Abstract: This article introduces a substation safety protection and integrated management information system, which adopts a CANBUS-based hardware and software solution, effectively promoting the modernization and standardization of substation management. This article discusses the development of the substation safety protection and integrated management information system based on the successful operation of this system at the Xuchang Xuepo 220kV substation. Keywords : substation safety, MIS , CANBUS Currently, comprehensive computer management of substations has become an important means to improve the operation and management level of substations. Many substations have begun to explore and implement computer management. However, due to certain technical limitations, most substation integrated management information systems are still purely software systems. Their management programs mainly record operations and do not have automatic real-time data transmission. Various required real-time data can only be manually viewed and entered into the computer. Automatic extraction of real-time data and automatic statistical analysis of real-time data are almost impossible. This is a static management information system that is not connected to SCADA systems, five-prevention systems, or intelligent simulation panels. It does not play its due role in daily management and data processing. Our newly developed new generation of substation safety protection and integrated management information system based on CANBUS adopts fieldbus control technology, an open network structure, and embeds a microcomputer anti-misoperation system, intelligent simulation panel control, dispatch order input, and voice analysis system. It is connected to SCADA, global MIS, and the Internet, realizing maximum information sharing. This makes the system powerful, highly reliable, and has extremely high application value. 1. System Composition The system consists of a management workstation, an intelligent simulation screen, a microcomputer-based anti-misoperation operating system, a dispatch order input and voice analysis system, and various network bridges. The system composition is shown in the figure. CANBUS is a serial communication network using a short frame structure, with each frame containing 8 effective bytes, resulting in short transmission time and a low data error rate. When a node experiences a serious error, it has an automatic shutdown function, cutting off the connection between the node and the bus, ensuring that other nodes on the bus and communication are unaffected. It has strong anti-interference capabilities and, compared to other communication methods, offers higher reliability, real-time performance, and flexibility. The intelligent simulation screen control automatically synchronizes the simulation screen status with the screen status of the primary wiring diagram in the computer. The microcomputer-based anti-misoperation operating system provides multiple ticket issuance methods and enforces mandatory interlocking of equipment, effectively preventing misoperation accidents. Under the control of the dispatch order expert system, the dispatch order input and voice analysis system analyzes dispatch orders in conjunction with the real-time status of the substation, effectively preventing mis-dispatch accidents. 2. System Design Principles The system underwent thorough research during its design and development, adhering to relevant regulations issued by the Ministry, such as the "Electric Power Safety Work Regulations," "Substation Operation Management," and various professional regulations. Combined with the actual situation of the power bureau, the system was designed based on principles of standardization, advancement, practicality, reliability, openness, and scalability. This ensures the system fully conforms to the actual situation of China's power system and can meet the actual needs of various types of substations in China. 3. System Function Overview 3.1 The Operation Management Subsystem includes: operation records, pre-shift meeting management (work reporting and arrangement), equipment inspection management (peak-hour inspection, shift handover inspection, lights-out inspection, special inspection), shift handover summary management, and shift handover signature management. 3.2 The Operation Management Subsystem includes: power outage application management (application, approval, extension, termination, cancellation), dispatch operation command management (pre-order, activation order, termination, cancellation), and automatic generation and rehearsal management of operation tickets. 3.3 The maintenance management subsystem includes: one type of work order management (issuance, authorization, modification, extension, termination, cancellation), two types of work order management (issuance, termination, cancellation), dual-order statistics, and equipment maintenance and testing management. 3.4 The relay protection management subsystem includes: protection setting management, circuit breaker fault tripping management, high-frequency protection exchange signal management, and relay protection and automatic device commissioning record management. 3.5 The equipment management subsystem includes: equipment ledger management, equipment rating management, equipment reliability management, equipment defect management, main transformer tap changer operation management, surge arrester operation management, tool management, drawing and data management, and maintenance work management. 3.6 The production management subsystem includes: employee file management, shift rotation management, labor attendance management, personnel training management, and document management (superior notices, station notices, safety notices, etc.). 3.7 The remote transmission system for dispatch orders and work orders enables the remote transmission of dispatch orders and work orders. With the help of the Internet, dispatch orders and work tickets can be issued remotely, realizing two-way information transmission and greatly facilitating information exchange between distant points. 3.8 Remote Online Service Station With the help of the Internet, the system can connect to the server of Wuhan Taike Power Safety Co., Ltd. to track and check the operation of the user system. Adjustments to the system can be made directly on the server of Wuhan Taike Power Safety Co., Ltd. according to user requirements and transmitted to the user end in a very short time, providing users with first-class high-quality and fast service. 3.9 The Five-Prevention Subsystem Introduces microcomputer-based error prevention into the substation integrated management information system, making the five-prevention subsystem more in line with substation management standards; it increases the number of work ticket issuance methods, ensuring the correctness of work tickets; through the forced interlocking of primary equipment, it further ensures the safety of switching operations; through the return of computer keys, it ensures that the status of disconnectors (virtual remote signaling) in the system is consistent with the status of field equipment. 3.10 Dispatch Order Expert Subsystem Current five-prevention systems generally cannot judge the correctness of dispatch orders, thus failing to prevent erroneous operations caused by mis-dispatch. The dispatch order expert subsystem, through analysis of dispatch orders and combined with the actual operating status of the substation, can effectively determine the correctness of dispatch orders. For example, if a line is under maintenance and the work ticket has not been completed, and the dispatcher issues an order to energize the line (erroneous dispatch), the dispatch order expert subsystem can judge this, provide prompts and alarms, and enforce interlocking. 4. Example of System Operation in the Field Since its commissioning at the Xuchang Xuepo 220kV substation, this system has greatly improved the substation's work efficiency and reduced the workload of operating personnel. The system has an embedded commonly used vocabulary library and predefined a large number of reusable data modules, avoiding repetitive data entry; data can be selected with the mouse when needed. The system uses different colors to represent different situations, making the work progress clear to managers. The system automatically fills in the operation record when performing certain management tasks, improving work efficiency. Remote transmission of dispatch orders and work tickets shortens the time and space distance. Automatic acquisition of real-time data and automatic generation of operation tickets reduce the workload of management personnel. The system can easily and flexibly query, analyze, and statistically analyze data from previous years. This system possesses strict logical control functions, effectively preventing operational errors. It controls management activities with logical sequences. For example, a power outage application cannot be postponed or terminated without prior approval; it can only be approved or voided. A dispatch order cannot be issued without a pre-order. Multiple dispatch orders are executed step-by-step by computer. The pre-rehearsal of operation tickets verifies the correctness of each ticket to prevent erroneous operations. The system has an automatic prompting function during operation; it records daily work and its completion status, allowing operators to clearly understand power outage applications, dispatch orders, one or two types of work tickets, and the status of incomplete operation tickets. The microcomputer-based error prevention system implements mandatory interlocking for switching operations, and the computer key serves as an operational guide. 5. Conclusion With the continuous development of computer technology, communication technology, and management system theory, substation safety protection and integrated management information systems will inevitably improve and become more sophisticated. The substation safety protection and integrated management information system is an important component of the power enterprise management information system. Researching it is of great significance for strengthening safe production, improving labor efficiency, reducing labor intensity, and thus improving the safety level and efficiency of power production enterprises.