; the distribution substation is connected to the power distribution terminal and the power distribution main station, and is used to manage the monitoring equipment at the distribution station end, collect, summarize, and upload the signals of the power distribution terminal to the power distribution main station, At the same time, the instructions of the power distribution master station are forwarded to the power distribution terminal; the power distribution terminal is used to complete the data collection of the primary equipment, the control of the switchgear, and the detection and identification of faults. Coordinate the data information transmission function, and send the fault information to the distribution substation and the distribution master station.

Further, the network topology map is used to revise and upgrade the judgment rule of the faulty section, and write the judgment rule into the power distribution system control algorithm and fault processing program of the power distribution master station, so that the power distribution based on the topology map The network intelligent self-healing method is suitable for dealing with the faults of various centralized, voltage and boundary power distribution equipment. The distribution network intelligent self-healing method based on the topological graph can be used for transient, permanent, single-phase or multi-phase various distribution network power failures, and the topological graph-based distribution network intelligent self-healing method can also It is used to realize advanced functions of fault location, isolation, and self-healing power transmission in non-faulty sections.

Further, in step S3, the judgment process of the fault section is as follows: the line between the switch that can detect the fault current at the last stage and all the switches adjacent to it and all the switches of the next stage that cannot detect the fault current is judged as a fault segment.

Boundary-type equipment can be introduced into various power distribution equipment in the network topology diagram, and each power distribution line can be equipped with multiple boundary switches or boundary circuit breakers to ensure smooth coordination of power distribution terminals and accurately identify faults Scope, reduce the power outage scope.

Further, the power distribution terminal includes FTU, DTU and TTU, FTU is a feeder terminal equipment, and the feeder terminal equipment is installed next to the feeder switch for monitoring the feeder switch, and DTU is a switch station terminal equipment, the Switching station terminal equipment is installed in conventional switching stations, outdoor small switching stations, ring network cabinets, small substations, and box-type substations to complete the position signal, voltage, current, active power, and reactive power of switching equipment. Acquisition and calculation of power, power factor, electric energy and other data, open and close the switch, realize the fault identification and isolation of the feeder switch and restore power supply to the non-faulty area, some DTUs also have protection and automatic input of backup power The TTU is the terminal equipment of the distribution transformer. The terminal equipment of the distribution transformer is used to monitor and record the operating conditions of the distribution transformer. According to the three-phase voltage and current sampling values of the low-voltage side, the voltage effective value is calculated every 1 to 2 minutes. , RMS current, active power, reactive power, power factor, active energy, reactive energy and other operating parameters.

Further, the network topology diagram is obtained by the power distribution master station after performing topology analysis on the distribution network. The topology analysis of the power distribution network is based on the connection relationship of the distribution electrical components, and the entire power distribution network is regarded as a line and Point-combined network topology diagram, and then analyze the topology connection of the entire network according to the power supply node, switch node, etc. The topology relationship is the state estimation, power flow calculation, fault location, isolation and power supply restoration, and network reconstruction of the power distribution network. basis for other analyses.

The present invention provides an intelligent self-healing system for a distribution network based on a topology diagram, which includes a main power distribution station and a distribution substation, and the main power distribution station is connected to the distribution network automation system and the connected distribution substation respectively, It is used to monitor and manage the distribution network automation system information, as well as to collect and monitor the data of the entire distribution network; the distribution substation is connected with the distribution terminal to manage the monitoring equipment at the distribution station end The signals of the power distribution terminal are collected, summarized, and uploaded to the power distribution master station, and at the same time, the instructions of the power distribution master station are forwarded to the power distribution terminal; the power distribution terminal is used to complete the data collection of primary equipment and the control of switchgear The detection and identification of control and faults have the functions of telemetry, remote signaling, remote control, remote adjustment and data information transmission, and send fault information to distribution substations and distribution master stations.

Further, the main power distribution station is connected to the distribution substation through a wired network, and the distribution substation is connected to a power distribution terminal through a wired network.

