The power grid dispatching automation system has three basic parts: control center, main station system, plant station end (RTU) and information channel. According to the different functions, the system can be divided into information collection and execution subsystem, information transmission subsystem, information processing subsystem and human-machine contact subsystem.
The basic function of the information collection and execution subsystem is to collect real-time information that characterizes the operating state of the power system at each power plant and substation. In addition, the system is responsible for receiving and executing operations, adjustments, or control commands issued by the superior dispatch control center.
The information transmission subsystem provides a bridge for information exchange for the information collection and execution subsystem and the dispatch control center. The core of the information transmission subsystem is the data channel, which is connected to the RTU and the main station front-end machine via a modem.
The information processing subsystem is the core of the entire dispatch automation system, with electronic computers as the main component. The subsystem contains a large number of computer application software directly oriented to the power grid dispatching and running personnel, completes various processing and analysis calculation of the collected information, and even realizes automatic control and operation of the power equipment.
The man-machine contact subsystem processes all kinds of information transmitted to the dispatch control center, and provides the dispatcher with complete and practical real-time information of the power system through various display devices, printing devices and other output devices. The remote control and remote adjustment commands issued by the dispatcher are also input through this system and transmitted to the actuator.
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