Design and Implementation of the Rapid Debugging and Automatic Acceptance System for the Substation Integrated Automation System

This article designs a rapid debugging and automatic acceptance system for the comprehensive automation system of substations, mainly used for the automatic acceptance of information in intelligent substation monitoring systems. It achieves functions such as static verification of remote configuration, synchronous acceptance of remote information and on-site monitoring information, dynamic closed-loop verification of remote information, automatic triggering of remote information, and archiving of acceptance reports; By using computer software technology, communication technology, and other technological means to improve the automation level of the comprehensive automation system acceptance of substations, reduce the participation of various departments in the acceptance process, and reduce the workload of manual operation of primary and secondary equipment addition.


Introduction
At present, the dispatching automation system mainly realizes the data acquisition and control (SCADA) function.With the development of dispatching automation technology and the further development of computer network technology [1] , the necessary redundant channels have become an inevitable development trend in the process of smart grid construction.Therefore, each operation distribution substation needs to establish multiple SCADA business channels with the dispatching automation system master station.In order to ensure the reliability of the power system, during the acceptance stage, it is necessary to verify all data of each business channel.During the verification, a protection tester needs to be used on the secondary equipment side of the substation for dosing, and data verification needs to be carried out with the main station's dispatch automation system [2] .In practice, each substation may establish up to ten business channels with the main station, which requires multiple dosing and signal verification on site, which resulted in a large amount of repetitive work and took up a lot of manpower and resources [3,4] .Therefore, many researchers use new technologies and methods to make substations more intelligent and reduce the use of manpower and resources.Such as in [5], the intelligent monitoring system of the substation robot's working state is constructed by combining virtual reality technology.And to improve the intelligence and automation for adapting to the development of prosumer substations, Wang et al. [6] propose an isolation switch opening and closing position discrimination method based on intelligent image recognition technology.
Based on the above background, this article designs a rapid debugging and acceptance system for the substation comprehensive automation system, introducing the concept of automatic acceptance to improve the efficiency of substation dispatch automation acceptance.Adopting a portable industrial control host configuration, the shell of the industrial control host has been securely reinforced, suitable for various substation debugging and operation environments.The domestically produced Ningsi Panshi Linux security operating system is installed to ensure the safe and stable operation of the device's software and hardware systems.

Overall technical plan
The main purpose of the acceptance of the substation monitoring information system is to verify the consistency of telemetry, remote signaling, and remote controlling information among the primary and secondary equipment in the station and the monitoring background, as well as the dispatch automation main station system.Through this, it can ensure that the monitoring background system in the station and the dispatch automation main station can be completely consistent with the actual operating status of the primary and secondary equipment.
The traditional acceptance process of substation systems mainly includes two stages.a.In the station acceptance stage: Before normal communication with the main station's communication channel, the information exchange function acceptance among the protection, measurement and control devices, and the monitoring backend system is completed.
b. Acceptance stage of the dispatch master station: After normal communication with the communication channel of the master station, the acceptance of the information exchange function among the protection, measurement and control devices and the dispatch master station system is completed.
From the perspective of debugging the actual information exchange function, it can be divided into three parts.
c. Debugging of information exchange function among protection, measurement and control devices and monitoring backend system d.Debugging of information exchange function among protection, measurement and control devices and remote machines (communication gateway) e. Debugging of information exchange function among remote machines and dispatch master station system Therefore, the fundamental goal of automatic acceptance of substation monitoring information is to achieve automation of substation monitoring information acceptance through computer software, hardware technology, and communication technology.Through this, it can ensure that the monitoring backend system and scheduling automation main station in the station can be completely consistent with the actual operation status of primary and secondary equipment, reduce the labor cost of automation acceptance, and improve acceptance efficiency.
Based on the traditional automation system acceptance of intelligent substations, the iHT-SAAS2000 substation monitoring information automatic acceptance device is introduced by utilizing the entire station data model of intelligent substations and the consistency of the IEC61850 information exchange, to achieve automatic acceptance of the intelligent substation automation system.The hardware configuration of the iHT-SAAS2000 substation monitoring information automatic acceptance device is shown in Table .I. VGA interface 1

Composition modules of the system
This system mainly consists of several parts: model verification module, simulation main station function module, simulation substation function module, and simulation IEC104 communication module.

Model Verification Module
The model consistency verification function of the system verification function module is used to find and modify the consistency errors in the SCD model in the station, the remote machine RCD forwarding relationship file and the dispatching master station information point table in advance, and generative model the model consistency verification report after the consistency is passed.a.The correctness of the syntax and semantics of the substation SCD model files and RCD forwarding relationship files is verified.
b.The consistency between the SCD model file and the RCD forwarding relationship file is verified.c.The consistency between the RCD forwarding relationship file and the scheduling master site table file is verified.
d. Verification results can be exported and verification reports can be generated.