Further, the power distribution terminal includes FTU, DTU and TTU, FTU is a feeder terminal equipment, and the feeder terminal equipment is installed next to the feeder switch for monitoring the feeder switch, and DTU is a switch station terminal equipment, the Switching station terminal equipment is installed in conventional switching stations, outdoor small switching stations, ring network cabinets, small substations, and box-type substations to complete the position signal, voltage, current, active power, and reactive power of switching equipment. Acquisition and calculation of power, power factor, electric energy and other data, open and close the switch, realize the fault identification and isolation of the feeder switch and restore power supply to the non-faulty area, some DTUs also have protection and automatic input of backup power The TTU is the terminal equipment of the distribution transformer. The terminal equipment of the distribution transformer is used to monitor and record the operating conditions of the distribution transformer. According to the three-phase voltage and current sampling values of the low-voltage side, the voltage effective value is calculated every 1 to 2 minutes. , RMS current, active power, reactive power, power factor, active energy, reactive energy and other operating parameters.

Further, the primary equipment includes circuit breakers, isolating switches, section switches and tie switches in the distribution network lines.

The beneficial effects of the present invention are:

The present invention uses the distribution network intelligent self-healing method based on the network topology graph, and upgrades the judgment rules of the distribution network fault section by means of the topology graph, so that the distribution network automation system can adapt to complex distribution network lines (that is, radial multi-branch line) needs. In addition, the present invention is helpful for the application of boundary equipment in the distribution network, and enables it to cooperate smoothly with the main line equipment. If a fault occurs in the rear section of the boundary switch, it can be quickly cut off, avoiding affecting the operation safety of the main line, and reducing the scope of fault power outages and The scope of fault inspection improves the efficiency of power distribution repair and the reliability of power supply.

The invention provides a distribution network automation technology that matches with the actual operating line and can handle various types of faults (instantaneous, permanent single-phase grounding or multi-phase faults), and can ensure that various equipment (centralized Type, voltage type, boundary type) correct cooperation, precise fault range, and smooth self-healing.

Description of drawings

Fig. 1 is a fault processing principle diagram of a centralized distribution network automation system in the prior art;

Fig. 2 is a method flowchart of the present invention;

Fig. 3 is a schematic diagram of processing faults in the radial centralized and demarcated distribution network automation system by using the method of the present invention.

detailed description

The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings. The following disclosure provides many different embodiments for implementing the device and method of the present invention, so that those skilled in the art can more clearly understand how to implement the present invention. To simplify the disclosure of the present invention, components and steps of specific examples are described below. Furthermore, the present invention may repeat reference numerals or letters in different examples. This repetition is for simplicity and clarity and does not in itself indicate a relationship between the various embodiments or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily limiting the present invention. It should be understood that although the invention has been described in terms of preferred embodiments thereof, these are illustrative of the embodiments only, and are not intended to limit the scope of the invention.

Aiming at the deficiencies of the existing distribution network automation technology, taking the occurrence of multiple permanent failures of centralized equipment as an example, it is used to compare and illustrate the shortcomings of the existing distribution network schemes. As shown in Figure 1, CB1 and CB2 are substation 10kV outlet circuit breakers with three-stage current protection, S1, S2, and S3 are three centralized pole-mounted section switches for line 1, and S4, S5, and S6 are line 2 L1 is the contact switch between line 1 and line 2 (a centralized on-pole switch, normally in the split position, and the switches on both sides of the switch are in the close position).

As shown in Figure 1, CB1 and CB2 are substation 10kV outlet circuit breakers with three-stage current protection, S1-S6 are centralized intelligent segmental switches, and L1 is a contact switch between line 1 and line 2 (normally in disconnection state).

When a permanent phase-to-phase short circuit or multi-phase fault occurs at point F, CB1 trips and fails to reclose after 1s (or recloses without reclosing, CB1 remains in the position after tripping for the first time), and at the same time the master station uploads information according to each FTU The locked fault section is located between the switches S2 and S3. After waiting for 30s, the master station starts the fault processing program, and issues an instruction to remotely open S2 and S3 and lock them so that they cannot be closed again, so as to isolate the fault point. Then the master station sends an instruction to close CB1, and the non-faulty section near the power supply side resumes power transmission. Finally, the master station sends an instruction to close L1, and the non-faulty section close to the load side resumes power transmission from line 2.

