CN105099810A - Communication test method and system for sampling value interface - Google Patents

Abstract

The present invention provides a communication test method oriented to the sampling value interface, including SV release test and SV subscription test, wherein, the SV release test includes: verifying the first test content; also includes verifying at least one of the second test content: Verify the consistency of the SV message, verify the consistency of the SV message sent by the point-to-point port, verify the correct identification of the SV synchronization flag, and verify the dispersion of the SV message; the SV subscription test includes verifying at least one of the third test content : Verify SV subscription parameters, verify SV interrupt processing mechanism, verify SV quality exception processing mechanism, verify SV frame loss and out-of-sequence processing mechanism, verify SV out-of-sync processing mechanism, verify SV rated delay exception processing mechanism, verify SV jitter processing mechanism , Verify the SV receiving platen function, verify the dual AD exception handling mechanism, and verify the SV maintenance handling mechanism. The present invention provides a comprehensive and systematic SV test content.

Description

A communication test method and system for sampling value interface

technical field

The invention relates to the technical field of power system secondary equipment testing, and more specifically, relates to a communication testing method and system oriented to a sampling value interface.

Background technique

With the popularization and application of smart substations, Sampled Value (hereinafter referred to as SV) communication technology has been more widely used. SV is a digital current and voltage quantity, and the combination unit and protection device are realized through a specific communication protocol (the substation has SV communication between the secondary device of the interface). The IEC61850 standard (substation communication network and system series standards) regulates the SV transmission interface, defines the sampling value transmission model in the IEC61850-7-2 abstract communication service interface (ACSI, AbstractCommunicationServiceInterface), and defines in IEC61850-9-2 A specific communication service mapping (SCSM, specific communication service mapping) is established to map the ACSI sampled value transmission model to a specific communication network and protocol. The SV service adopts the publish/subscribe mode, which requires high real-time performance. The publisher writes the sampled data into the buffer of the sending side in the form of a data set, and uses the SendMSVMessage (send multicast sampled value information) service to send the sampled data; Subscribers read data from buffers on the receiving side; the communication system is responsible for updating the buffers on the receiving side.

The current test method is mainly the test of the communication protocol, focusing on the correct sending and receiving of data, that is, the test of the communication link level, and does not involve the response behavior of the SV subscriber under the abnormal sampling data, that is, the lack of communication Application-level testing. This is mainly because the IEC61850 standard itself does not specify the application level of secondary equipment, and this part of the content has corresponding requirements in relevant domestic technical specifications. Due to the lack of communication application testing in existing test methods, it is impossible to guarantee the consistency of sampling value services by various manufacturers, which brings great inconvenience to actual engineering applications.

To sum up, how to provide a communication application test to ensure the consistency of sampling value services by various manufacturers is an urgent problem to be solved by those skilled in the art.

Contents of the invention

In view of this, the object of the present invention is to provide a communication test method and system oriented to the sampled value interface, so as to provide a comprehensive and systematic SV test content, so that the application of SV in domestic engineering sites is of great significance.

In order to achieve the above object, the present invention provides the following technical solutions:

On the one hand, the present invention provides a communication test method oriented to the sampling value interface, including SV release test and SV subscription test, wherein the SV release test includes: verifying the first test content; the SV release test further includes Verify at least one of the second test content:

Verify the consistency of the SV message, verify the consistency of the SV message sent by all point-to-point ports, verify the correct identification of the SV synchronization flag, and verify the dispersion of the SV message;

The SV subscription test further includes verifying at least one of the third test content:

Verify the SV subscription parameters, verify the SV interrupt processing mechanism, verify the SV quality exception processing mechanism, verify the SV frame loss and out-of-sequence processing mechanism, verify the SV out-of-sync processing mechanism, and verify the SV rated Delay exception processing mechanism, verification of the SV jitter processing mechanism, verification of the SV receiving platen function, verification of the dual AD exception processing mechanism, and verification of the SV maintenance processing mechanism.

