Closed-loop automatic verification method and device for secondary virtual loop of intelligent substation

Abstract

The invention discloses a closed-loop automatic verification method and device for a secondary virtual loop of an intelligent substation, and relates to the technical field of power system automation. Comprising an SCD analysis module, a virtual loop library, a process level and station level association library, a simulation protection module, a simulation monitoring background, a simulation intelligent terminal, an automatic control module, a data analysis module and a verification result export module. According to the closed-loop automatic verification method and device for the secondary virtual loop of the intelligent substation, a process layer and station control layer association mapping library is established, a closed-loop verification environment is formed based on equipment such as a simulation monitoring background, an intelligent terminal and a protection device, a test case is automatically generated, and automatic verification of the secondary virtual loop of the intelligent substation is realized through a closed-loop automatic control module technology. Closed-loop automatic verification of the secondary virtual loop of the intelligent substation is realized, manual operation is reduced, and manual acceptance is converted into automatic acceptance, so that the purpose of quickly realizing automatic acceptance of the secondary virtual loop of the intelligent substation is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of power system automation, and in particular to a method and device for automatic closed-loop verification of a secondary virtual circuit of an intelligent substation. Background Art

[0002] Smart substation is an important supporting node for the construction of smart grid. The hard cable connection of conventional substation is replaced by virtual secondary circuit based on networked digital communication. The SV (sampled value) and GOOSE (generic object oriented substation event) of the station control layer, bay layer and process layer are mainly transmitted through digital communication network. In addition to the functional verification of protection devices, measurement and control devices, merging units and intelligent terminals, the secondary commissioning of smart substation mainly focuses on SCD configuration files (substation configuration description files), virtual terminal connection configuration between devices, and verification of the correctness of the virtual terminal connection relationship between merging units, intelligent terminals and protection and measurement and control equipment. Since the secondary circuits of smart substations are digital and virtualized, the circuit relationships are complex. Taking a typical 220kV substation as an example, there are hundreds of virtual circuits that need to be verified. The current verification method mainly uses manual transmission to check the correctness of the virtual circuit on the measurement and control device, or actually open and close the circuit breaker, check the opening status on the protection device interface, and judge the correctness of the virtual circuit connection. In short, the on-site verification of secondary virtual circuits still remains in the manual verification stage, which is not only labor-intensive and error-prone, but also has high requirements on the professional level and debugging experience of the commissioning personnel. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a method and device for automatic closed-loop verification of a secondary virtual circuit in an intelligent substation, which solves the problems raised in the above background technology that the on-site verification of the secondary virtual circuit is completely dependent on manual work and the professional level of the debugging personnel.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a method and device for automatic closed-loop verification of the secondary virtual circuit of an intelligent substation, including establishing a process layer and a station control layer association mapping library, and forming a closed-loop verification environment based on equipment such as a simulation monitoring background, an intelligent terminal, and a protection device, and automatically generating test cases, and realizing closed-loop automatic verification of the secondary virtual circuit of the intelligent substation through closed-loop automatic control module technology;

[0005] The specific steps are as follows:

[0006] Step 1: Form a standard template library associated with the process layer and the station control layer;

[0007] Step 2: Import the SCD file, parse the DOI node with ctlModel 4 in the LN node with the measurement and control device logic CTRL, obtain the DO description, and form the data path of the remote control node through LDevice, LN, DOI, and DA to generate the remote control table of the station control layer; parse the dsDin telesignal data, generate the telesignal position signal corresponding to the remote control, as well as the input and output virtual terminal table of the measurement and control device in the process layer and station control layer association and the intelligent terminal output control block;

[0008] Step 3: According to the station control layer configuration and process layer configuration, based on the description and data path, generate full-link virtual loop test cases for remote control, remote control and GOOSE input and output of the process layer and station control layer;

[0009] Step 4: The automatic verification device sends the closing and opening commands of the knife switch to the measurement and control device according to the remote control definition in the IEC61850MMS protocol. The measurement and control device converts the station control layer command into the process layer opening command, that is, converts the station control layer data path into the process layer data path, and issues the GOOSE opening control command;

[0010] Step 5: The automatic acceptance device monitors the GOOSE output command and records the output data path and output value;