From the line model given above, it can be concluded that the existing distribution automation technology can only solve the following simple problems: First, the line model is simple, and the line in the illustration is the main line segmented line, which is the simplest and most basic Most of the distribution network lines in actual operation are radial multi-branch lines; the second is that no demarcation equipment is introduced into the line model, and each actual operation line is equipped with about 4 to 20 demarcation switches.

Aiming at the shortcoming of prior art, the present invention provides a kind of distribution network intelligent self-healing method based on topological graph, as shown in Figure 2, it comprises the following steps:

Step S1, establishment of network topology diagram: the distribution substation establishes each line in the distribution network automation system, as well as circuit breakers, isolating switches, section switches, tie switches and other power distribution lines in each line according to the command of the distribution master station. The network topology diagram of the device;

Step S2, grading of distribution network lines: According to the network topology diagram, the distribution master station divides the circuit breakers, isolating switches, section switches and tie switches in each line in the distribution network automation system. Electrical equipment is classified according to the topological relationship, and is divided into multi-level switches from top to bottom. The multi-level switches are divided into first-level switches, second-level switches, and third-level switches from top to bottom. Arrange under;

Step S3, judgment of the fault section: when a line or distribution network equipment fails, the distribution terminal in the distribution network automation system detects the fault current, and the distribution master station judges the fault in the smallest range according to the level relationship in the topology relationship section;

Step S4, fault handling: the power distribution master station starts a fault processing program, isolates the fault point, and closes the tie switch of the non-faulty section to restore power supply.

In the above method, the main power distribution station is connected to the distribution substation through a wired network, the distribution substation is connected to the power distribution terminal through a wired network, and the main power distribution station is responsible for the distribution network automation system information The monitoring and management of the entire distribution network is used to collect and monitor the data of the entire distribution network, and complete the fault handling within the scope of the entire distribution network. The operation control of the distribution network system; the distribution substation is connected to the distribution terminal and the main distribution station, and is used to manage the monitoring equipment at the distribution station end, collect, summarize and upload the signals of the distribution terminal to the main distribution station station, and at the same time forward the instructions of the power distribution master station to the power distribution terminal; , remote adjustment and data information transmission functions, and send fault information to the distribution substation and distribution master station.

In the above method, the network topology map is used to revise and upgrade the judgment rule of the fault section, and write the judgment rule into the power distribution system control algorithm and fault processing program of the power distribution master station, so that the topological map-based The intelligent self-healing method of distribution network is suitable for dealing with the faults of various centralized, voltage and boundary distribution equipment. The distribution network intelligent self-healing method based on the topological graph can be used for transient, permanent, single-phase or multi-phase various distribution network power failures, and the topological graph-based distribution network intelligent self-healing method can also It is used to realize advanced functions of fault location, isolation, and self-healing power transmission in non-faulty sections.

In the above method, in step S3, the judgment process of the fault section is: judge the line between the last switch that can detect the fault current and all the switches adjacent to it and that cannot detect the fault current. for the faulty section.

In the above method, boundary-type equipment can be introduced into various power distribution equipment in the network topology diagram, and multiple boundary switches or boundary circuit breakers can be equipped in each power distribution line to ensure that the power distribution terminals cooperate Smooth and accurate identification of the fault range, narrowing the scope of power outages.

In the above method, the power distribution terminal includes FTU, DTU and TTU, the FTU is a feeder terminal equipment, the feeder terminal equipment is installed next to the feeder switch, and is used to monitor the feeder switch, and the DTU is a switching station terminal equipment, The switching station terminal equipment is installed in conventional switching stations, outdoor small switching stations, ring main unit, small substations, and box-type substations to complete the position signal, voltage, current, active power, Acquisition and calculation of reactive power, power factor, electric energy and other data, open and close the switch, realize the fault identification and isolation of the feeder switch and restore power supply to the non-faulty area, some DTUs also have protection and backup power The function of automatic input, TTU is the distribution transformer terminal equipment, the distribution transformer terminal equipment is used to monitor and record the operating conditions of the distribution transformer, and calculate the voltage every 1 to 2 minutes according to the three-phase voltage and current sampling values at the low voltage side RMS, current RMS, active power, reactive power, power factor, active energy, reactive energy and other operating parameters.

