CN105759150A - Test system and method for transformer substation secondary device prefabricated cabin - Google Patents

Abstract

The invention discloses a test system and method for a substation secondary equipment prefabricated cabin. The system includes an integrated test platform, an optical fiber interface, a test workstation, a switch, an IEC61850 network message analyzer, and a tested substation secondary equipment prefabricated cabin , the integrated test platform is connected to the prefabricated cabin of the secondary equipment of the substation under test through the optical fiber interface. Connect to a network packet analyzer. The invention can accurately, reliably and quickly realize the high-efficiency test of the prefabricated cabin of the secondary equipment of the substation, solve the problems of the small internal volume of the prefabricated cabin of the secondary equipment and lack of testing methods, and meet the large-scale construction and testing requirements of the modular construction substation , which improves the test efficiency and has a good application prospect.

Description

A testing system and method for substation secondary equipment prefabricated cabin

technical field

The invention relates to a testing system and method for a substation secondary equipment prefabricated cabin, belonging to the technical field of intelligent substation modular construction.

Background technique

The modular construction of substations is one of the important models for the construction of a new generation of smart substations. By adopting prefabricated combined equipment, the entire set of secondary equipment can be integrated into the prefabricated cabin by the manufacturer, maximizing factory processing and completing related configurations in the factory. , wiring, commissioning and other work, the secondary equipment prefabricated cabin is delivered to the substation site as a whole, and is arranged near the power distribution device to reduce on-site wiring, reduce design and construction workload, effectively improve process quality, shorten construction period, and improve substation construction. efficiency.

At present, the commissioning of the prefabricated cabin of secondary equipment is usually divided into in-factory in-plant commissioning and on-site commissioning. In-plant in-house commissioning means that before the secondary equipment is transported to the substation site for installation, the equipment manufacturer or a qualified third-party verification agency conducts intelligent Functional and performance verification tests of secondary equipment. Usually, the in-plant commissioning of secondary equipment is connected according to the actual networking of the substation, and various tests such as sampling, equipment function verification, and interoperability verification are performed. The main contents of the joint debugging in the factory include the whole station configuration inspection, SCD file normative inspection, sampling value inspection, equipment function verification, interoperability verification test, etc.

However, due to the high integration of the prefabricated cabin of the secondary equipment, the internal space is narrow, and the cabin test is difficult. Compared with the conventional substation debugging method, there is a big difference, and the advantages of the intelligent station have not been fully utilized. Therefore, , it is necessary to give full play to the advantages of smart substations, design a debugging method that conforms to the prefabricated cabin of the secondary equipment, and improve its debugging efficiency, which is an urgent problem to be solved at present.

Contents of the invention

The purpose of the present invention is to overcome the problems that the existing secondary equipment prefabricated cabin is highly integrated, the internal space is narrow, the test in the cabin is difficult, and there is a big difference compared with the debugging method of the conventional substation. The test system and method for substation secondary equipment prefabricated cabins of the present invention can accurately, reliably and quickly realize efficient testing of substation secondary equipment prefabricated cabins, and solve the problem of small internal volume of secondary equipment prefabricated cabins and lack of testing methods It meets the test requirements for large-scale promotion of modular construction of smart substations, improves test efficiency, and has a good application prospect.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A test system for a substation secondary equipment prefabricated cabin, characterized in that it includes an integrated test platform, an optical fiber interface, a test workstation, a switch, an IEC61850 network message analyzer and a substation secondary equipment prefabricated cabin,

The secondary equipment prefabricated cabin of the substation under test is the measured object, and receives voltage signals, current signals, primary equipment status signals and external control signals required for secondary equipment operation through its internal fiber interface cabinet;

The integrated test platform, under the control of the test workstation, simulates the current, voltage and primary equipment status signals of the grid operation, provides a simulated operating environment for the prefabricated cabin of the secondary equipment of the substation under test through the optical fiber interface, and receives the measured data through the optical fiber interface. Feedback data of substation secondary equipment prefabrication cabin;