Preferably, said verifying the first test content includes:

Verify the physical layer interface, verify that the link layer format meets the requirements of IEC61850-9-2, verify the SV message application layer format when the sampling rate is 80 points/cycle, and verify the SV report when the sampling rate is 256 points/cycle format of the application layer, verify the format of the application service data unit data set, verify the completeness of the SV message when the sampling rate is 80 points/cycle, verify the completeness of the SV message when the sampling rate is 256 points/cycle, and verify the completeness of the SV message when the sampling rate is 256 points/cycle. Describe the increment and reset method of the SV message sampling counter, verify the consistency between the SV output and the analog input; verify the resend time of the SV message after the restart of the protection device, and verify the transmission of the SV maintenance quality bit.

On the other hand, the present invention also provides a communication test system oriented to the sampling value interface, including an SV release test module and an SV subscription test module, wherein the SV release test module includes: a first verification unit; The test module further includes at least one verification content in the second verification unit:

Verify the consistency of the SV message, verify the consistency of the SV message sent by all point-to-point ports, verify the correct identification of the SV synchronization flag, and verify the dispersion of the SV message;

The SV subscription test module further includes at least one verification content in the third test unit:

Verify the SV subscription parameters, verify the SV interrupt processing mechanism, verify the SV quality exception processing mechanism, verify the SV frame loss and out-of-sequence processing mechanism, verify the SV out-of-sync processing mechanism, and verify the SV rated Delay exception processing mechanism, verification of the SV jitter processing mechanism, verification of the SV receiving platen function, verification of the dual AD exception processing mechanism, and verification of the SV maintenance processing mechanism.

Preferably, the first verification unit includes:

Verify the physical layer interface, verify that the link layer format meets the requirements of IEC61850-9-2, verify the SV message application layer format when the sampling rate is 80 points/cycle, and verify the SV report when the sampling rate is 256 points/cycle format of the application layer, verify the format of the application service data unit data set, verify the completeness of the SV message when the sampling rate is 80 points/cycle, verify the completeness of the SV message when the sampling rate is 256 points/cycle, and verify the completeness of the SV message when the sampling rate is 256 points/cycle. Describe the increment and reset method of the SV message sampling counter, verify the consistency between the SV output and the analog input; verify the resend time of the SV message after the restart of the protection device, and verify the transmission of the SV maintenance quality bit.

Compared with prior art, advantage of the present invention is as follows:

The present invention provides a communication test method and system oriented to the sampled value interface, and further proposes the second test content and the third test content included in the SV subscription test on the basis of the first test content of the existing SV release test , compared with the prior art, a communication test method and system oriented to the sampling value interface provided by the present invention provides a comprehensive and systematic SV test content, covering international and domestic standards for SV testing, and covering domestic All the indicators of SV engineering application make the application of SV in domestic engineering sites of great significance.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

1 is a schematic diagram of building a SV release test platform for a communication test method oriented to a sampling value interface provided by an embodiment of the present invention;

2 is a schematic diagram of building a SV subscription test platform for a communication test method oriented to a sampled value interface provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a communication test system oriented to a sampled value interface provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

An embodiment of the present invention provides a communication testing method oriented to a sampling value interface, including SV publishing testing and SV subscribing testing. Wherein, the SV release test includes: verifying the first test content; the SV release test further includes verifying at least one of the second test content:

Verify the consistency of SV messages, verify the consistency of SV messages sent by all point-to-point ports, verify the correct identification of SV synchronization flags, and verify the dispersion of SV messages;

The SV subscription test further includes verifying at least one of the third test contents:

Verify SV subscription parameters, verify SV interrupt processing mechanism, verify SV quality exception processing mechanism, verify SV frame loss and out-of-sequence processing mechanism, verify SV out-of-sync processing mechanism, verify SV rated delay exception processing mechanism, verify SV jitter processing mechanism, Verify the SV receiving platen function, verify the dual AD exception handling mechanism, and verify the SV maintenance handling mechanism.