In the above method, the network topology diagram is obtained after the distribution network topology analysis is performed by the power distribution master station, and the topology analysis of the power distribution network is based on the connection relationship of the distribution electrical components, and the entire power distribution network is regarded The network topology diagram combining lines and points, and then analyze the topology connection of the entire network according to the power supply nodes, switch nodes, etc. The basis for other analyses, such as refactoring.

In order to implement the above method, the present invention also provides a distribution network intelligent self-healing system based on a topology graph, which includes a power distribution master station and a distribution substation, and the power distribution master station is connected to the distribution network automation system and The distribution substation is connected to monitor and manage the information of the distribution network automation system, as well as to collect and monitor the data of the entire distribution network; the distribution substation is connected to the power distribution terminal to manage the distribution substation terminal monitoring equipment, and collect, summarize, and upload the signals of the power distribution terminal to the power distribution master station, and at the same time forward the instructions of the power distribution master station to the power distribution terminal; the power distribution terminal is used to complete the data of the primary equipment Acquisition, control of switchgear and detection and identification of faults, with functions of telemetry, remote signaling, remote control, remote adjustment and data information transmission, and send fault information to distribution substations and distribution master stations.

In the above system, the main power distribution station is connected to the distribution substation through a wired network, and the distribution substation is connected to the power distribution terminal through a wired network.

In the above system, the power distribution terminal includes FTU, DTU and TTU, FTU is the feeder terminal equipment, the feeder terminal equipment is installed next to the feeder switch, and is used to monitor the feeder switch, DTU is the switch station terminal equipment, The switching station terminal equipment is installed in conventional switching stations, outdoor small switching stations, ring main unit, small substations, and box-type substations to complete the position signal, voltage, current, active power, Acquisition and calculation of reactive power, power factor, electric energy and other data, open and close the switch, realize the fault identification and isolation of the feeder switch and restore power supply to the non-faulty area, some DTUs also have protection and backup power The function of automatic input, TTU is the distribution transformer terminal equipment, the distribution transformer terminal equipment is used to monitor and record the operating conditions of the distribution transformer, and calculate the voltage every 1 to 2 minutes according to the three-phase voltage and current sampling values at the low voltage side RMS, current RMS, active power, reactive power, power factor, active energy, reactive energy and other operating parameters.

In the above system, the primary equipment includes circuit breakers, isolating switches, section switches and tie switches in the distribution network lines.

Hereinafter, a specific application of the present invention will be introduced in detail by taking the radial centralized and demarcated line as an example.

Compared with the main line segmented line, the radial centralized boundary type distribution automation is more complicated in the working principle of the judgment rules of the fault section. Because of the existence of the branch line, each end of the fault section may not only have two switches, but some Maybe three or even four, so that the fault point can only be isolated by jumping all the switches at each end. Therefore, in the radial line, the criterion of the fault section needs to be corrected depending on the topological relationship between the devices. Here, we use the switch that can detect the fault current in the last stage and all the switches in the next stage adjacent to it (these switches No fault current should be detected at all), and the line between them is judged as the fault section.

As shown in Figure 3, CB1~4 are four substation 10kV outlet circuit breakers with three-stage current protection (the recloser is in the input state), and S1~7 are seven centralized pole-mounted section switches of line 1. F1~6 are the six demarcation pole-mounted section switches of line 1, L1~3 are contact switches between line 1 and lines 2, 3, and 4 respectively (belonging to the centralized type pole-mounted switch, normally in the sub-position, on both sides of the switch The knife switch is in position). It can be seen from the topological relationship that CB1 is the first-level switch, S1 and S4 are the second-level switches, S2, S6, and S5 are the third-level switches, and S3 and S7 are the fourth-level switches.

When a permanent multi-phase fault occurs at point F, only the two switches CB1 and S1 can detect the fault current, and the other switches cannot detect the fault current, and S1 is one level behind CB1, so the master station determines that the fault section is Between S1 and its adjacent S2 and S6. Therefore, when a fault occurs at point F, CB1 trips and fails to reclose after 1 second. After 30 seconds, the master station starts the fault processing program, sends an instruction to remotely open S1, S2, and S6 and lock them so that they cannot be closed again, and isolate the fault point. Then the master station sends an instruction to close CB1, and the non-faulty section in front of S1 (including the branch lines including S4 and S5) resumes power transmission. Finally, the master station successively sends out commands to remotely close L1 and L3, and restore the power supply to the non-faulty sections in the back section of S2 and S6 respectively from lines 2 and 4.

