An integrated testing method, system, medium and equipment for a substation secondary system

Abstract

The present invention provides an integrated testing method, system, medium and equipment for a substation secondary system. During the integrated testing, a digital calibrator transmits SV data to a system protection device, and uses the GOOSE publishing function to simulate fault signals of phase-to-phase faults and single permanent faults. The fault signal is fed back to verify whether the protection action time is within the standard range, and whether the intelligent terminal can correctly close the test content. The information displayed by the fault recorder and network analyzer is compared and verified with the actual protection action process.

Description

Technical Field

[0001] The present disclosure relates to the technical field of smart substations, and in particular to an integrated testing method, system, medium and equipment for a substation secondary system. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art.

[0003] The development of digital relay protection tester has replaced the original cable method with optical fiber for relay protection test of digital substation. Instantaneous data is no longer injected into the protection device in analog form, but in the form of sampled value message in accordance with IEC61850 9-2 specification. At the same time, the switch status quantity is also interacted through GOOSE message. This debugging method has initially possessed the single-unit inspection function of the relay protection equipment of the smart substation, but has not yet involved the debugging of other equipment in the secondary system. The smart terminal is now also included in the inspection scope. Compared with the previous method, the test instrument no longer relies on the GOOSE message fed back by the protection device to check the correctness of the protection device response, but checks it through the switch position pulse signal fed back by the smart terminal, and further tests the interaction results between the protection device and the smart terminal in the secondary system. However, the position pulse signal can only reflect the final result of the secondary system behavior. If an abnormal action occurs, it is difficult to locate the source of the problem. The above method actually only cares about the correctness of the behavior of the secondary equipment in a single compartment of the substation. The advantage is that the debugging method is simple and intuitive. It provides a good technical means for the testing and debugging of single equipment in smart substations. However, from the perspective of testing the complete functions of the secondary system, this method is still difficult to meet the needs. First, this type of method cannot ignore the impact of data acquisition, network communication and other links in the secondary system, and the test scope has not yet covered the entire secondary system. Secondly, since it does not have a distributed structure and lacks consideration of the relationship between the primary lines, it is difficult to test the protection functions above the level of the bay and station domain. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes an integrated testing method, system, medium and equipment for the secondary system of a substation, which greatly improves the operability between equipment in the secondary debugging of the substation, enhances the connectivity between equipment, and comprehensively analyzes and improves the debugging method to solve the above problems.

[0005] According to some embodiments, the present disclosure adopts the following technical solutions:

[0006] An integrated test system for a substation secondary system, comprising:

[0007] The current transformer and voltage transformer in the primary system provide power frequency and transient signals to the secondary system; the secondary system includes:

[0008] A merging unit and a switch are used to reorganize and distribute voltage and current signals.

[0009] Relay protection device, used to protect the signals after reorganization and distribution of merging units and switches;

[0010] Metering device for calculating and measuring the signals reorganized and distributed by the merging unit and the switch;

[0011] The measurement control device is used to perform calculation, measurement and control on the signals reorganized and distributed by the merging unit and the switch.

[0012] According to other embodiments, the present disclosure adopts the following technical solutions:

[0013] The message output by the merging unit carries data, and the output message carries protection action and switch position signals.

[0014] Perform individual debugging on all devices or modules, and then conduct integration testing to see whether the system composed of the devices or modules can operate normally;

[0015] Single unit debugging includes combined unit testing, protection device testing, single unit disconnection and alarm testing, and measurement and control device testing.

[0016] Furthermore, the combined unit test is to use a simulator to integrate the voltage and current analog quantities of the electronic transformer, and send them to the measurement, control and protection device through a formatted message;

[0017] In the voltage merging unit, the simulator inputs a voltage analog quantity to the voltage merging unit, and compares the analog quantity with the voltage phase and amplitude measured in the voltage merging unit panel. The voltage merging unit outputs the comparison result to the message analysis recorder.