Simulation Master Station Function Module
The simulation master station function module is applied to the on-site acceptance stage of the substation monitoring information system.The simulation dispatch master station system communicates with the on-site remote machine through the IEC104 protocol, receives the on-site telemetry and remote signal information forwarded by the remote machine, and synchronously completes the acceptance work of the consistency between the on-site monitoring information and the dispatch master station system information during the on-site monitoring background acceptance, ensuring the consistency of the remote machine information collection, forwarding relationship, and 104 protocol communication.
The functions and characteristics of the simulation master station function module are as follows: a.It can communicate with the main and backup remote machines through both A and B networks using IEC 104 protocol and supports at least 4 remote control channels for simultaneous access and acceptance.We can view the communication status and messages of each channel in real-time.
b.The real-time log information of the communication status of each channel can be viewed in realtime, and this information can quickly and accurately locate problems that occur during communication and acceptance processes.Capable of real-time monitoring and saving the change information of all measurement points during the acceptance process to the database, and can be queried and displayed through data tables.
c.By comparing the consistency with the monitoring backend and on-site information, manually confirm the consistency of each measurement point information.When confirming, automatically record acceptance information such as acceptance personnel, confirmation time, real-time values, and store it in the database.During the acceptance process, the progress of acceptance and acceptance record information can be viewed at any time.
d.When the multi-channel forwarding information point table is identical, multi-channel linkage confirmation can be achieved.Remote control test commands can be issued through the human-machine interface, and password verification must be conducted when issuing remote control commands.After the acceptance is completed, an acceptance report can be automatically generated based on the acceptance records.

Acceptance stage of remote motors in the station
After the remote machine is configured, the RCD forwarding relationship file is exported and the master site information point table is provided.
The simulation master station module is used to improve the model file information of the configuration engineering project, import the RCD file and master station information point table.
The RCD static verification function of the simulation substation module's file comparison function is used, and a comparison file is manually added to verify the RCD forwarding file (compare the monitoring background description with the main station description through the 61850 short address) Closed loop verification of remote machine in the station: The simulation subsystem module of the automation acceptance device is connected to the simulated data of the remote machine, and then connected to the automation acceptance device through the IEC104 protocol after the remote machine conversion, forming a closed loop.The data collection, remote relationship conversion, and 104 protocol communication of the remote machine are tested to verify the accuracy and consistency of various functions of the remote machine, as seen in Fig. 1.

AVC and other system acceptance stages
During the operation of some systems, such as the AVC (Automatic Voltage Control) system, the AVC system requires telemetry and remote signal data provided by the SCADA system to provide data support as the basis for decision-making in the AVC system.When debugging the actual system, in order to cooperate with the verification of system functions, it is necessary to repeatedly increase the amount of on-site equipment, which takes up a large amount of manpower and material resources.Therefore, the simulation subsystem module function of the automated acceptance tool can be used to simulate the actual SCADA data based on the verification requirements of different functions of the AVC system, avoiding repeated operation of equipment during the debugging process and saving time for system debugging.
Similarly, in some other functions that require on-site SCADA system data support, such as the monitoring system optical license plate, for convenient verification, data simulation can also be conducted by simulating the substation function module to verify whether the changes in monitoring system data are in line with the actual situation.

Test results
To verify the effectiveness and accuracy of the testing design scheme, 220 kV Yanling Substation was selected as the testing object, and the testing equipment was used.Two testing demonstrations were conducted on August 12th and August 23rd, with two channels selected for each test.
The on-site test results of Channel 1 and Channel 2 on August 12th are shown in Fig. 2 (where, A, B, C, D, E represent "total", "Acceptance number", "Unaccepted number", "Number of acceptance passes", "Number of acceptance failures", respectively).By comparing the results of Channel 1 and Channel 2, it can be seen that the consistency rate of test data is 100%, and the reliability of automatic acceptance is demonstrated to be 100%.Through repeated testing in practice, the accuracy of automatic acceptance data has reached 100%, further demonstrating the feasibility and reliability of automatic acceptance in substations.With the integration of power grid regulation and operation, the amount of information transmitted to the main control station in substations has sharply increased.At the same time, the construction of the second plane of the dispatch data network and the construction of the backup main control station for dispatch automation has at least four channels for information transmission to the main control station in substations.The centralized monitoring personnel of the substation needs to conduct one-by-one acceptance of the correctness of the information of the four channels, which requires a large amount of acceptance work.The traditional substation monitoring information acceptance is triggered by the cooperation of maintenance personnel on the substation side, and the main station side acceptance personnel check and accept information with the substation side through the phone.The traditional acceptance mode is inefficient, and the efficiency of substation control information acceptance can be improved through the technical means of automatic acceptance in the substation.

Conclusion
Through research on the rapid debugging and automatic acceptance system of the substation comprehensive automation system, four functional modules were implemented according to different functional requirements, including the model verification module, simulation main station functional module, simulation substation functional module, and simulation IEC104 communication module.This greatly reduced the workload of the substation in the comprehensive automation debugging and acceptance process, and saved manpower and material resources, Thus, the automation level of the substation has been improved.

Fig. 1
Fig. 1 Architecture diagram of the dispatch master station system (a) Test Results of 220 kV Yanling Substation on August 12th (Channel 1) (b) Test Results of 220 kV Yanling Substation on August 12th (Channel 2) Fig. 2 Test results on August 12 th The on-site test results of Channel 1 and Channel 2 on August 23rd are shown in Fig. 3 (where, A, B, C, D, E represent "total", "Acceptance number", "Unaccepted number", "Number of acceptance passes", "Number of acceptance failures", respectively).By comparing the results of Channel 1 and Channel 2, it can be seen that the consistency rate of test data is 100%, and the reliability of automatic acceptance is demonstrated to be 100%.(a) Test Results of 220 kV Yanling Substation on August 23th (Channel 1) (b) Test Results of 220 kV Yanling Substation on August 23th (Channel 2) Fig. 3 Test results on August 23rd