The optical fiber interface is connected to the optical fiber interface cabinet in the prefabricated cabin of the secondary equipment of the substation under test, and inputs the signal of the integrated test platform to the secondary equipment in the prefabricated cabin of the secondary equipment of the substation under test;

The test workstation is used to send data simulation instructions to the integrated test platform, and send start and stop instructions to the IEC61850 network packet analyzer, configure the test strategy of the test system, receive the test data fed back by the integrated test platform, and according to the test strategy and feedback data, and analyze the test results;

The IEC61850 network message analyzer is used to receive the start-stop command of the test workstation, record the network message of the switch through the network monitoring mode, analyze the network message and generate an analysis report, and feed back the analysis report data to the test workstation;

The switch centrally sends all kinds of network messages in the prefabricated cabin of the secondary equipment of the substation under test to the IEC61850 network message analyzer;

The integrated test platform is connected to the prefabricated cabin of the secondary equipment of the substation under test through an optical fiber interface, and the prefabricated cabin of the secondary equipment of the substation under test is connected to the IEC61850 network packet analyzer through a switch, and the integrated test platform is also Connect with the IEC61850 network packet analyzer through the test workstation.

The aforementioned test system for substation secondary equipment prefabricated cabin is characterized in that: the analysis report is an XML file.

The aforementioned test system for the substation secondary equipment prefabricated cabin is characterized in that: the integrated test platform is controlled by the test workstation to simulate the current, voltage and primary equipment status signals of the power grid operation, and its signal simulation scale can be Expand or cut according to the actual situation.

Based on the above-mentioned test method for the test system of the substation secondary equipment prefabricated cabin, it is characterized in that: comprising the following steps,

Step (1), connect the integrated test platform, optical fiber interface, test workstation, switch, IEC61850 network packet analyzer and the prefabricated cabin of the secondary equipment of the substation under test, and the test workstation executes its test content;

Step (2), if the test content of the test workstation cannot be completed, according to the analysis report of the IEC61850 network packet analyzer, the test workstation obtains the problematic equipment in the prefabrication of the secondary equipment of the substation under test, and performs single-device inspection on the problematic equipment, Deal with problematic equipment and re-prepare its performance tests;

Step (3), after completing the test content of the test workstation, the test workstation performs the performance test of the entire test system, and the IEC61850 network packet analyzer generates an analysis report and sends it to the test workstation, which then processes the analysis report and outputs the test results ,complete test.

The aforementioned test method for the test system of the substation secondary equipment prefabricated cabin is characterized in that: step (1), the test workstation executes its test content, including GOOSE message normative test, SV message normative test, input And output virtual terminal verification and relay protection function test.

The aforementioned test method for the test system of the substation secondary equipment prefabricated cabin is characterized in that: the GOOSE message normative test utilizes message analysis software to check the GOOSE report produced by the secondary equipment under test with GOOSE sending capability. The completeness, correctness and standardization of the text;

In the SV message normative test, the test workstation sends SV messages conforming to the DL/T860 standard to protection equipment, measurement and control units and other secondary equipment with SV acceptance capabilities through its internal reference merging unit or merging unit emulator, Check the SV receiving capability of the device under test, and check the accuracy of the sampling value;

The verification of the input and output virtual terminals includes the configuration file and version of the verification device; the data model; the correctness of the device under test to send and receive GOOSE displacement; the correctness of the device under test to receive SV sampling; one of the above verifications fails, Then the verification test of the input and output virtual terminals is unqualified;

The relay protection function test includes the function verification of the relay protection device and the setting value verification of various protections.

The aforementioned test method for the test system of the substation secondary equipment prefabricated cabin is characterized in that: step (2), performing single-device inspection on the problematic equipment, including single-device consistency test and communication function inspection,

The single device consistency test includes whether the device configuration file and version are valid; whether the data model is correct; whether the model and mapping method are normal;

The communication function inspection includes whether the device sends and receives information normally; the data transmission is correct; whether the communication function is normal; whether there is interruption in the communication process.

The aforementioned test method for the test system of the substation secondary equipment prefabricated cabin is characterized in that: step (3), the test workstation performs the performance test of the entire test system, including the information interaction test between devices, the entire set of relay protection behaviors and Time testing, automated system performance testing, avalanche testing, and network performance testing.