[0018] Furthermore, in the current merging unit, the current merging unit and the voltage merging unit are first cascaded, and then the voltage output by the large current generator is input into the electronic simulator, and the analog quantity in the simulator is compared with the current and voltage phase and amplitude measured in the current merging unit panel, and the current merging unit outputs the comparison result to the message analysis recorder.

[0019] Furthermore, during the protection device test, the digital calibrator is operated to simulate various historical faults, verify whether the protection device logic diagram is correct, insert and retract the protection device pressure plate, detect the protection pressure plate function, and detect the action behavior of the protection device under the simulated fault state provided by the digital calibrator.

[0020] Furthermore, in the single-unit disconnection and alarm test of the device, when GOOSE or SV disconnection, invalid sampling value, or channel delay change occurs, the corresponding action conditions, alarm signals, and maintenance status are checked one by one to determine whether they meet the specifications.

[0021] Furthermore, during the integrated test, the digital calibrator transmits SV data to the system protection equipment, and uses the GOOSE publishing function to simulate the fault signals of phase-to-phase faults and single permanent faults. It verifies whether the protection action time is within the standard range and whether the intelligent terminal can correctly close the test content through feedback of the fault signal, and compares and verifies the information displayed by the fault recorder and network analyzer with the actual protection action process.

[0022] According to other embodiments, the present disclosure adopts the following technical solutions:

[0023] An electronic device comprises a processor and a memory, wherein the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the steps in any one of the methods are executed.

[0024] According to other embodiments, the present disclosure adopts the following technical solutions:

[0025] A storage medium stores a computer program, wherein the computer program executes the steps in any one of the methods when executed by a processor.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The integrated test disclosed in the present invention is relatively simple and easy to perform, which is reflected in that the test process is not restricted by on-site conditions, the debugging cycle is short, the test environment is good, problems are discovered in a timely manner, and the project progress is fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure.

[0029] Figure 1 is a structural schematic diagram of an embodiment of a test system for a substation secondary system of the present invention;

[0030] Figure 2 is a schematic diagram of the structure of an embodiment of a voltage merging unit of the present invention;

[0031] Figure 3 is a schematic structural diagram of an embodiment of a protection device testing system of the present invention;

[0032] Figure 4 is a schematic diagram of the structure of an embodiment of the integrated test system of the present invention; DETAILED DESCRIPTION

[0033] The present disclosure is further described below in conjunction with the accompanying drawings and embodiments.

[0034] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present disclosure. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present disclosure belongs.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] The present disclosure provides an integrated test system for a substation secondary system in one embodiment, including: Figure 1 As shown, the current transformer and voltage transformer in the primary system provide power frequency and transient signals to the secondary system. The secondary system includes:

[0037] The merging unit and the switch are used to reorganize and distribute the voltage and current signals.

[0038] Relay protection device, used to protect the signals after reorganization and distribution of merging units and switches;

[0039] Metering device for calculating and measuring the signals reorganized and distributed by the merging unit and the switch;

[0040] The measurement control device is used to perform calculation, measurement and control on the signals reorganized and distributed by the merging unit and the switch.

[0041] The message output by the merging unit carries data, and the output message carries protection action and switch position signals.

[0042] Smart substations can be divided into three layers according to their functions: station control layer, bay layer, and process layer. The process layer includes primary equipment such as transformers, circuit breakers, disconnectors, current / voltage transformers, and their associated intelligent terminals, merging units, and online monitoring equipment. The equipment in the bay layer generally refers to secondary equipment such as relay protection devices, system measurement and control devices, and monitoring function group master IEDs, which implement the function of using a bay data and acting on the primary equipment in the bay, that is, communicating with various remote inputs / outputs, sensors, and controllers. The station control layer includes automated station-level monitoring and control systems, station domain control, communication systems, timing systems, etc., to implement monitoring, control, alarm, and information interaction functions for all station equipment, and complete data acquisition and monitoring and control operation interlocking, as well as synchronous phasor acquisition, electric energy acquisition, protection information management, and other related functions.

