An intelligent substation secondary virtual loop closed-loop automatic verification method and device

Abstract

The present invention discloses a method and device for automatically verifying the closed-loop of secondary virtual circuits in an intelligent substation, which relates to the technical field of power system automation, and includes an SCD parsing 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. The method and device for automatically verifying the closed-loop of secondary virtual circuits in the intelligent substation establish an association mapping library between the process layer and the station control layer, and form a closed-loop verification environment based on devices such as the simulation monitoring background, intelligent terminal, and protection device, automatically generate test cases, and realize the closed-loop automatic verification of secondary virtual circuits in the intelligent substation through the closed-loop automatic control module technology, reduce manual operations, and change from manual acceptance to automatic acceptance, so as to achieve the purpose of quickly realizing the automatic acceptance of secondary virtual circuits in the intelligent substation.

Description

Technical Field

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

[0002] Intelligent substations are important support nodes in the construction of intelligent power grids. They replace the hard cable connections in conventional substations with virtual secondary circuits based on networked digital communication. The SV (Sampled Values) and GOOSE (Generic Object Oriented Substation Events) of the station control layer, bay layer, and process layer mainly transmit information through digital communication networks. In addition to verifying the functions of devices such as protection devices, measurement and control devices, merging units, and intelligent terminals during the secondary commissioning work of intelligent substations, it mainly focuses on the SCD configuration file (Substation Configuration Description File), the virtual terminal connection configuration between devices, and verifying the correctness of the virtual terminal connection relationship between the merging unit, intelligent terminal, and protection and measurement control devices. Due to the digital and virtual characteristics of the secondary circuits in intelligent substations and the complex circuit relationships, taking a typical 220 kV substation as an example, there are up to hundreds of virtual circuits to be verified. The current verification method mainly uses manual transmission to check the correctness of the virtual circuits on the measurement and control devices, or actually opening and closing the circuit breakers and checking the input status on the protection device interface to 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 not only has a large workload and is prone to errors, but also requires a high professional level and debugging experience of the debugging personnel. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a method and device for automatically verifying the closed-loop of secondary virtual circuits in an intelligent substation, which solves the problems such as the complete dependence on manual work and the professional level of debugging personnel in the on-site verification of secondary virtual circuits mentioned in the above background art.

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

[0005] The specific steps are as follows:

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

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

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

[0009] Step 4: Automatically verify that the device sends the closing and opening commands of the disconnecting switch to the control device according to the remote control definition in the IEC61850 MMS protocol. The control device converts the station control layer command into a process layer output command, that is, converts the station control layer data path into a process layer data path, and issues a GOOSE output control command.

[0010] Step 5: Automatically verify that the device monitors the GOOSE output command and records the output data path and the output value.

[0011] Step 6: After receiving the GOOSE command sent by the control device, the intelligent terminal converts the command to the primary mechanism. The primary mechanism performs the closing and opening operations of the disconnecting switch and returns the disconnecting switch position status to the intelligent terminal.

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

[0013] Step 8: The 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 the remote signal position.

[0014] Step 9: Analyze the received and sent data in each stage, compare the received data with the expected data, and obtain the result. If the data in each stage is consistent with the expected data, the entire virtual loop is correct; otherwise, the virtual loop is incorrect.

[0015] Step 10: According to the test cases generated in Step 2, take out the next disconnecting 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 names of process layer IED devices, access points, logical device instances, control block names, MAC addresses, and APPIDs in communication nodes, the names of IED devices, access points, and IP addresses 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-output association channels in Inputs, and parse the report control block and the corresponding data set of the IED device node with 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 action-return mode of the same data value;

[0019] (3) Based on the GOOSE protocol of IEC61850, simulate the intelligent terminal, send the generated GOOSE output test cases in the form of a state series, and generate the process layer GOOSE output record;

[0020] (4) Based on the MMS protocol of IEC61850, simulate the monitoring background, receive the MMS reports sent by the protection and measurement and control devices in the form of reports, and generate the station control layer MMS records;

[0021] (5) Based on the time uniqueness in the GOOSE and MMS records, form a record at the same time, comprehensively analyze the association relationship table between the process layer and the station control layer, and form the association table between the process layer and the station control layer of the protection and remote control device;

[0022] (6) Generate according to the manufacturer, voltage level, model, and version, establish the association library between the process layer and the station control layer of the protection and measurement and control devices of the main manufacturers, and form the association standard template library between the process layer and the station control layer.

