A method for verifying the feasibility of replacing bay devices in smart substations without power outages

Abstract

The present invention discloses a method for verifying the feasibility of replacing an interval layer device in a smart substation without power outage, comprising: using the smart substation SCD file to obtain the input configuration, output configuration, and external device interaction configuration of the original device; generating and confirming the consistency verification script configuration of the old and new devices; extracting the engineering site configuration parameters of the original device and applying them to the new device; using IEC61850 protocol simulation technology to simulate the on-site protocol interaction environment; synchronously verifying the consistency of the functions and behaviors of the old and new devices in the simulated protocol interaction environment; and outputting verification information to a human-machine interface or a verification report. The present invention combines the on-site configuration parameters of the operating smart station to perform consistency verification of the functions and behaviors of the new and old devices to be replaced. The verified new device can completely replace the old device in terms of function and behavior in the substation, thus completing the replacement without requiring a full station power outage for maintenance and debugging verification.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent substation automation, and in particular to a method for verifying the feasibility of non-stop replacement of an intelligent substation bay layer device. Background Art

[0002] Smart substations have been developed for over a decade. Currently, the devices in operation will gradually exceed their lifecycles. Due to differences in the service life of different types of devices and the ongoing technical transformation and capacity expansion, the urgency of replacing various devices in the station varies, making unified replacement and commissioning impossible. Furthermore, with the increasing demand for power supply reliability, it is becoming increasingly difficult to apply for planned power outages in operating substations. Applying for a station-wide power outage for maintenance to replace a single device is extremely costly. Operating smart substation devices collaborate and interact with each other, and even if a power outage is possible for maintenance, it is difficult to complete the debugging and verification work after the device replacement within a limited timeframe. This is especially true for the interlayer devices that connect the upper and lower layers. To a certain extent, there is a dilemma where devices have reached their end of life but cannot be moved or replaced.

[0003] Furthermore, with the discontinuation of production of existing chips, the development of emerging technologies, and the increasing requirements for domestic smart stations, the existing device models in operation are likely to face discontinuation or fail to meet future needs, and need to be replaced with new models of similar devices. How to verify whether the new devices can fully match the functions and behaviors of the original devices at the operating smart station site has become a difficult problem that needs to be solved urgently. Summary of the Invention

[0004] The present invention proposes a method for verifying the feasibility of replacing bay-layer devices in intelligent substations without power outages. The purpose is to overcome the defects of the existing technology, combine the on-site configuration parameters of the operating intelligent station to carry out consistency verification of the functions and behaviors of the new and old devices to be replaced, and the verified new device can completely replace the old device in terms of function and behavior in the substation, so that the replacement can be completed without the need for power outage of the entire station for maintenance and debugging verification.

[0005] The technical solutions of the present invention are as follows:

[0006] A method for verifying the feasibility of replacing a bay layer device in an intelligent substation without power outage comprises the following steps:

[0007] S1: Use the smart substation SCD file to obtain the original device input configuration, output configuration and external device interaction configuration;

[0008] S2: Generate and confirm the consistency check script configuration of the new and old devices;

[0009] S3: Extract the engineering site configuration parameters of the original device and apply them to the new device;

[0010] S4: Use IEC61850 protocol simulation technology to simulate the on-site protocol interaction environment;

[0011] S5: Synchronously verify the consistency of functions and behaviors of the old and new devices in the simulation protocol interaction environment;

[0012] S6: Output the calibration information to the human-machine interface or calibration report.

[0013] Furthermore, step S1 specifically includes importing and parsing the smart substation on-site SCD file and specifying the IED name corresponding to the original device, and extracting the following configuration parameters centered on the IED:

[0014] Extract the IED's own configuration parameters: traverse all data set configuration parameters in the IED, obtain all external information point parameters as the original device output configuration, traverse all virtual terminal configuration parameters in the IED, obtain all internal receiving information point parameters as the original device input configuration.

[0015] Extract the configuration parameters of the external IED that has an interactive relationship with the IED: Use the external information point parameters of the IED to traverse all other IEDs in the SCD file and extract the MMS receiving parameters and GOOSE receiving parameters of the external IED that has an interactive relationship with the IED.

