Abstract:A command strategy and system design scheme based on the centralized monitoring mode of 500 kV substation is proposed. The command strategy is divided into four situations: normal, fault, overhaul and emergency. It can improve the control of the on-site operation of the monitoring center under various conditions, improve the efficiency of emergency command, and ensure the safe and stable operation of the system. The monitoring center system adopts a relatively separate mode of the underlying platform and the upper layer application. Integrated data acquisition and processing functions, a common human-machine interface and flexible system interfaces are also provided. In order to meet the monitoring center's monitoring control, fault analysis, on-site operation interaction, emergency command and other requirements, substation centralized power monitoring system, protection and fault information management system, substation video and environment monitoring system and on-site operation mobile command system are designed. In the centralized monitoring mode of 500 kV substation, the command strategy and monitoring system scheme can realize unified and efficient interaction of data, realize monitoring service and remote control of each substation equipment, realize intelligent analysis and processing of fault alarms, and realize real-time video monitoring, voice interaction and emergency command and dispatch of on-site operations.