The aforementioned test method for the test system of the substation secondary equipment prefabricated cabin is characterized in that: the information interaction test between the devices includes verifying the start-up failure, locking and reclosing, and inter-trip information interaction responses between relay protection devices. Correctness; verify the correctness of the five-prevention interlocking signal interaction of the monitoring system;

The whole set of behavior and time test of the relay protection includes verifying the correctness of the functional cooperation between the protection devices and the correctness of the action sequence during the system failure process; testing the time from the start of the failure to the issuance of the relay protection trip command for the entire process , as the whole group action time of relay protection;

The performance test of the automated system includes telemetry, remote signaling, and remote control function correctness verification, telemetry accuracy testing, and remote signaling SOE time testing; system response time: the time when telemetry changes are transmitted to the station control layer, and state quantity changes are transmitted to the station control layer Layer time, remote control execution time; system load rate index inspection: CPU normal load rate, CPU load rate under accident, normal network load rate, network load rate under accident;

The avalanche test is performed under the set failure mode to obtain the network load rate, CPU load rate, event sequence record, telemetry, remote signaling, remote adjustment, and remote execution;

The network performance test includes a GOOSE message network performance test. Under a given network load flow, the correctness and response time of tripping and closing between the protection measurement and control equipment and the intelligent terminal are tested, and a certain two in the network are simulated. In the case of a problem with the secondary device and wrongly sending GOOSE messages, test the response and performance of other secondary devices in the network;

Sampling value network performance test, under different background traffic, test whether there is packet loss or wrong sequence in the sampling value of SV message, and test the sampling accuracy of measurement, control and metering functions;

Network performance test of the station control layer, under different network traffic, test the communication performance between the protection measurement and control equipment and the monitoring background, including the delay of MMS messages, the packet loss rate of protection or remote signaling events MMS, and the commands issued by the monitoring background , to protect the correctness and response time of the command response of the measurement and control device.

The beneficial effects of the present invention are: the testing system and method for the substation secondary equipment prefabricated cabin of the present invention can accurately, reliably and quickly realize the efficient testing of the substation secondary equipment prefabricated cabin, and solve the problem of secondary equipment prefabricated cabin The problem of small internal volume and lack of test methods meets the large-scale construction test requirements of modular construction substations, improves test efficiency, and has a good application prospect.

Description of drawings

Fig. 1 is a system block diagram of a test system for a substation secondary equipment prefabricated cabin according to the present invention.

Fig. 2 is a flow chart of the testing method for the substation secondary equipment prefabricated cabin of the present invention.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

The test system and method for substation secondary equipment prefabricated cabins of the present invention can accurately, reliably and quickly realize efficient testing of substation secondary equipment prefabricated cabins, and solve the problem of small internal volume of secondary equipment prefabricated cabins and lack of testing methods The problem meets the test requirements for the large-scale promotion of modular construction of smart substations, and improves the test efficiency, as shown in Figure 1, including

Including integrated test platform, optical fiber interface, test workstation, switch, IEC61850 network packet analyzer and prefabricated cabin for secondary equipment of substation under test,

The secondary equipment prefabricated cabin of the substation under test is the measured object, and receives voltage signals, current signals, primary equipment status signals and external control signals required for secondary equipment operation through its internal fiber interface cabinet;

The integrated test platform, under the control of the test workstation, simulates the current, voltage and primary equipment status signals of the grid operation, provides a simulated operating environment for the prefabricated cabin of the secondary equipment of the substation under test through the optical fiber interface, and receives the measured data through the optical fiber interface. Feedback data of substation secondary equipment prefabrication cabin;

The optical fiber interface is connected to the optical fiber interface cabinet in the prefabricated cabin of the secondary equipment of the substation under test, and inputs the signal of the integrated test platform to the secondary equipment in the prefabricated cabin of the secondary equipment of the substation under test;