[0016] By using the internal receiving information point parameters of the IED, all other IEDs in the SCD file are traversed to extract the SMV sending parameters and GOOSE sending parameters of the external IEDs that have an interactive relationship with the IED.

[0017] Search all data objects whose function is constrained to be control in the access point of the IED station control layer, and extract the remote control parameters of the IED.

[0018] Furthermore, step S2 specifically includes using the SMV sending parameters of the external IED generated in step S1 to generate a sampling value acquisition verification script, using the GOOSE sending parameters of the external IED to generate a state quantity acquisition verification script, using the MMS receiving parameters of the external IED to generate a report sending verification script, using the GOOSE receiving parameters of the external IED to generate an interlocking sending verification script, and using the remote control parameters of the IED to generate a remote control verification script; using various verification scripts to perform simultaneous or sequential triggering to generate a combination verification script for specific device functions.

[0019] Furthermore, step S3 specifically includes obtaining the CID and CCD files of the original device, downloading the obtained CID and CCD files of the original device to the new device and initializing and making it effective, so that the deployment project configuration parameters of the new and old devices are completely consistent.

[0020] When obtaining the CID and CCD files of the original device, if the bay layer device does not support file upload operations or does not support device CCD file initialization, the CID and CCD files of the original device are exported from the on-site SCD file; if the bay layer device supports CCD file initialization and supports file upload operations, the CID and CCD files are uploaded from the original device through FTP or MMS file service.

[0021] When the original device CID and CCD files are downloaded to the new device and initialized to take effect, if the new device cannot be initialized and configured using the original device CID and CCD files, the engineering parameters of the new device are manually configured.

[0022] Furthermore, step S4 specifically includes, in combination with the external device interaction configuration extracted in step S1, using GOOSE and SMV simulation technology to simulate the process layer device that has an interactive relationship with the original device, using GOOSE simulation technology to simulate the interval layer device that has an interactive relationship with the original device, and using MMS simulation technology to simulate the station control layer device that has an interactive relationship with the original device.

[0023] Furthermore, the synchronization verification in step S5 includes deploying the new and old devices in separate networks in a simulation interactive environment to perform consistency verification and synchronization verification:

[0024] The sampling value acquisition verification script is used to control the SMV simulation value to change according to a certain rule within the maximum and minimum value range, and to monitor and determine in real time the consistency of the MMS message and GOOSE message output by the new and old devices.

[0025] The report is used to send a verification script to determine the consistency of the MMS message.

[0026] The state quantity acquisition and verification script is used to control the GOOSE simulation value to change according to a certain rule within the allowable range, and to monitor and determine in real time the consistency of the MMS messages and GOOSE messages output by the new and old devices.

[0027] The interlocking verification script is used to control the change of the interlocking related GOOSE analog value, and the remote control verification script controls the issuance of remote control instructions, and monitors and determines in real time the consistency of the GOOSE messages output by the new and old devices under the interlocking conditions.

[0028] In response to the functional verification requirements of a specific device, the combined verification script is used to control the issuance of various simulation data, and to monitor and determine the consistency of the external output messages of the new and old devices in real time.

[0029] Furthermore, when the consistency check and synchronization verification is carried out in step S5, if the timeliness deviation and value accuracy deviation of the messages output by the new and old devices are within the set range, it is determined that the new and old devices have passed the consistency check.

[0030] Furthermore, the verification script supports human-computer interface display and editing.

[0031] Compared with the prior art, the present invention has the following beneficial effects: by generating consistency verification scripts for new and old devices and building a simulation protocol interactive environment, the new and old devices to be replaced are deployed in the simulation interactive environment in independent networks to carry out consistency verification and synchronous verification. The new device that has been verified can completely replace the old device in terms of function and behavior in the substation, and the replacement is completed without the need for power outage for maintenance and debugging verification of the entire station, solving the problem of difficult power outage and debugging verification when replacing the interval layer devices in the smart substation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a flow chart of the present invention;

[0033] Figure 2 Schematic diagram of the network structure of an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is described in detail below with reference to the accompanying drawings:

[0035] like Figure 1 A method for verifying the feasibility of replacing a bay layer device in an intelligent substation without power outage comprises the following steps:

[0036] S1: Use the smart substation SCD file to obtain the original device input configuration, output configuration and external device interaction configuration.