Among them, verifying the first test content may include: verifying the physical layer interface, verifying that the link layer format meets the requirements of IEC61850-9-2, verifying the SV message application layer format when the sampling rate is 80 points/cycle, and verifying that the sampling rate is 256 SV message application layer format at point/cycle, verify application service data unit data set format, verify completeness of SV message when sampling rate is 80 points/cycle, verify completeness of SV message when sampling rate is 256 points/cycle, Verify the increment and reset method of the SV message sampling counter, verify the consistency between the SV output and the analog input; verify the resend time of the SV message after the protection device is restarted, and verify the transmission of the SV maintenance quality bit.

It should be noted that, in the communication test method oriented to the sampling value interface provided by the embodiment of the present invention, the SV release test is performed according to the construction system shown in Figure 1, wherein the test software is installed in the PC, and the test software is controlled by The test hardware receives the SV message issued by the protection device under test, analyzes the SV message to complete the data verification, and gives the test result. The analog generator in the test system is used to provide current and voltage signals to the protection device under test.

It should be noted that the test cases defined in the IEC61850-10 part use Svp (SVpublish release test cases) and Svs (SVsubscribe subscription test cases) as prefixes, while the test cases in the embodiments of the present invention use Svp_Ex and Svs_Ex as prefixes . That is, the test cases included in the first test content use Svp and Svs as prefixes, the test cases included in the second test content and the third test content use Svp_Ex and Svs_Ex as prefixes, and the SV release test is designed for the merged unit , the SV subscription test is designed for protection devices, that is, the device under test during the SV release test is a merging unit. Among them, the main content of the SV release test and the corresponding implementation process using the system shown in Figure 1 can be as follows:

1. Verify the main implementation process of the first test content:

(1) Svp1: Verify the physical layer interface

Test purpose: Verify that the physical layer interface is 100Base-FX or 100Base-TX.

Test method: Check whether the physical interface configured by the device under test meets the above requirements and can send SV messages.

It should be noted that 100Base-FX is a 100Mbps Ethernet standard implemented on optical fiber, where F indicates optical fiber, and the IEEE standard is 802.3u. And the connected connector is LC fiber optic connector (Lucent connector), ST fiber optic connector (StraightTip) or MT-RJ fiber optic connector; 100Base-TX is connected with RJ45 fiber optic connector.

(2) Svp2: Verify that the link layer format meets the requirements of IEC61850-9-2

Test purpose: To verify that the link layer format of the SV message complies with the requirements of the IEC61850-9-2 specification.

Test method: analyze the SV message and verify that the SV message meets the requirements of IEC61850-9-2. The detection fields include MAC address, TPID (TagProtocolIdentifier, tag protocol identification), VLAN (VirtualLocalAreaNetwork, virtual local area network), Ethertype, APPID (applicationidentification, application ID), Reseved1, Reseved2.

Among them, EtherType is a field in the Ethernet frame, which is used to indicate the protocol applied to the frame data field.

(3) Svp3: Verify the application layer format of the sampling value message when the sampling rate is 80 points/cycle

Test purpose: Verify that the application layer format is 1 APDU (ApplicationProtocolDataUnit, application protocol data unit) containing 1 ASDU (ApplicationServiceDataUnit, application service data unit).

Test method: Parse the SV message. One APDU should contain one ASDU. The detection fields include noofASDU (number of ASDUs), svID (sampling value ID), SmpCnt (sampling counter), confRev (version number), SmpSynch (synchronization identification bit ).

(4) Svp4: Verify the application layer format of the sampling value message when the sampling rate is 256 points/cycle

Test purpose: To verify that the application layer format is 1 APDU including 8 ASDUs.

Test method: analyze the SV message, 1 APDU should contain 8 ASDUs, and the detection fields include noofASDU (number of ASDUs), svID (sampling value ID), SmpCnt (sampling counter), confRev (version number), SmpSynch (synchronization identification bit ).

(5) Svp5: Verify the ASDU dataset format

Test purpose: To verify that the ASDU data set contains the instantaneous value of the analog quantity and its quality.

Test method: analyze the SV message, the ASDU data set contains the instantaneous value of the analog quantity and its quality. The instantaneous value of unsupported channels is 0 and the sampling value quality is invalid (Invalid=TURE).