[0011] Step 6: After receiving the GOOSE command from the measurement and control device, the intelligent terminal converts the command to the primary mechanism, which performs the knife switch closing and opening operation and returns the knife switch position status to the intelligent terminal;

[0012] Step 7: The intelligent terminal forwards the switch position status to the measurement and control device, and the automatic verification device monitors the switch position signal forwarded by the intelligent terminal and records the position data path and input value;

[0013] Step 8: The measurement and control device converts the process layer position signal into station control layer data and sends it to the simulation monitoring background. After receiving the data, the simulation monitoring background records the received data path and telesignaling position;

[0014] Step 9: Analyze the received and sent data at each stage, and compare the received data with the expected data to obtain the result. If the data at each stage is consistent with the expected data, the entire virtual circuit is correct. Otherwise, the virtual circuit is wrong.

[0015] Step 10: According to the test case generated in step 2, take out the next knife switch or switch and execute steps 3-8 until all test cases are tested.

[0016] Optionally, the specific steps in step 1 are as follows:

[0017] (1) Import the SCD file, parse the process layer IED device name, access point, logical device instance, control block name and MAC address, APPID in the communication node, the IED device name, access point and IP address in the station control layer, parse the GOOS output control block with access point G1 in the IED device node, and the virtual terminal input and output associated channels in Inputs, parse the report control block and corresponding data set of the IED device node access point S1;

[0018] (2) Find the corresponding output device and output channel according to the input channel of the device, and generate output test cases according to the time uniqueness and the same data value action-reset method;

[0019] (3) Based on the GOOSE protocol of IEC61850, the intelligent terminal is simulated, the generated GOOSE output test cases are sent in a state series mode, and the process layer GOOSE output records are generated;

[0020] (4) Based on the MMS protocol of IEC61850, the monitoring background is simulated, the MMS report sent by the protection and measurement and control device is received in the form of a report, and the MMS record of the station control layer is generated;

[0021] (5) Based on the uniqueness of time in GOOSE and MMS records, a record is formed at the same time, and a comprehensive analysis is performed to obtain a correlation table between the process layer and the station control layer, thereby forming a correlation table between the process layer and the station control layer of the protection remote control device;

[0022] (6) Generate according to manufacturer, voltage level, model, and version, establish a process layer and station control layer association library for major manufacturers' protection and measurement and control devices, and form a process layer and station control layer association standard template library.

[0023] An automatic closed-loop verification device for a secondary virtual circuit of an intelligent substation as claimed in any one of the above claims, comprising an SCD analysis module, a virtual circuit library, a process layer and a station control layer association library, a simulation protection module, a simulation monitoring background, a simulation intelligent terminal, an automatic control module, a data analysis module, and a verification result export module;

[0024] Specifically,

[0025] The SCD parsing module is responsible for importing SCD, parsing the process layer GOOSE output control block and its channels, parsing the virtual input and virtual terminals and the corresponding output control blocks and channels, parsing the station control layer communication address, data set and its channels, report control block and remote control channel, etc.

[0026] The virtual circuit library block is responsible for organizing the parsed input virtual terminals and corresponding output virtual terminals into a virtual circuit library according to voltage levels and devices as data to be verified.

[0027] The process layer and station control layer association library module is responsible for automatically associating the corresponding relationship between the process layer and station control layer data inside the protection or measurement and control device using simulation, scanning and closed-loop technologies, providing support for automatic verification of virtual circuits.

[0028] The simulation protection module is responsible for simulating the protection module to send out a GOOSE tripping signal after a protection tripping event occurs, and receiving the position signal returned by the intelligent terminal.

[0029] The simulation monitoring background module is responsible for sending remote control signals from the simulation monitoring background and receiving event reports sent by the measurement and control device and the protection device.

[0030] The automatic control module is responsible for organically coordinating the generated test cases, simulated monitoring background, protection and intelligent terminals. The automatic control module blocks each module to operate according to logic, so that it can cooperate with the physical device to complete the automatic test.

[0031] The verification result export module is responsible for exporting the test results generated after automatic testing into a result report in PDF format to form the acceptance results.