[0037] Preferably, obtain the SCD file from the on-site user of the smart substation and import it for parsing. In the SCD, select the IED name corresponding to the specified original device (such as C_L2201A) and extract the following configuration parameters based on this IED:

[0038] Extract the configuration parameters of the IED itself: traverse the configuration parameters of all data sets (DataSet) in the IED, obtain all parameters of the external information points as the original device output configuration; traverse the configuration parameters of all virtual terminals (Inputs) in the IED, obtain all parameters of the internal receiving information points as the original device input configuration.

[0039] Extract the configuration parameters of external IEDs that have an interactive relationship with this IED: Use the external information point parameters of this IED to traverse all other IEDs in the SCD file and extract the MMS receiving parameters and GOOSE receiving parameters of external IEDs that have an interactive relationship with this IED;

[0040] Using the internal receiving information point parameters of this IED, traverse all other IEDs in the SCD file, locate the source of external information points, and extract the SMV sending parameters and GOOSE sending parameters of external IEDs that have an interactive relationship with this IED;

[0041] Search all data objects whose function constraint (FC) is control (CO) in the access point of the station control layer of this IED and extract the remote control parameters of this IED.

[0042] S2: Generate and confirm the consistency check script configuration of the new and old devices.

[0043] Preferably, the SMV transmission parameters of the external IED generated in step S1 are used to generate a sample value acquisition verification script, the GOOSE transmission parameters of the external IED are used to generate a state quantity acquisition verification script, the MMS reception parameters of the external IED are used to generate a report transmission verification script, the GOOSE reception parameters of the external IED are used to generate an interlock transmission verification script, and the remote control parameters of the current IED are used to generate a remote control verification script. All verification scripts support human-machine interface display and editing.

[0044] Furthermore, various verification scripts are used to trigger simultaneously or sequentially to generate a combination verification script for a specific device function. For example, the anti-error calibration function combination verification script generated by combining the state quantity acquisition verification script and the interlocking sending verification script can be used to verify the anti-error calibration function of the measurement and control device, and also includes a protection function combination verification script of the protection device.

[0045] S3: The original device is temporarily removed from on-site operation to prepare for synchronization verification (if there are spare parts on site, a spare device of the same model can be used for verification). The engineering site configuration parameters of the original device are extracted and applied to the new device. The specific steps include the following:

[0046] First, obtain the CID and CCD files of the original device. If the bay-layer device in the initial deployment of the intelligent station does not support file upload or device CCD file initialization, export the CID and CCD files of the original device from the on-site SCD file. If the bay-layer device supports CCD file initialization and file upload, upload the CID and CCD files from the original device via FTP or MMS file service.

[0047] Second, download the original device's CID and CCD files to the new device and initialize them to ensure that the deployment engineering configuration parameters of the new and old devices are completely consistent. If the new device cannot be initialized using the original device's CID and CCD files, you can manually configure the new device's engineering parameters for verification in subsequent steps.

[0048] S4: Combined with the external device interaction configuration extracted in step S1, the IEC61850 protocol simulation technology is used to simulate the on-site protocol interaction environment of the original device.

[0049] Specifically, GOOSE and SMV simulation technologies are used to simulate process layer devices such as merging units that have interactive relationships with the original devices, GOOSE simulation technology is used to simulate process layer devices such as smart terminals and interval layer devices such as measurement and control devices that have interactive relationships with the original devices, and MMS simulation technology is used to simulate station control layer devices such as gateway machines that have interactive relationships with the original devices, ensuring the consistency of the simulated interactive environment and the real interactive environment of the smart station site for the original devices.

[0050] S5: Synchronously verify the consistency of functions and behaviors of the new and old devices in the simulation protocol interaction environment.