(6) Svp6: Verify the integrity of the message with a sampling rate of 80 points/cycle sampling value

Test purpose: To verify the frame loss index of sampled packet data.

Test method: record SV messages for one minute, and count the number of received SV message frames to meet the requirement of 240000±1 frames.

(7) Svp7: verify the integrity of the SV message with a sampling rate of 256 points/cycle

Test purpose: To verify the frame loss index of sampled packet data.

Test method: record SV messages for one minute, count the number of received SV message frames, and meet the requirement of 96000±1 frames.

(8) Svp8: verify the increment and reset method of the sampling value message SmpCnt (sampling counter)

Test purpose: To verify that SmpCnt should be incremented and reset correctly regardless of whether the device under test is synchronized or not.

Test method: In the synchronous and out-of-synchronous states, check the sampling counter SmpCnt of the SV message respectively. For 80 points/cycle, the counting period is 0-3999, and for 256 points/cycle, the counting period is 0-12799.

(9) Svp9: Verify the consistency between the sampled value output and the analog input

Test purpose: The input analog value and the output sampling value should be consistent.

Test method: apply voltage and current through the analog generator, and check that the input analog signal is consistent with the output sampled value (without examining the accuracy of the device under test).

(10) Svp10: Verify the resend time of the sampling value message after the device under test is restarted

Test purpose: The resend time of the sampling value message should be consistent with the manufacturer's statement.

Test method: restart the device under test, and record the receiving time of the first frame sampling value message of the device under test, which should be within the time range declared by the manufacturer.

(11) Svp11: Verify the sending of the SV overhaul quality bit (Test)

Test purpose: To verify the inspection mode, the data quality of the sampling value message should carry the inspection bit.

Test method: put into the inspection platen of the device under test, restart the device under test, and check the data quality of the sampling value message should carry the inspection bit (Test=TURE).

2. The main implementation process of verifying the content of the second test is as follows:

(1) Svp_E1: verify the consistency of the sampling value message

Test purpose: To verify that the actual sampling value configuration of the device under test is consistent with the configuration file.

Test method: parse the SV message, compare the message and configuration file parameters, and check the fields including multicast MAC address, VLANID, VLAN priority, APPID, SVID, and confRev.

(2) Svp_E2: Verify the consistency of the sampling value messages sent by all point-to-point ports

Test purpose: To verify that the same group of sampling value packets of all point-to-point ports should be sent at the same time, and the contents of the packets should be completely consistent except for the source MAC address.

Test method: restart the device under test, record the sampling value messages of all point-to-point ports, the message content of the same serial number message should be completely consistent except for the source MAC address, and the arrival time deviation of each port message should be less than 10us.

(3) Svp_E3: Verify the correct identification of the sampling value synchronization flag (SmpSynch)

Test purpose: SmpSynch should correctly identify the out-of-sync and sync status of the device under test.

Test method: Check the synchronization of the device under test with the external synchronization signal. If the synchronization signal is lost, the device under test should use the internal clock for timekeeping. When the timekeeping accuracy meets the requirements, SmpSynch will be set to True, otherwise SmpSynch will be set to FALSE. If a sync pulse is present, SmpSynch should be set to True.

(4) Svp_E4: Verify the dispersion of the sampling value message

Test purpose: To verify the sampling value messages output by all point-to-point ports, and the dispersion does not exceed 10us.

Test method: Record the sampling value messages of all point-to-point ports, and count the difference between the sampling value message interval time and the standard interval time to obtain the distribution range of the sampling value dispersion. It is required that the sampling message release discrete value does not exceed 10us.

The embodiment of the present invention adopts the test system built based on Figure 2 to carry out the SV subscription test, wherein the test software is installed in the PC, and the test software completes the output of SV and GOOSE by controlling the tester, and simultaneously monitors the device under test through the network port of the PC. MMS information to assist in the completion of SV subscription functions and data verification.

3. The main implementation process of verifying the content of the third test is as follows:

(1) Svs_E1: Verify SV subscription parameters

Test purpose: The protection device under test should strictly check whether the multicast MAC address, AppID, SVID, ConfRev, number of data set channels and other parameters match.