The test workstation is used to send data simulation instructions to the integrated test platform, and send start and stop instructions to the IEC61850 network packet analyzer, configure the test strategy of the test system, receive the test data fed back by the integrated test platform, and according to the test strategy and feedback data, and analyze the test results;

The IEC61850 network message analyzer is used to receive the start-stop command of the test workstation, record the network message of the switch through the network monitoring mode, analyze the network message and generate an analysis report, and feed back the analysis report data to the test workstation;

The switch centrally sends all kinds of network messages in the prefabricated cabin of the secondary equipment of the substation under test to the IEC61850 network message analyzer;

The integrated test platform is connected to the prefabricated cabin of the secondary equipment of the substation under test through an optical fiber interface, and the prefabricated cabin of the secondary equipment of the substation under test is connected to the IEC61850 network packet analyzer through a switch, and the integrated test platform is also Connect with the IEC61850 network packet analyzer through the test workstation.

The analysis report is an XML file.

The integrated test platform, controlled by the test workstation, simulates the current, voltage and primary equipment status signals of the grid operation, and its signal simulation scale can be expanded or reduced according to actual conditions.

As shown in Figure 2, the test method based on the above-mentioned test system for the substation secondary equipment prefabricated cabin includes the following steps,

Step (1), connect the integrated test platform, optical fiber interface, test workstation, switch, IEC61850 network packet analyzer and the prefabricated cabin of the secondary equipment of the substation under test (you can choose optical fiber, network cable or wire for connection), test The workstation executes its test content, wherein the test workstation executes its test content, including GOOSE message normative test, SV message normative test, input and output virtual terminal verification and relay protection function test.

The aforementioned test method for the test system of the substation secondary equipment prefabricated cabin is characterized in that: the GOOSE message normative test utilizes message analysis software to check the GOOSE report produced by the secondary equipment under test with GOOSE sending capability. The completeness, correctness and standardization of the text;

In the SV message normative test, the test workstation sends SV messages conforming to the DL/T860 standard to protection equipment, measurement and control units and other secondary equipment with SV acceptance capabilities through its internal reference merging unit or merging unit emulator, Check the SV receiving capability of the device under test, and check the accuracy of the sampling value;

The verification of the input and output virtual terminals includes the configuration file and version of the verification device; the data model; the correctness of the device under test to send and receive GOOSE displacement; the correctness of the device under test to receive SV sampling; one of the above verifications fails, Then the verification test of the input and output virtual terminals is unqualified;

The relay protection function test includes the function verification of the relay protection device and the fixed value verification of various protections;

Step (2), if the test content of the test workstation cannot be completed, according to the analysis report of the IEC61850 network packet analyzer, the test workstation obtains the problematic equipment in the prefabrication of the secondary equipment of the substation under test, and performs single-device inspection on the problematic equipment, Deal with the problematic device and re-prepare its performance test, in which a single-device inspection is performed on the problematic device, including a single-device consistency test and communication function inspection,

The single device consistency test includes whether the device configuration file and version are valid; whether the data model is correct; whether the model and mapping method are normal;

The communication function inspection includes whether the device sends and receives information normally; the data transmission is correct; whether the communication function is normal or not; whether there is an interruption in the communication process;

Step (3), after completing the test content of the test workstation, the test workstation performs the performance test of the entire test system, and the IEC61850 network packet analyzer generates an analysis report and sends it to the test workstation, which then processes the analysis report and outputs the test results , to complete the test, in which the test workstation executes the performance test of the entire test system, including the information interaction test between devices, the entire group behavior and time test of relay protection, the automation system performance test, the avalanche test and the network performance test.