When a permanent multi-phase fault occurs at point F', CB1 trips, and the F3 switch loses voltage and opens because the detected current exceeds the overcurrent setting value. After 1s, CB1 recloses successfully, and the master station does not start the fault handling program.

Using the intelligent self-healing method of the distribution network based on the topological graph of the present invention, compared with the existing distribution automation technology, the present invention upgrades the judgment rules of the fault section with the help of the topological graph, so that the distribution automation can adapt to complex distribution network lines ( That is, the need for radial multi-branch lines). The boundary type equipment is added to the model, and it can be smoothly coordinated with the main line equipment. If a fault occurs in the rear section of the boundary switch, it can be quickly removed to avoid affecting the safety of the main line operation. The efficiency and reliability of power supply and the scope of application of distribution automation system have improved the intelligence of distribution network.

The invention provides a distribution network automation technology that can handle various types of faults (instantaneous, permanent single-phase grounding or multi-phase faults), and can guarantee ) correct cooperation, precise fault range, and smooth self-healing.

In addition, the scope of application of the present invention is not limited to the process, mechanism, manufacture, material composition, means, method and steps of the specific embodiments described in the specification. From the disclosure of the present invention, those of ordinary skill in the art will easily understand that for the processes, mechanisms, manufacturing, material compositions, means, methods or steps that currently exist or will be developed in the future, they are implemented in accordance with the present invention Corresponding embodiments described that do substantially the same way, or achieve substantially the same results, can be applied in accordance with the present invention. Therefore, the appended claims of the present invention are intended to include these processes, mechanisms, manufacture, material compositions, means, methods or steps within their protection scope.

Claims (10)

1. a kind of power distribution network intelligence self-healing method based on topological diagram, it is characterized in that, comprise the following steps：

Step S1, the foundation of network topological diagram：Established with electronic station according to the order of distribution main website in distribution automation system Each circuit and breaker in each circuit, disconnecting switch, block switch, the network of interconnection switch and other controller switching equipments are opened up Flutter figure；

Step S2, the classification of distribution network line：According to the network topological diagram, the distribution main website is by distribution automation system In breaker, disconnecting switch, block switch and interconnection switch in each circuit be classified according to topological relation, divide successively from top to bottom For multiple-pole switch；

Step S3, the judgement of fault section：When circuit or Distribution Network Equipment break down, by matching somebody with somebody in distribution automation system Electric terminals detect fault current, and distribution main website judges the fault section of minimum zone according to the level relation in topological relation；

Step S4, the processing of failure：The distribution main website startup separator processing routine, isolated fault point, non-faulting section close Interconnection switch restores electricity.

2. a kind of power distribution network intelligence self-healing method based on topological diagram according to claim 1, it is characterized in that, the distribution Main website is connected by cable network with electronic station, described to be connected with electronic station by cable network with distribution terminal, institute The responsible monitoring and management to distribution automation system information of distribution main website is stated, to carry out data acquisition to whole power distribution network And monitoring, the troubleshooting in the range of whole power distribution network is completed, while equipment control and GIS-Geographic Information System are provided, and provide and match somebody with somebody Power network professional software, to realize that the operation to whole distribution network system controls；It is described to be connected to distribution terminal with electronic station and match somebody with somebody Electric main website, to manage power distribution station end monitoring device, the signal of distribution terminal is acquired, collect, is uploaded to distribution main website, The instruction of distribution main website is forwarded to distribution terminal simultaneously；The distribution terminal to complete data acquisition to primary equipment, The control of switching devices and the detection of failure and identification, there is remote measurement, remote signalling, remote control, remote regulating and data message transfer function, And fault message is sent to electronic station and distribution main website.

3. a kind of power distribution network intelligence self-healing method based on topological diagram according to claim 1, it is characterized in that, the network Topological diagram is used to revise upgrade failure section decision rule, and the decision rule is write to the distribution system control of distribution main website Algorithm and exception handles.