Test method: Simulate the inconsistency of parameters such as MAC, AppID, SVID, ConfRev, and the number of data set channels of the SV message, and verify the receiving status of the protection device.

(2) Svs_E2: Verify SV interrupt processing mechanism

Test purpose: SV reception interruption should give a clear alarm and block the relevant protection. After the SV is interrupted, the sampling data of this channel of the protection device is cleared. After the SV communication is restored, the alarm signal of the protective device should return automatically, and the relevant functions should return to normal.

Test method: Simulate SV communication interruption (disconnect the optical fiber or set inconsistent SV parameters), check whether the alarm information of the protection device and related sampling data are cleared; simulate the fault state, and verify whether the protection device blocks the relevant protection functions. Restore SV communication, check whether the alarm signal of the protection device returns automatically, and whether the function of the relevant protection device returns to normal.

(3) Svs_E3: Verify SV quality exception handling mechanism

Test purpose: When the quality of SV reception is abnormal (invalid, questionable), a clear alarm should be given and relevant protections should be blocked. After the SV alarm, the protection device clears the sampling data of this channel. After the SV communication is restored, the alarm signal of the protective device should return automatically, and the relevant functions should return to normal.

Test method: Simulate sending abnormal quality (invalid, questionable) SV messages, check whether the alarm information of the protection device and related sampling data are cleared; simulate the fault state, and verify whether the protection device locks the relevant protection functions. Restore SV communication, check whether the alarm signal of the protection device returns automatically, and whether the function of the relevant protection device returns to normal.

(4) Svs_E4: Verify SV frame loss and out-of-sequence processing mechanism

Purpose of the test: When frame loss or sequence error occurs in SV reception, a clear alarm should be given and relevant protections should be blocked. After the SV alarm, the protection device clears the sampling data of this channel. After the SV communication is restored, the alarm signal of the protective device should return automatically, and the relevant functions should return to normal.

Test method: Simulate sending frame loss and out-of-sequence sampling value messages, check whether the alarm information of the protection device and related sampling data are cleared; simulate the fault state, and verify whether the protection device locks the relevant protection functions. Restore SV communication, check whether the alarm signal of the protection device returns automatically, and whether the function of the relevant protection device returns to normal.

(5) Svs_E5: Verify SV out-of-sync processing mechanism

Test purpose: to verify the processing mechanism of the protection device when the SV message synchronization flag (SmpSynch=FLASE) is detected. For the protection device (working mode of direct mining), the protection device operates normally without alarm, and for the protection device (working mode of network mining), it should alarm correctly. After the SV communication is restored, the alarm signal of the protective device shall return automatically.

Test method: Simulate sending the sampling value message of the synchronization flag (SmpSynch=FLASE), and check the corresponding alarm information. After the SV communication is restored, the alarm signal of the protective device shall return automatically.

(6) Svs_E6: Verify SV rated delay exception handling mechanism

Test purpose: When the rated delay field in the SV message changes or exceeds the limit, the protection device (direct mining working mode) should give a clear alarm and block the relevant protection functions.

Test method: Simulate the change of the rated delay field of the SV message or greater than 2ms, check the alarm information of the protection device; simulate the fault state, and verify whether the protection device blocks the relevant protection functions.

(7) Svs_E7: Verify SV jitter processing mechanism

Test purpose: When the jitter of the SV message transmission interval exceeds the limit, the protection device (direct mining working mode) should give a clear alarm and block the relevant protection functions. When the SV communication is restored, the alarm signal of the protection device shall return automatically, and the relevant functions shall return to normal.

Test method: simulate SV transmission interval jitter, when the jitter time is not greater than the allowable value of the protection device (default 10us), check that the performance of the protection device should not be affected; when the jitter time is greater than the allowable value of the protection device (default 10us), check the alarm information of the protection device , simulate the fault state, and verify whether the relevant protection functions are blocked; restore the SV communication, and check whether the alarm signal of the protection device returns automatically and whether the function of the relevant protection device returns to normal.