[0023] An intelligent substation secondary virtual circuit closed-loop automatic verification device for any one of the above claims, including an SCD parsing module, a virtual circuit library, an association library between the process layer and the station control layer, a simulated protection module, a simulated monitoring background, a simulated 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 the SCD, parsing out the process layer GOOSE output control block and its channels, parsing out the virtual input virtual terminals and the corresponding output control blocks and channels, parsing out the station control layer communication addresses, data sets and their channels, report control blocks, and remote control channels, etc.;

[0026] The virtual circuit library block is responsible for sorting the parsed input virtual terminals and the corresponding output virtual terminals into a virtual circuit library according to the voltage level and device, as the data to be verified;

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

[0028] The simulation protection module is responsible for sending GOOSE trip signals after a protection trip event occurs in the simulation protection module and receiving the position signals returned by the intelligent terminal;

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

[0030] The automatic control module is responsible for coordinating the generated test cases, the simulated monitoring background, the protection, and the intelligent terminal organically. The automatic control module makes each module operate according to the logic, enabling it to 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 the automatic test into a PDF format result report to form the acceptance result.

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

[0033] The method and device for closed-loop automatic verification of secondary virtual circuits in this intelligent substation make full use of the simulation monitoring background and intelligent terminal to achieve the automatic association of the process layer and station control layer, solve the association relationship between the process layer and station control layer of the protection and measurement and control device, and use the closed-loop verification technology to achieve the automatic verification of secondary virtual circuits, replacing the traditional method of manually triggering signals one by one and manually checking, shortening the acceptance time. Brief Description of the Drawings

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

[0035] Figure 2 It is a schematic diagram of establishing the association relationship between the process layer and station control layer in this invention;

[0036] Figure 3 It is a schematic diagram of the automatic verification of the output drive virtual circuit in this invention. Detailed Embodiment

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

[0038] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed 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 "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Embodiment 1: An intelligent substation secondary virtual circuit closed-loop automatic verification method, including establishing an associated mapping library between the process layer and the station control layer, and forming a closed-loop verification environment based on devices such as a simulation monitoring background, intelligent terminals, and protection devices, automatically generating test cases, and realizing the closed-loop automatic verification of the secondary virtual circuit of the intelligent substation through the closed-loop automatic control module technology;

[0041] The specific steps are as follows:

[0042] Step 1: Form an associated standard template library between 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, MAC address, and 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 the access point G1 in the IED device node, and the virtual terminal input / output associated channels in Inputs, and parse the report control block with the access point S1 in the IED device node and the corresponding data set.

[0045] As shown in the following table:

[0046] Table 1 Process layer output control block

[0047] Device Name Logical Device 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 data set

[0049]

[0050]

[0051] Table 3 Corresponding Relationship between Input and Output Virtual Terminals

[0052]

[0053] (2) Search for 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 action - reset mode of the same data value;

[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, simulate the intelligent terminal, send the generated GOOSE output test cases in the form of a state series, and generate the GOOSE output record at the process layer;

[0059] (4) Based on the MMS protocol of IEC61850, simulate the monitoring background, receive the MMS reports sent by the protection and measurement control device in the form of reports, and generate the MMS record at the station control layer;

[0060] (5) Based on the time uniqueness in the GOOSE and MMS records, form a record at the same time, comprehensively analyze the correlation relationship table between the process layer and the station control layer, and form the 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 the manufacturer, voltage level, model, and version, establish the correlation library between the process layer and the station control layer of the protection and measurement control devices of the main manufacturers, and form the correlation standard template library between the process layer and the station control layer;

[0065] As shown in the following table:

[0066] Table 6

[0067]

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

[0069] As shown in the following table:

[0070] Table 7 Station Control Layer Remote Control Table

[0071]

[0072]

[0073] Table 8 Remote Signal Position Signals Corresponding to the Remote Control

[0074]

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

[0076] As shown in the following table:

[0077] Table 9

[0078]

[0079]

[0080]

[0081] Step 4: Automatically verify that the device sends the closing and opening commands of the disconnecting switch to the control device according to the remote control definition in the IEC61850 MMS protocol. The control device converts the station control layer command into a process layer output command, that is, converts the station control layer data path into a process layer data path, and issues a GOOSE output control command.

[0082] Step 5: Automatically verify that the device monitors the GOOSE output command and records the output data path and output value.

[0083] Step 6: After the intelligent terminal receives the GOOSE command sent by the control device, it converts the command to the primary mechanism. The primary mechanism performs the closing and opening operations of the disconnecting switch and returns the disconnecting switch position status to the intelligent terminal.

[0084] Step 7: The intelligent terminal forwards the disconnector position status to the measurement and control device. The device automatically verifies the disconnector position signal forwarded by the intelligent terminal and records the position data path and the input value.