[0032] The present invention provides a method and device for automatic closed-loop verification of a secondary virtual circuit of an intelligent substation, which has the following beneficial effects:

[0033] The method and device for automatic closed-loop verification of the secondary virtual circuit of the intelligent substation fully utilizes the simulation monitoring background and the intelligent terminal to realize the automatic association between the process layer and the station control layer, solves the association relationship between the process layer and the station control layer of the protection and measurement and control device, and uses closed-loop verification technology to realize automatic verification of the secondary virtual circuit, replacing the traditional method of manually triggering signals one by one and manually checking, thereby shortening the acceptance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the functional modules in the invention;

[0035] Figure 2 A schematic diagram of the relationship between the establishment process layer and the station control layer in the invention;

[0036] Figure 3 This is a schematic diagram for automatic verification of the transmission virtual circuit opened in the invention. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Embodiment 1: A closed-loop automatic verification method for a secondary virtual circuit of an intelligent substation includes establishing a process layer and a station control layer association mapping library, and forming a closed-loop verification environment based on a simulation monitoring background, an intelligent terminal, a protection device and other equipment, automatically generating test cases, and realizing closed-loop automatic verification of a secondary virtual circuit of an intelligent substation through a closed-loop automatic control module technology;

[0041] The specific steps are as follows:

[0042] Step 1: Form a standard template library associated with the process layer and the station control layer;

[0043] The specific steps are as follows:

[0044] (1) Import the SCD file, parse the process layer IED device name, access point, logical device instance, control block name and MAC address, APPID in the communication node, the IED device name, access point and IP address in the station control layer, parse the GOOS output control block with access point G1 in the IED device node, and the virtual terminal input and output associated channels in Inputs, parse the report control block and corresponding data set of the IED device node access point S1;

[0045] As shown in the following table:

[0046] Table 1 Process layer output control block

[0047] Device Name Logical Devices Control Block MAC Address APPID CL2201 PIGO Gocb1 01-0C-CD-01-01-02 1102 IL2201A RPIT gocb0 01-0C-CD-01-01-07 1107 PL2202A PIGO gocb 01-0C-CD-01-01-0A 110A CL2202 PIGO gocb1 01-0C-CD-01-01-0B 110B

[0048] Table 2 Output dataset

[0049]

[0050]

[0051] Table 3 Correspondence between input and output virtual terminals

[0052]

[0053] (2) Find the corresponding output device and output channel according to the input channel of the device, and generate output test cases according to the time uniqueness and the same data value action-reset method;

[0054] As shown in the following table:

[0055] Table 4 GOOSE output test cases

[0056]

[0057]

[0058] (3) Based on the GOOSE protocol of IEC61850, the intelligent terminal is simulated, the generated GOOSE output test cases are sent in a state series mode, and the process layer GOOSE output records are generated;

[0059] (4) Based on the MMS protocol of IEC61850, the monitoring background is simulated, the MMS report sent by the protection and measurement and control device is received in the form of a report, and the MMS record of the station control layer is generated;

[0060] (5) Based on the uniqueness of time in GOOSE and MMS records, a record is formed at the same time, and a comprehensive analysis is performed to obtain a correlation table between the process layer and the station control layer, thereby forming a correlation table between the process layer and the station control layer of the protection remote control device;

[0061] As shown in the following table:

[0062] Table 5

[0063]

[0064] (6) Generate according to manufacturer, voltage level, model, and version, establish the process layer and station control layer association library of protection and measurement and control devices of major manufacturers, and form the process layer and station control layer association standard template library;

[0065] As shown in the following table:

[0066] Table 6

[0067]

[0068] Step 2: Import the SCD file, parse the DOI node with ctlModel 4 in the LN node with the measurement and control device logic CTRL, obtain the DO description, and form the data path of the remote control node through LDevice, LN, DOI, and DA to generate the remote control table of the station control layer; parse the dsDin telesignal data, generate the telesignal position signal corresponding to the remote control, as well as the input and output virtual terminal table of the measurement and control device in the process layer and station control layer association and the intelligent terminal output control block;

[0069] As shown in the following table:

[0070] Table 7 Station control layer remote control table

[0071]

[0072]

[0073] Table 8 Remote control corresponding remote signal position signal

[0074]

[0075] Step 3: According to the station control layer configuration and process layer configuration, based on the description and data path, generate full-link virtual loop test cases for remote control, remote signaling and GOOSE input and output of the process layer and station control layer;

[0076] As shown in the following table:

[0077] Table 9

[0078]

[0079]