[0043] The system structure of smart substation is as follows: Figure 1 As shown in the figure, the current transformer (CT) and voltage transformer (PT) in the primary system of the substation provide power frequency and transient signals to the secondary system. The secondary system of the intelligent substation includes merging units, intelligent operation boxes, switches, relay protection devices, metering devices, measurement and control devices, background monitoring systems and other equipment. Among them, the merging unit and the switch are responsible for reorganizing and distributing the signals provided by the voltage and current transformers, and the relay protection devices, metering devices, measurement and control devices, and background monitoring systems are responsible for utilizing the signals reorganized and distributed by the merging unit and the switch to realize the protection, control, measurement and other functions of the intelligent substation.

[0044] Example 2

[0045] An embodiment of the present disclosure provides an integrated testing method for a substation secondary system, including:

[0046] Perform individual debugging on all devices or modules, and then conduct integration testing to see whether the system composed of the devices or modules can operate normally;

[0047] Single unit debugging includes combined unit testing, protection device testing, single unit disconnection and alarm testing, and measurement and control device testing.

[0048] The purpose of the combined unit test is to use the ECVT simulator to integrate the voltage and current analog quantities of the electronic transformer and send them to the measurement, control and protection devices through IEC 61850-9-2 format messages.

[0049] The combined unit test is to use a simulator to integrate the voltage and current analog quantities of the electronic transformer and send them to the measurement, control and protection device through a formatted message;

[0050] like Figure 2As shown, in the voltage merging unit, the simulator inputs a voltage analog quantity to the voltage merging unit, and compares the analog quantity with the voltage phase and amplitude measured in the voltage merging unit panel, and the voltage merging unit outputs the comparison result to the message analysis recorder.

[0051] The ECVT simulator inputs the voltage analog quantity in 60044-8 format to the voltage merging unit, and compares the analog quantity with the voltage phase and amplitude measured in the voltage merging unit panel. Finally, the voltage merging unit outputs the comparison result to the message analysis recorder in 61850-9-2 format.

[0052] In the current merging unit, the current merging unit and the voltage merging unit are first cascaded, and then the voltage output by the large current generator is input into the electronic simulator, and the analog quantity in the simulator is compared with the phase and amplitude of the current and voltage measured in the current merging unit panel. The current merging unit outputs the comparison result to the message analysis recorder.

[0053] Specifically, the current merging unit and the voltage merging unit are cascaded first, and then the voltage output by the large current generator is input into the electronic PT simulator, and the analog quantity in the PT simulator is compared with the phase and amplitude of the current and voltage measured in the current merging unit panel. Finally, the current merging unit outputs the comparison result to the message analysis recorder in the 61850-9-2 format.

[0054] like Figure 3 As shown, during the protection device test, the digital calibrator is operated to simulate various historical faults, verify whether the protection device logic diagram is correct, insert and retract the protection device pressure plate, test the protection pressure plate function, and test the action behavior of the protection device under the simulated fault state provided by the digital calibrator.

[0055] During the test, the computer can control the digital calibrator to simulate various possible faults, such as single-phase permanent fault, single-phase instantaneous ground fault, phase-to-phase fault, etc. In addition, the digital calibrator can also verify the correctness of the protection device logic diagram, put in and out the protection device pressure plate, test the protection pressure plate function, and check the action behavior of the protection device under the simulation state provided by the digital calibrator.

[0056] During the single-unit disconnection and alarm test of the device, when GOOSE or SV disconnection, invalid sampling value, or channel delay change occurs, the corresponding action conditions, alarm signals, and maintenance status are checked one by one to determine whether they meet the specifications.

[0057] During the test, the digital calibrator is connected to the GOOSE and SV input ports of the protection and measurement and control device, and the response message is viewed and verified at the MMS output port of the measurement and control device. The purpose of the protection and measurement and control device test is to ensure that the automation system collects various types of sampled value information and messages in the substation and detects consistency with the SCD data, thereby prompting the background to respond to the information and messages and realize the normal operation of the automation system. In addition, the protection and measurement and control device test can also ensure that the accuracy level of the equipment meets the requirements of the regulations and realize the remote monitoring function of the smart substation.