4. a kind of power distribution network intelligence self-healing method based on topological diagram according to claim 1, it is characterized in that, in step S3 In, the deterministic process of fault section is：By afterbody can detect fault current switch and it is adjacent thereto and detection not Fault section is judged to circuit between all switches of next stage of fault current.

5. a kind of power distribution network intelligence self-healing method based on topological diagram according to claim 1, it is characterized in that, the distribution Terminal includes FTU, DTU and TTU, and FTU is Feeder Terminal Unit, and the Feeder Terminal Unit is arranged on by feeder switch, is used for Feeder switch is monitored, DTU is switching station terminal equipment, the switching station terminal equipment be arranged on conventional switching station, Outdoor small-sized switching station, ring main unit, Small Substation, at box-type substation, to complete the position signalling of switching devices, electricity The collection and calculating of pressure, electric current, active power, reactive power, power factor and electric energy data, it is split to put row divide-shut brake behaviour into Make, realize the Fault Identification to feeder switch, isolation and non-faulting section is restored electricity, part DTU be also equipped with protection and The function of alternate power autocast, TTU are distribution transformer terminals equipment, and the distribution transformer terminals equipment becomes to monitor and record distribution Depressor operating condition, according to low-pressure side three-phase voltage, current sampling data, primary voltage virtual value, electricity were calculated every 1~2 minute Flow virtual value, active power, reactive power, power factor, active energy and reactive energy operational factor.

6. a kind of power distribution network intelligence self-healing method based on topological diagram according to claim 1, it is characterized in that, the network Topological diagram obtains after carrying out topological analysis to power distribution network by distribution main website, and the topological analysis of distribution network is according to distribution electricity The annexation of gas element, whole distribution network is regarded as the network topological diagram that line combines with point, then according to power junctions and The topological line analysis that node carries out whole network is switched, topological relation is that distribution network carries out state estimation, Load flow calculation, event Barrier positioning, isolation and service restoration and the basis of network reconfiguration analysis.

7. a kind of power distribution network intelligence self-healing system based on topological diagram, it is characterized in that, including distribution main website and with electronic station, it is described Distribution main website is connected with distribution automation system and being connected with electronic station respectively, to distribution automation system information Monitoring and management, and data acquisition and monitoring are carried out to whole power distribution network；It is described to be connected with electronic station with distribution terminal, To manage power distribution station end monitoring device, and the signal of distribution terminal is acquired, collects, be uploaded to distribution main website, simultaneously The instruction of distribution main website is forwarded to distribution terminal；The distribution terminal is completing data acquisition to primary equipment, split The control of equipment and the detection and identification of failure are closed, there is remote measurement, remote signalling, remote control, remote regulating and data message transfer function, and will Fault message is sent to electronic station and distribution main website.

8. a kind of power distribution network intelligence self-healing system based on topological diagram according to claim 7, it is characterized in that, the distribution Main website is connected by cable network with electronic station, described to be connected with electronic station by cable network with distribution terminal.

9. a kind of power distribution network intelligence self-healing system based on topological diagram according to claim 7, it is characterized in that, the distribution Terminal includes FTU, DTU and TTU, and FTU is Feeder Terminal Unit, and the Feeder Terminal Unit is arranged on by feeder switch, is used for Feeder switch is monitored, DTU is switching station terminal equipment, the switching station terminal equipment be arranged on conventional switching station, Outdoor small-sized switching station, ring main unit, Small Substation, at box-type substation, to complete the position signalling of switching devices, electricity The collection and calculating of pressure, electric current, active power, reactive power, power factor and electric energy data, it is split to put row divide-shut brake behaviour into Make, realize the Fault Identification to feeder switch, isolation and non-faulting section is restored electricity, part DTU be also equipped with protection and The function of alternate power autocast, TTU are distribution transformer terminals equipment, and the distribution transformer terminals equipment becomes to monitor and record distribution Depressor operating condition, according to low-pressure side three-phase voltage, current sampling data, primary voltage virtual value, electricity were calculated every 1~2 minute Flow virtual value, active power, reactive power, power factor, active energy and reactive energy operational factor.

10. a kind of power distribution network intelligence self-healing system based on topological diagram according to claim 7, it is characterized in that, described one Secondary device includes breaker, disconnecting switch, block switch and the interconnection switch in distribution network line.