(8) Svs_E8: Verify the SV receiving platen function

Test purpose: The SV receiving pressure plate should be set according to the number of merging units connected. When the SV receiving pressure plate exits, the SV of this channel will be displayed as zero, and will not participate in the protection-related logic. The SV message interruption, abnormality, and maintenance inconsistency of this channel will not generate an alarm. .

Test method: exit one SV receiving pressure plate, check whether the SV value of this road is zero; simulate the SV link interruption, abnormality and inconsistent maintenance of this road to check whether the protection has an alarm; simulate the SV of this road reaching the threshold of the protection device action, and check the protection action behavior.

(9) Svs_E9: Verify the dual AD (Analog/Digital) exception handling mechanism

Test purpose: When the SV double AD data is inconsistent, the protection device should not malfunction; when the SV communication is restored, the relevant functions should return to normal.

Test method: Analog SV message A/D (AnalogtoDigitalConverter, analog-to-digital converter) data continuous abnormality, including current sampling value continuous, discontinuous distortion amplification, voltage sampling value continuous, discontinuous distortion reduction, etc., and the abnormal data value reaches The action threshold of the protection device, the other A/D sampling data is normal, check the action behavior of the protection device; simulate the A/D data quality of one line is abnormal, the other A/D sampling data is normal, and the data value reaches the action threshold of the protection device to check the action behavior of the protection device ;Resume SV communication, check whether related functions return to normal.

(10) Svs_E10: Verify SV overhaul processing mechanism

Test purpose: To check the protection device, the Test bit in the received SV message should be compared with the maintenance status of the protection device itself. Only when the two are consistent, the signal is used for the protection logic, otherwise it should be processed according to the abnormal sampling of the relevant channel .

Test method: According to the different maintenance combination methods shown in Table 1, verify the protection processing mechanism.

Table 1 Different maintenance combinations

It should be noted that, in the sampled value interface-oriented communication test method provided by the embodiment of the present invention, there is no order among the detailed verification contents of the first test content, the second test content, and the third test content. The above restrictions, and each detailed test content is independent of each other.

The embodiment of the present invention provides a communication test method oriented to the sampled value interface, and further proposes the second test content and the third test content included in the SV subscription test on the basis of the first test content of the existing SV release test , compared with the prior art, a communication test method oriented to the sampling value interface provided by the embodiment of the present invention provides a comprehensive and systematic SV test content, covering international and domestic standards for SV testing, and covering domestic All the indicators of SV engineering application make the application of SV in domestic engineering sites of great significance.

Corresponding to the embodiment of the above method, the embodiment of the present invention also provides a communication test system oriented to the sampled value interface. Please refer to FIG. 1 which shows a communication test system oriented to the sampled value interface provided by the embodiment of the present invention , can include SV release test module 11 and SV subscription test module 12, wherein, SV release test module 11 includes: a first verification unit 21; SV release test module 11 further includes at least one verification content in the second verification unit 22 :

Verify the consistency of SV messages, verify the consistency of SV messages sent by all point-to-point ports, verify the correct identification of SV synchronization flags, and verify the dispersion of SV messages;

The SV subscription test module 12 further includes at least one verification content in the third verification unit 31:

Verify SV subscription parameters, verify SV interrupt processing mechanism, verify SV quality exception processing mechanism, verify SV frame loss and out-of-sequence processing mechanism, verify SV out-of-sync processing mechanism, verify SV rated delay exception processing mechanism, verify SV jitter processing mechanism, Verify the SV receiving platen function, verify the dual AD exception handling mechanism, and verify the SV maintenance handling mechanism.

Wherein, the first verification unit 21 may include:

Verify the physical layer interface, verify that the link layer format meets the requirements of IEC61850-9-2, verify the SV message application layer format when the sampling rate is 80 points/cycle, and verify the SV message application layer format when the sampling rate is 256 points/cycle , verify the format of the application service data unit data set, verify the completeness of the SV message when the sampling rate is 80 points/cycle, verify the completeness of the SV message when the sampling rate is 256 points/cycle, and verify the increment and reset of the SV message sampling counter method, verify the consistency of SV output and analog input; verify the resend time of SV message after the protection device is restarted, and verify the transmission of SV maintenance quality bit.