[0051] Preferably, if Figure 2 , the new and old devices are deployed in the simulation interaction environment as independent networks (similar to networks A and B). The active sending behaviors of each simulation device for the two networks are completely consistent. According to the verification script, the state quantity acquisition function, sampling value acquisition function, report sending function, interlocking sending function and remote control function of the new and old devices are synchronously verified. By simultaneously or sequentially controlling multiple simulation operations, the combined synchronous verification of specific functions of the new and old devices is realized. During the entire verification process, the external output behavior messages of the new and old devices are compared in real time for consistency, and the verification intermediate information and result information are automatically recorded.

[0052] Specifically, the sampling value acquisition verification script is used to control the SMV simulation value to change according to a certain rule within the maximum and minimum value range (such as increasing the step value each time from the minimum value to the maximum value), and to monitor and determine in real time the consistency of the MMS messages and GOOSE messages output by the new and old devices.

[0053] The report is used to send a verification script to determine the consistency of the MMS message.

[0054] The state quantity acquisition verification script is used to control the GOOSE simulation value to change according to a certain rule within the allowable range (such as alternating between 0 and 1 values), and to monitor and determine in real time the consistency of the MMS messages and GOOSE messages output by the new and old devices.

[0055] The interlocking verification script is used to control the change of the interlocking related GOOSE analog value, and the remote control verification script controls the issuance of remote control instructions, and monitors and determines in real time the consistency of the GOOSE messages output by the new and old devices under the interlocking conditions.

[0056] In response to the functional verification requirements of specific devices (such as the anti-error calibration verification requirements of measurement and control devices), a combined functional verification script is used to control the issuance of various simulation data, and to monitor and determine the consistency of the external output messages of new and old devices in real time.

[0057] Due to the possible differences in processing performance between new and old devices, a certain range of timeliness deviation and value accuracy deviation is allowed in the message consistency determination. All interactive messages and verification results should be automatically recorded.

[0058] S6: The intermediate information such as the interactive messages and the synchronous verification result information automatically recorded in step S5 are sorted according to certain rules after the verification is completed and displayed on the human-machine interface or generated into the verification result report, thereby completing the entire verification process and providing a basis for the feasibility of replacing the old and new devices without power outage and debugging.

[0059] This method provides a means for verifying the consistency of on-site functionality and behavior before and after bay-level device replacement in an operating smart substation. This method, to a certain extent, addresses the challenges of power outages and commissioning verification during bay-level device replacement in smart substations. The application and promotion of this technology can effectively support the advancement of smart substation technical upgrades and alleviate concerns for the development and promotion of smart substations and IEC61850 technology. Furthermore, this verification method and design approach can also be applied to process-level device replacement, station-control-level device replacement, and even complete monitoring system replacement in smart substations, demonstrating promising application prospects and engineering value.

[0060] In the embodiments provided in this application, the systems and methods shown can be implemented in other ways. For example, other methods are used to obtain SCD files or files such as the CID and CCD of the original device, and the verification of the new and old devices is carried out asynchronously and the message comparison time is corrected instead of the synchronous real-time message comparison of the verification of the new and old devices. Manual configuration parameters are used instead of the downloading method using the original device CID and CCD to complete the new device engineering configuration, etc. Various modifications to this embodiment are easy for professionals in this field, and the general principles defined in this article can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this article, but will conform to the widest scope consistent with the principles and novel features disclosed in this article.