[0080]

[0081] Step 4: The automatic verification device sends the closing and opening commands of the knife switch to the measurement and control device according to the remote control definition in the IEC61850MMS protocol. The measurement and control device converts the station control layer command into the process layer opening command, that is, converts the station control layer data path into the process layer data path, and issues the GOOSE opening control command;

[0082] Step 5: The automatic acceptance device monitors the GOOSE output command and records the output data path and output value;

[0083] Step 6: After receiving the GOOSE command from the measurement and control device, the intelligent terminal converts the command to the primary mechanism, which performs the knife switch closing and opening operation and returns the knife switch position status to the intelligent terminal;

[0084] Step 7: The intelligent terminal forwards the switch position status to the measurement and control device, and the automatic verification device monitors the switch position signal forwarded by the intelligent terminal and records the position data path and input value;

[0085] Step 8: The measurement and control device converts the process layer position signal into station control layer data and sends it to the simulation monitoring background. After receiving the data, the simulation monitoring background records the received data path and telesignaling position;

[0086] Step 9: Analyze the received and sent data at each stage, and compare the received data with the expected data to obtain the result. If the data at each stage is consistent with the expected data, the entire virtual circuit is correct. Otherwise, the virtual circuit is wrong.

[0087] Step 10: According to the test case generated in step 2, take out the next knife switch or switch and execute steps 3-8 until all test cases are tested.

[0088] Embodiment 2: A closed-loop automatic verification device for a secondary virtual circuit of an intelligent substation, comprising an SCD analysis module, a virtual circuit library, a process layer and a station control layer association library, a simulation protection module, a simulation monitoring background, a simulation intelligent terminal, an automatic control module, a data analysis module, and a verification result export module;

[0089] Specifically,

[0090] The SCD parsing module is responsible for importing SCD, parsing the process layer GOOSE output control block and its channels, parsing the virtual input and virtual terminals and the corresponding output control blocks and channels, parsing the station control layer communication address, data set and its channels, report control block and remote control channel, etc.

[0091] The virtual circuit library block is responsible for organizing the parsed input virtual terminals and corresponding output virtual terminals into a virtual circuit library according to voltage levels and devices as data to be verified.

[0092] The process layer and station control layer association library module is responsible for automatically associating the corresponding relationship between the process layer and station control layer data inside the protection or measurement and control device using simulation, scanning and closed-loop technologies, providing support for automatic verification of virtual circuits.

[0093] The simulation protection module is responsible for simulating the protection module to send out a GOOSE tripping signal after a protection tripping event occurs, and receiving the position signal returned by the intelligent terminal.

[0094] The simulation monitoring background module is responsible for sending remote control signals from the simulation monitoring background and receiving event reports sent by the measurement and control device and the protection device.

[0095] The automatic control module is responsible for organically coordinating the generated test cases, simulated monitoring background, protection and intelligent terminals, and automatically controlling each module to run according to logic, so that it can cooperate with the physical device to complete the automatic test.

[0096] The verification result export module is responsible for exporting the test results generated after automatic testing into a result report in PDF format to form the acceptance results.