The aforementioned test method for the test system of the substation secondary equipment prefabricated cabin is characterized in that: the information interaction test between the devices includes verifying the start-up failure, locking and reclosing, and inter-trip information interaction responses between relay protection devices. Correctness; verify the correctness of the five-prevention interlocking signal interaction of the monitoring system;

The whole set of behavior and time test of the relay protection includes verifying the correctness of the functional training between the protection devices and the correctness of the action sequence during the system fault process; testing the time from the start of the fault to the issuance of the relay protection trip command for the entire process , as the whole group action time of relay protection;

The performance test of the automated system includes telemetry, remote signaling, and remote control function correctness verification, telemetry accuracy testing, and remote signaling SOE time testing; system response time: the time when telemetry changes are transmitted to the station control layer, and state quantity changes are transmitted to the station control layer Layer time, remote control execution time; system load rate index inspection: CPU normal load rate, CPU load rate under accident, normal network load rate, network load rate under accident;

The avalanche test is performed under the set failure mode to obtain the network load rate, CPU load rate, event sequence record, telemetry, remote signaling, remote adjustment, and remote execution;

The network performance test includes a GOOSE message network performance test. Under a given network load flow, the correctness and response time of tripping and closing between the protection measurement and control equipment and the intelligent terminal are tested, and a certain two in the network are simulated. In the case of a problem with the secondary device and wrongly sending GOOSE messages, test the response and performance of other secondary devices in the network;

Sampling value network performance test, under different background traffic, test whether there is packet loss or wrong sequence in the sampling value of SV message, and test the sampling accuracy of measurement, control and metering functions;

Network performance test of the station control layer, under different network traffic, test the communication performance between the protection measurement and control equipment and the monitoring background, including the delay of MMS messages, the packet loss rate of protection or remote signaling events MMS, and the commands issued by the monitoring background , to protect the correctness and response time of the command response of the measurement and control device.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements all fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (9)

1. the test system for substation secondary device prefabricated cabin, it is characterised in that: include integrated testing platform, optical fiber interface, testing workstation, switch, IEC61850 network message analyser and tested substation secondary device prefabricated cabin,

Described tested substation secondary device prefabricated cabin is measurand, receives the voltage signal needed for secondary device runs, current signal, primary equipment status signal and external control signal by its internal fine interface cabinet；

Described integrated testing platform, the control of tested person work station, electric current, voltage and the primary equipment status signal that simulated grid runs, there is provided simulation running environment to tested substation secondary device prefabricated cabin by optical fiber interface, received the feedback data of tested substation secondary device prefabricated cabin simultaneously by optical fiber interface；

Described optical fiber interface, is connected with the optical fiber interface cabinet in tested substation secondary device prefabricated cabin, and the signal of integrated testing platform is inputted the secondary device to tested substation secondary device prefabricated cabin；

Described testing workstation, for sending data simulation instruction to integrated testing platform, and send start and stop instruction to IEC61850 network message analyser, the Test Strategy of configuration testing system, receive the test data of integrated testing platform feedback, according to Test Strategy and feedback data, analyze and obtain test result；

Described IEC61850 network message analyser, for receiving the start and stop instruction of testing workstation, by the network message of network monitoring mode record switch, analyzes network message and generates analysis report, and by analysis report data feedback to testing workstation；

Described switch, concentrates the disparate networks message in tested substation secondary device prefabricated cabin and sends to IEC61850 network message analyser；

Described integrated testing platform is connected with tested substation secondary device prefabricated cabin by optical fiber interface, described tested substation secondary device prefabricated cabin is connected with IEC61850 network message analyser by switch, and described integrated testing platform is connected with IEC61850 network message analyser also by testing workstation.

2. the test system for substation secondary device prefabricated cabin according to claim 1, it is characterised in that: described analysis report is XML file.

3. the test system for substation secondary device prefabricated cabin according to claim 1, it is characterized in that: described integrated testing platform, the control of tested person work station, electric current, voltage and the primary equipment status signal that simulated grid runs, its signal simulation scale can according to practical situation extension or reduction.

4. the method for testing of the test system for substation secondary device prefabricated cabin according to claim 1, it is characterised in that: comprise the following steps,

Step (1), is attached integrated testing platform, optical fiber interface, testing workstation, switch, IEC61850 network message analyser and tested substation secondary device prefabricated cabin, and testing workstation performs its test content；

Step (2), if the test content of testing workstation cannot complete, analysis report according to IEC61850 network message analyser, testing workstation obtains the prefabricated interior problem device of tested substation secondary device, and problem device is carried out single unit check, process problem device, again prepare its performance test；

Step (3), after completing the test content of testing workstation, testing workstation performs the performance test of whole test system, IEC61850 network message analyser generates analysis report, and is sent to testing workstation, and testing workstation is analyzed report and processes, output test result, complete test.