Claims

1. A method for verifying the feasibility of replacing a bay layer device in an intelligent substation without power outage, characterized in that: The steps include: S1: Use the smart substation SCD file to obtain the original device input configuration, output configuration and external device interaction configuration; The step S1 specifically includes importing and parsing the smart substation site SCD file and specifying the IED name corresponding to the original device, and extracting the following configuration parameters based on the IED: Extract the IED's own configuration parameters: traverse all data set configuration parameters in the IED, obtain all external information point parameters as the original device output configuration, traverse all virtual terminal configuration parameters in the IED, obtain all internal receiving information point parameters as the original device input configuration; Extract the configuration parameters of the external IED that has an interactive relationship with the IED: Use the external information point parameters of the IED to traverse all other IEDs in the SCD file and extract the MMS receiving parameters and GOOSE receiving parameters of the external IED that has an interactive relationship with the IED; Using the internal receiving information point parameters of the IED, traverse all other IEDs in the SCD file and extract the SMV sending parameters and GOOSE sending parameters of the external IEDs that have an interactive relationship with the IED; Search all data objects whose function is constrained to be control in the access point of the IED station control layer, and extract the remote control parameters of the IED; S2: Generate and confirm the consistency check script configuration of the new and old devices; The step S2 specifically includes generating a sampling value acquisition verification script using the SMV sending parameters of the external IED generated in step S1, generating a state quantity acquisition verification script using the GOOSE sending parameters of the external IED, generating a report sending verification script using the MMS receiving parameters of the external IED, generating an interlocking sending verification script using the GOOSE receiving parameters of the external IED, and generating a remote control verification script using the remote control parameters of the IED; and generating a combination verification script for a specific device function by using various verification scripts to be triggered simultaneously or sequentially. S3: Extract the engineering site configuration parameters of the original device and apply them to the new device; S4: Use IEC61850 protocol simulation technology to simulate the on-site protocol interaction environment; S5: Synchronously verify the consistency of functions and behaviors of the old and new devices in the simulation protocol interaction environment; S6: Output the calibration information to the human-machine interface or calibration report.

2. The method for verifying the feasibility of replacing a bay layer device in a smart substation without power outage according to claim 1, characterized in that: The step S3 specifically includes obtaining the CID and CCD files of the original device, downloading the obtained CID and CCD files of the original device to the new device and initializing and taking effect thereof, so that the configuration parameters of the deployment project of the new and old devices are completely consistent; When obtaining the CID and CCD files of the original device, if the bay layer device does not support file upload operations or does not support device CCD file initialization, the CID and CCD files of the original device are exported from the on-site SCD file; If the bay layer device supports CCD file initialization and file upload operations, the CID and CCD files are uploaded from the original device via FTP or MMS file service; When the original device CID and CCD files are downloaded to the new device and initialized to take effect, if the new device cannot be initialized and configured using the original device CID and CCD files, the engineering parameters of the new device are manually configured.

3. The method for verifying the feasibility of replacing a bay layer device in a smart substation without power outage according to claim 1, characterized in that: The step S4 specifically includes, in combination with the external device interaction configuration extracted in step S1, using GOOSE and SMV simulation technologies to simulate the process layer device that has an interactive relationship with the original device, using GOOSE simulation technology to simulate the interval layer device that has an interactive relationship with the original device, and using MMS simulation technology to simulate the station control layer device that has an interactive relationship with the original device.

4. The method for verifying the feasibility of replacing a bay layer device in a smart substation without power outage according to claim 1, characterized in that: The synchronization verification in step S5 includes deploying the new and old devices in separate networks in a simulation interactive environment to perform consistency verification and synchronization verification: The sampling value acquisition verification script is used to control the SMV simulation value to change according to a certain rule within the maximum and minimum value range, and to monitor and determine in real time the consistency of the MMS message and GOOSE message output by the new and old devices; Using the report to send a verification script to determine the consistency of the MMS message; The state quantity acquisition verification script is used to control the GOOSE simulation value to change according to a certain rule within the allowable range, and to monitor and determine in real time the consistency of the MMS message and GOOSE message output by the new and old devices; The interlocking verification script is used to control the change of the interlocking related GOOSE analog value, and the remote control verification script controls the issuance of remote control instructions, and monitors and determines in real time the consistency of the GOOSE messages output by the new and old devices under the interlocking conditions; In response to the functional verification requirements of a specific device, the combined verification script is used to control the issuance of various simulation data, and to monitor and determine the consistency of the external output messages of the new and old devices in real time.

5. The method for verifying the feasibility of replacing a bay layer device in a smart substation without power outage according to claim 4, characterized in that: When the consistency check and synchronization verification is carried out in step S5, if the timeliness deviation and value accuracy deviation of the messages output by the new and old devices are within the set range, it is determined that the new and old devices have passed the consistency check.

6. The method for verifying the feasibility of replacing a bay layer device in a smart substation without power outage according to any one of claims 1 to 5, characterized in that: The verification script supports human-computer interface display and editing.

Images