[0085] Step 8: The measurement and control device converts the process layer position signal into substation 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 the remote signal position.

[0086] Step 9: Analyze the received and sent data in each stage, compare the received data with the expected data, and obtain the result. If the data in each stage is consistent with the expected data, the entire virtual circuit is correct; otherwise, the virtual circuit is incorrect.

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

[0088] Embodiment 2: A secondary virtual circuit closed-loop automatic verification device for an intelligent substation, including an SCD parsing module, a virtual circuit library, a process layer and substation 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 the SCD, parsing out the process layer GOOSE output control block and its channels, parsing out the virtual input virtual terminals and the corresponding output control blocks and channels, parsing out the substation control layer communication address, data set and its channels, report control block and remote control channels, etc.

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

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

[0093] The simulation protection module is responsible for sending a GOOSE trip signal after a protection trip event occurs in the simulation protection module and receiving the position signal returned by the intelligent terminal.

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

[0095] The automatic control module is responsible for coordinating the generated test cases, the simulated monitoring background, the protection, and the intelligent terminal organically, automatically controlling each module to operate according to the logic, and making it 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 the automatic test into a result report in PDF format to form the acceptance result.

[0097] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An intelligent substation secondary virtual circuit closed-loop automatic verification method, characterized in that, Establish an associated mapping library for the process layer and the station control layer, and form a closed-loop verification environment based on the simulation monitoring background, intelligent terminals, and protection devices to automatically generate test cases. Through the closed-loop automatic control module technology, realize the closed-loop automatic verification of the secondary virtual circuits in the intelligent substation; The specific steps are as follows: Step 1: Form an associated standard template library for the process layer and the station control layer; Step 2: Import the SCD file, parse the DOI node with ctlModel being 4 in the LN node of the measurement and control device logic as CTRL, obtain the DO description, and generate the station control layer remote control table through the data path composed of LDevice, LN, DOI, and DA. Parse the dsDin remote signal data to generate the remote signal position signal corresponding to the remote control, as well as the input / output virtual terminal table of the measurement and control device and the intelligent terminal output control block in the association between the process layer and the station control layer; Step 3: Based on the station control layer configuration and the process layer configuration, generate full-link virtual circuit test cases for remote control, remote control, and GOOSE input / output of the process layer and the station control layer based on the description and the data path; Step 4: The automatic verification device sends the closing and opening commands of the disconnecting switch to the measurement and control device according to the remote control definition in the IEC61850 MMS protocol. The measurement and control device converts the station control layer command into a process layer output command, that is, converts the station control layer data path into a process layer data path, and issues a GOOSE output control command; Step 5: The automatic verification device monitors the GOOSE output command and records the output data path and the output value; Step 6: After receiving the GOOSE command sent by the measurement and control device, the intelligent terminal converts the command to the primary mechanism. The primary mechanism performs the closing and opening operations of the disconnecting switch and returns the disconnecting switch position status to the intelligent terminal; Step 7: The intelligent terminal forwards the disconnecting switch position status to the measurement and control device. The automatic verification device monitors the disconnecting switch position signal forwarded by the intelligent terminal and records the position data path and the input value; Step 9: 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 the remote signal position; Step 10: Analyze the received and sent data in each stage, compare the received data with the expected data to obtain the result. If the data in each stage is consistent with the expected data, the entire virtual circuit is correct; otherwise, the virtual circuit is incorrect; Step 11: According to the test cases generated in Step 2, take out the next disconnecting switch or switch and execute Steps 3 - 8 until all test cases are tested; 2. The intelligent substation secondary virtual loop closed-loop automatic verification method according to claim 1, wherein: 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, MAC address, and 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 the access point being G1 in the IED device node, and the virtual terminal input / output associated channel in Inputs, and parse the report control block with the access point S1 in the IED device node and the corresponding data set; (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 action - reset mode of the same data value; (3) Based on the GOOSE protocol of IEC61850, simulate the intelligent terminal, send the generated GOOSE output test cases in the form of a status series, and generate the process layer GOOSE output record; (4) Based on the MMS protocol of IEC61850, simulate the monitoring background, receive the MMS reports sent by the protection and measurement control device in the form of reports, and generate the station control layer MMS record; (5) Based on the time uniqueness in the GOOSE and MMS records, form a record at the same time, comprehensively analyze the correlation relationship table between the process layer and the station control layer, and form the correlation table between the process layer and the station control layer of the protection remote control device; (6) Generate according to the manufacturer, voltage level, model, and version, establish the correlation library between the process layer and the station control layer of the protection and measurement control devices of the main manufacturers, and form the correlation standard template library between the process layer and the station control layer.

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

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