5. the method for testing of the test system for substation secondary device prefabricated cabin according to claim 4; it is characterized in that: step (1); testing workstation performs its test content, verifies and relay protection function test including the test of GOOSE message standardization, the empty terminal of the test of SV message specification, input and output.

6. the method for testing of the test system for substation secondary device prefabricated cabin according to claim 5, it is characterized in that: described GOOSE message standardization is tested, utilize message analysis software test to have the integrity of GOOSE message of tested secondary device generation of GOOSE transmitting capacity, correctness, standardization；

Described SV message specification is tested; testing workstation merges unit by its internal benchmark or merging unit emulator sends, to having the protection equipment of SV ability to accept, measurement and control unit and other secondary devices, the SV message meeting DL/T860 standard; the SV receiving ability of inspection equipment under test, and carry out sampled value accuracy test；

Described input and the empty terminal checking of output, including checking device configuration file and version；Data model；Equipment under test sends and receives the correctness of GOOSE displacement；Equipment under test receives the correctness of SV sampling；More than checking have one defective, then this input and the empty terminal validation test of output are defective；

Described relay protection function is tested, including the fixed value checking of the functional verification of protective relaying device and every protection.

7. the method for testing of the test system for substation secondary device prefabricated cabin according to claim 5, it is characterised in that: step (2), problem device is carried out single unit check, including setting up standby uniformity test and communication function inspection,

Described set up standby uniformity test, whether effective including device configuration file and version；Whether data model is correct；Whether model is normal with mapping mode；

Whether described communication function is checked, receive and send messages including device normal；Data transmission correctness；Whether normal communication function is；Whether communication process has disruption.

8. the method for testing of the test system for substation secondary device prefabricated cabin according to claim 5; it is characterized in that: step (3); testing workstation performs the performance test of whole test system, including equipment room information interactive testing, whole group of behavior of relay protection and time test, automated system performance test, snowslide inspection and applied in network performance test.

9. the method for testing of the test system for substation secondary device prefabricated cabin according to claim 8; it is characterized in that: described equipment room information interactive testing, including checking protective relaying device between start failure protection, lock-reclosing lock, connection hop-information interaction response correctness；Verify the correctness that five anti-block signals of monitoring system are mutual；

Whole group of behavior of described relay protection and time test, including, in system failure process, verifying the correctness of function cooperation between protection equipment and the correctness of sequence of movement；Test and start to relay protection trip signal to send time of whole process from fault, as whole group of movement time of relay protection；

Described automated system performance test, including remote measurement, remote signalling, distant control function verification of correctness, remote measurement accuracy test, remote signalling SOE time test；System response time: remote measurement change is transferred to the time of station level, and quantity of state change is transferred to the time of station level, and remote control performs the time；System loading rate index test: CPU normal duty rate, cpu load rate under accident, network normal duty rate, accident lower network rate of load condensate；

Described snowslide is checked, and under setting fault mode, carries out snowslide inspection, it is thus achieved that network load rate, cpu load rate, sequence of events recording situation, remote measurement, remote signalling, remote regulating, remote control implementation status；

Described applied in network performance test; including GOOSE message applied in network performance test; under given offered load flow; tripping operation between test protection measuring and controlling equipment and intelligent terminal, the correctness closed a floodgate and response time; and a certain secondary device goes wrong in analog network; mistake sends in GOOSE message situation, the response condition of other secondary device and performance in test network；

Sampled value applied in network performance test, under different background flow, whether test SV packet sampling value has packet loss or an incorrect order, Telemetry, function of measuring sampling precision；

Station level applied in network performance test; under heterogeneous networks flow; communication performance between test protection measuring and controlling equipment and monitoring backstage; including the packet loss of the time delay of MMS message, protection or remote signalling event MMS, monitoring backstage transmitting order to lower levels, protection supervisory equipment is to the correctness of command response and response time.