[0097] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for automatic closed-loop verification of a secondary virtual circuit in a smart substation, characterized in that: Establish a mapping library for the association between the process layer and the station control layer, and form a closed-loop verification environment based on the simulation monitoring background, intelligent terminals, protection devices and other equipment, automatically generate test cases, and realize closed-loop automatic verification of the secondary virtual circuit of the smart substation through closed-loop automatic control module technology; The specific steps are as follows: Step 1: Form a standard template library associated with the process layer and the station control layer; Step 2: Import the SCD file, parse the DOI node with ctlModel 4 in the LN node with the measurement and control device logic CTRL, obtain the DO description, and form the data path of the remote control node through LDevice, LN, DOI, and DA to generate the remote control table of the station control layer; parse the dsDin telesignal data, generate the telesignal position signal corresponding to the remote control, as well as the input and output virtual terminal table of the measurement and control device in the process layer and station control layer association and the intelligent terminal output control block; Step 3: According to the station control layer configuration and process layer configuration, based on the description and data path, generate full-link virtual loop test cases for remote control, remote control and GOOSE input and output of the process layer and station control layer; Step 4: The automatic verification device sends the closing and opening commands of the knife switch to the measurement and control device according to the remote control definition in the IEC61850MMS protocol. The measurement and control device converts the station control layer command into the process layer opening command, that is, converts the station control layer data path into the process layer data path, and issues the GOOSE opening control command; Step 5: The automatic acceptance device monitors the GOOSE output command and records the output data path and output value; Step 6: After receiving the GOOSE command from the measurement and control device, the intelligent terminal converts the command to the primary mechanism, which performs the knife switch closing and opening operation and returns the knife switch position status to the intelligent terminal; Step 7: The intelligent terminal forwards the switch position status to the measurement and control device, and the automatic verification device monitors the switch position signal forwarded by the intelligent terminal and records the position data path and input value; Step 8: The measurement and control device converts the process layer position signal into station control layer data and sends it to the simulation monitoring background. After receiving the data, the simulation monitoring background records the received data path and telesignaling position; Step 9: Analyze the received and sent data at each stage, and compare the received data with the expected data to obtain the result. If the data at each stage is consistent with the expected data, the entire virtual circuit is correct. Otherwise, the virtual circuit is wrong. Step 10: According to the test case generated in step 2, take out the next knife switch or switch and execute steps 3-8 until all test cases are tested.

2. According to claim 1, a method for automatic closed-loop verification of a secondary virtual circuit of an intelligent substation is characterized in that: The specific steps in step 1 are as follows: (1) Import the SCD file, parse the process layer IED device name, access point, logical device instance, control block name and MAC address, APPID in the communication node, the IED device name, access point and IP address in the station control layer, parse the GOOSE output control block with access point G1 in the IED device node, and the virtual terminal input and output associated channels in Inputs, parse the report control block and corresponding data set of the IED device node access point S1; (2) Find the corresponding output device and output channel according to the input channel of the device, and generate output test cases according to the time uniqueness and the same data value action-reset method; (3) Based on the GOOSE protocol of IEC61850, the intelligent terminal is simulated, the generated GOOSE output test cases are sent in a state series mode, and the process layer GOOSE output records are generated; (4) Based on the MMS protocol of IEC61850, the monitoring background is simulated, the MMS report sent by the protection and measurement and control device is received in the form of a report, and the MMS record of the station control layer is generated; (5) Based on the uniqueness of time in GOOSE and MMS records, a record is formed at the same time, and a comprehensive analysis is performed to obtain a correlation table between the process layer and the station control layer, thereby forming a correlation table between the process layer and the station control layer of the protection remote control device; (6) Generate according to manufacturer, voltage level, model, and version, establish a process layer and station control layer association library for major manufacturers' protection and measurement and control devices, and form a process layer and station control layer association standard template library.

3. An automatic closed-loop verification device for a secondary virtual circuit of an intelligent substation as claimed in any one of claims 1 to 2, characterized in that: It includes SCD parsing module, virtual circuit library, process layer and station control layer association library, simulation protection module, simulation monitoring background, simulation intelligent terminal, automatic control module, data analysis module, and verification result export module; Specifically, The SCD parsing module is responsible for importing SCD, parsing the process layer GOOSE output control block and its channels, parsing the virtual input and virtual terminals and the corresponding output control blocks and channels, parsing the station control layer communication address, data set and its channels, report control block and remote control channel, etc. The virtual circuit library block is responsible for organizing the parsed input virtual terminals and corresponding output virtual terminals into a virtual circuit library according to voltage levels and devices as data to be verified. The process layer and station control layer association library module is responsible for automatically associating the corresponding relationship between the process layer and station control layer data inside the protection or measurement and control device using simulation, scanning and closed-loop technologies, providing support for automatic verification of virtual circuits. The simulation protection module is responsible for simulating the protection module to send out a GOOSE tripping signal after a protection tripping event occurs, and receiving the position signal returned by the intelligent terminal. The simulation monitoring background module is responsible for sending remote control signals from the simulation monitoring background and receiving event reports sent by the measurement and control device and the protection device. The automatic control module is responsible for organically coordinating the generated test cases, simulated monitoring background, protection and intelligent terminals. The automatic control module blocks each module to operate according to logic, so that it can cooperate with the physical device to complete the automatic test. The verification result export module is responsible for exporting the test results generated after automatic testing into a result report in PDF format to form the acceptance results.

Images