The embodiment of the present invention provides a communication test system oriented to the sampling value interface, and further proposes the second test content and the third test content included in the SV subscription test on the basis of the first test content of the existing SV release test , compared with the prior art, a sampled value interface-oriented communication test system provided by the embodiment of the present invention provides a comprehensive and systematic SV test content, covering international and domestic standards for SV testing, and covering domestic All the indicators of SV engineering application make the application of SV in domestic engineering sites of great significance.

Finally, it should also be noted that in this text, relational terms such as first and second etc. are only used to distinguish one entity or operation from another, and do not necessarily require or imply that these entities or operations, any such actual relationship or order exists. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. A communication test method oriented to a sampled value interface, comprising an SV release test and an SV subscription test, wherein the SV release test includes: verifying the first test content; it is characterized in that the SV release test further includes verification At least one of the second test content: Verify the consistency of the SV message, verify the consistency of the SV message sent by all point-to-point ports, verify the correct identification of the SV synchronization flag, and verify the dispersion of the SV message; The SV subscription test further includes verifying at least one of the third test content: Verify the SV subscription parameters, verify the SV interrupt processing mechanism, verify the SV quality exception processing mechanism, verify the SV frame loss and out-of-sequence processing mechanism, verify the SV out-of-sync processing mechanism, and verify the SV rated Delay exception processing mechanism, verification of the SV jitter processing mechanism, verification of the SV receiving platen function, verification of the dual AD exception processing mechanism, and verification of the SV maintenance processing mechanism. 2. The communication test method according to claim 1, wherein the verification of the first test content comprises: Verify the physical layer interface, verify that the link layer format meets the requirements of IEC61850-9-2, verify the SV message application layer format when the sampling rate is 80 points/cycle, and verify the SV report when the sampling rate is 256 points/cycle format of the application layer, verify the format of the application service data unit data set, verify the completeness of the SV message when the sampling rate is 80 points/cycle, verify the completeness of the SV message when the sampling rate is 256 points/cycle, and verify the completeness of the SV message when the sampling rate is 256 points/cycle. Describe the increment and reset method of the SV message sampling counter, verify the consistency between the SV output and the analog input; verify the resend time of the SV message after the restart of the protection device, and verify the transmission of the SV maintenance quality bit. 3. A communication test system facing the sampled value interface, comprising an SV release test module and an SV subscription test module, wherein the SV release test module includes: a first verification unit; it is characterized in that the SV release test module also Further including at least one verification content in the second verification unit: Verify the consistency of the SV message, verify the consistency of the SV message sent by all point-to-point ports, verify the correct identification of the SV synchronization flag, and verify the dispersion of the SV message; The SV subscription test module further includes at least one verification content in the third test unit: Verify the SV subscription parameters, verify the SV interrupt processing mechanism, verify the SV quality exception processing mechanism, verify the SV frame loss and out-of-sequence processing mechanism, verify the SV out-of-sync processing mechanism, and verify the SV rated Delay exception processing mechanism, verification of the SV jitter processing mechanism, verification of the SV receiving platen function, verification of the dual AD exception processing mechanism, and verification of the SV maintenance processing mechanism. 4. The communication test system according to claim 3, wherein the first verification unit comprises: Verify the physical layer interface, verify that the link layer format meets the requirements of IEC61850-9-2, verify the SV message application layer format when the sampling rate is 80 points/cycle, and verify the SV report when the sampling rate is 256 points/cycle format of the application layer, verify the format of the application service data unit data set, verify the completeness of the SV message when the sampling rate is 80 points/cycle, verify the completeness of the SV message when the sampling rate is 256 points/cycle, and verify the completeness of the SV message when the sampling rate is 256 points/cycle. Describe the increment and reset method of the SV message sampling counter, verify the consistency between the SV output and the analog input; verify the resend time of the SV message after the restart of the protection device, and verify the transmission of the SV maintenance quality bit.