[0058] The overall linkage test is a test of the linkage of each subsystem when the overall system protection is in action, based on the completion of the single-unit debugging and verification of the system equipment in the station.

[0059] like Figure 4 As shown in the figure, during the integrated test, the digital calibrator transmits SV data to the system protection equipment, and uses the GOOSE publishing function to simulate the fault signals of phase-to-phase faults and single permanent faults. It verifies whether the protection action time is within the standard range and whether the intelligent terminal can correctly close the test content by feedback of the fault signal, and compares and verifies the information displayed by the fault recorder and network analyzer with the actual protection action process.

[0060] Example 3

[0061] This embodiment provides an electronic device, including a processor and a memory, wherein the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the steps in the method are executed.

[0062] Example 4

[0063] This embodiment provides a storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps in the method are executed.

[0064] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0065] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0066] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0067] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0068] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

[0069] Although the above describes the specific implementation methods of the present disclosure in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present disclosure. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present disclosure, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present disclosure.

Claims

1. An integrated testing method for a substation secondary system, characterized in that: include: Perform individual debugging on all devices or modules, and then conduct integration testing to see whether the system composed of the devices or modules can operate normally; Single unit debugging includes combined unit testing, protection device testing, single unit disconnection and alarm testing, and measurement and control device testing; In the integrated test, the digital tester transmits SV data volume to the system protection device, and uses the GOOSE publishing function to simulate the fault signals of phase-to-phase faults and single permanent faults. The feedback of the fault signals is used to verify whether the protection action time is within the standard range, and whether the intelligent terminal can correctly close the test content. The information displayed by the fault recorder and network analyzer is compared and verified with the actual protection action process; In the protection device test, the digital calibration instrument is operated to simulate various historical faults, verify whether the logic diagram of the protection device is correct, insert and withdraw the protection device pressure plate, detect the protection pressure plate function and detect the action behavior of the protection device under the simulated fault state provided by the digital calibration instrument; In the single-unit disconnection and alarm test of the device, when GOOSE or SV disconnection, invalid sampling value, or channel delay change occurs, the corresponding action conditions, alarm signals, and maintenance status are checked one by one to determine whether they meet the specifications.

2. The integrated testing method of a substation secondary system according to claim 1, characterized in that: The combined unit test is to use a simulator to integrate the voltage and current analog quantities of the electronic transformer and send them to the measurement, control and protection device through a formatted message; In the voltage merging unit, the simulator inputs a voltage analog quantity to the voltage merging unit, and compares the analog quantity with the voltage phase and amplitude measured in the voltage merging unit panel. The voltage merging unit outputs the comparison result to the message analysis recorder.

3. The integrated testing method of a substation secondary system according to claim 2, characterized in that: In the current merging unit, the current merging unit and the voltage merging unit are first cascaded, and then the voltage output by the large current generator is input into the electronic simulator, and the analog quantity in the simulator is compared with the phase and amplitude of the current and voltage measured in the current merging unit panel. The current merging unit outputs the comparison result to the message analysis recorder.

4. An integrated test system for a substation secondary system using the integrated test method for a substation secondary system according to any one of claims 1 to 3, characterized in that: The current transformer and voltage transformer in the primary system provide power frequency and transient signals to the secondary system; the secondary system includes: A merging unit and a switch, wherein the merging unit and the switch are used to reorganize and distribute voltage and current signals; Relay protection device, used to protect the signals after the merging unit and the switch are reorganized and distributed; metering device, used to calculate and measure the signals after the merging unit and the switch are reorganized and distributed; The measurement control device is used to perform calculation, measurement and control on the signals reorganized and distributed by the merging unit and the switch.

5. An integrated test system for a substation secondary system as claimed in claim 4, characterized in that: The message output by the merging unit carries data, and the output message carries protection action and switch position signals.

6. An electronic device, characterized in that: The method comprises a processor and a memory, wherein the memory stores computer-readable instructions. When the computer-readable instructions are executed by the processor, the steps in the method according to any one of claims 1 to 3 are executed.

7. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 3 are executed.

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