Research and Application of One-key Sequence Control Technology for Substations

. The substations are important parts of modern electrical grids. In this sense, it is necessary to enhance the management efficiency and robustness of the substations. The one-key sequence control technology system could simultaneously control several subsystems and make use of their functions to automatically operate the substations. In this study, three subsystems, i.e., monitoring subsystems, error analysis subsystem, and decision support subsystem are designed in the one-key sequence control technology system. All the background information from the substations is monitored, checked, detected to find the potential threats. The decision support subsystem provides suggestive ways to handle these problems. Therefore, through the reasonable use of the one-key sequence control technology, the overall effectiveness and efficiency of the substations can be enhanced. With the development of artificial intelligence technologies, the one-key sequence control technology system can be further improved with more powerful functions.


Introduction
The safety of modern electric grids is closely related to people's daily life. To improve the efficiency of the operation of electric systems, many intelligent substations have been built these years. The systems become more and more complex, which needs more human labors. Under this situation, the one-key sequence control technology provides a suitable way for the management of the large number of substations. Based on the one-key sequence control technology, the system could intelligently sense the states of the substations and adaptively make the responses. In the previous works, some researchers made efforts to enhance the automation level of the substations including automatic fault diagnosis, visualization, anomaly detection, etc. However, they only focused on single aspects and lack considerations on the whole system. Nowadays, the onekey control technologies have been a hot topic in the field of intelligent applications, which can be used in the management of substations. The one-key sequence control technology takes the systems in the substations as a whole and considers all the relevant operations and managements. Through the successful use of the one-key sequence control technology, the labor strength can be greatly relieved and the precision, effectiveness, and efficiency of the whole system can be improved.
In this paper, we research on the one-key sequence control technology of the substations. First, the components and overall design of the one-key sequence control technology are discussed. From the aspect of components, the one-key sequence control technology system should include the monitoring subsystem, error analysis subsystem, decision support subsystems, etc. These subsystems work based on the background information from the substations and detect the anomaly in the data flows. When an error occurs, the one-key sequence control technology system could quickly locate it and find a suitable way to handle it, which guides the workers to make correct decisions. Second, the operation procedure of the one-key sequence control technology is explained, which sequentially unitizes different subsystems to perform different jobs. The one-key sequence control technology employs all the subsystems as a whole so the effectiveness can be fully played. Finally, some newly popular new technologies in the field of artificial intelligence are discussed, which have potential in the one-key sequence control technology substations.

Monitoring subsystem
The monitoring subsystem monitors the background information in the substations. As there is a large amount of information, the monitoring subsystem classify it into several categories. For example, the information can be divided into ones related to hardware, software, operating system, networks, etc. In addition, this subsystem also provides interfaces for the workers so they can observe the system states intuitively. The important information can be highlighted to help the workers catch the key conditions of the substations. The monitoring subsystem operates unstoppably to sense all the states of the substations and provide information for other subsystems.

Error analysis subsystem
Based on the labeled information from the monitoring subsystem, the error analysis subsystem detects the anomaly from the data flows in each category and make analysis. According to the historical data from the substations, the abnormal data flows can be detected using anomaly detection algorithms. Furthermore, the detected anomaly is identified with a more concrete type and fed back to the works. The works can find the problems and the related component. Then, they can take corresponding measures to handle the problems

Decision support subsystem
The decision support subsystem makes more detailed analysis on the reported anomaly and errors in the error analysis subsystem. The detected anomaly is analysed using some artificial intelligence technologies and determine its type. Based on the historical data and some expert system, the decision support subsystem could provide some reasonable advices for handling the present problems. These advices will be reported to the workers to support them make decisions. Also, the system could record these error events to further learn a more robust supporter.

Operation Procedure of One-key Sequence Control Technology
The one-key sequence control technology system operates based on the functional subsystems. All the subsystems are considered in a unified framework to fully make their effects. Fig. 1 shows the general procedure of the operation of the one-key sequence control technology system, which could be summarized as following steps: Step 1: The monitoring subsystem checks the data flows from the substations and classify them as several categories.
Step 2: The error analysis subsystem detects the anomaly from the dataflows and locate them. The results are reported to the decision support subsystem.
Step 3: The decision support subsystem identifies the reported error from Step 2 and provides suggestive ways to handle the problem.
Step 4: The whole system recorded the whole event to further strengthen the capability.
Through the iteration and repetitive learning, the onekey sequence control technology system will be more robust and effective. All the subsystems operate automatically to monitor the data flows, detect the potential threats and locate the true errors. So, the onekey sequence control technology system could help the workers quickly solve the problems occurred in the substations.

Historical data
Monitoring subsystem

Error analysis subsystem Anomaly
Decision support subsystem Input data Solutions Artificial intelligence Fig. 1 General procedure of the one-key sequence control technology system in the substations.

Conclusion
This study researches on the one-key sequence control technology of the substations. In the one-key sequence control technology system, the monitoring subsystem, error analysis subsystem, and decision support system work cooperatively to find the potential problems occurred in the substations while providing reasonable ways to handle them. With the help of the one-key sequence control technology system, the workers could greatly enhance the working efficiency and quickly solve the problems. In the future, more artificial intelligence technologies could be applied to the one-key sequence control technology system such as deep learning, big data, etc. With better learning capabilities, the system could be more robust and effective.