High-voltage self-adaptive region automatic bus transfer system and automatic bus transfer control method thereof

Due to 500 kV and 220 kV system electromagnetic looped network operation, the short circuit current level of the whole system is increased, the thermal stability limit is reduced, and the adoption ofa 220 kV power grid open-loop operation mode is quite necessary. After loop opening, the adoption of region automatic bus transfer is an effective mode for ensuring power supply reliability. The self-adaptive region automatic bus transfer comprises a transformer station A, a transformer station B, a region automatic bus transfer logic discrimination device, an acquisition execution unit and a power supply system main wire. By collecting reasonable analog quantity criteria, setting interval maintenance pressing plates and remotely transmitting information, self-adaption and region automatic bustransfer functions are achieved, various power grid structures and operation modes are met, a good engineering application value is achieved, and great significance is achieved for improving the reliability of a power grid. 5