Motor Direct-drive High-voltage Circuit Breaker Servo Mechanism Path Dynamic Planning Method

The motor direct-drive high-voltage circuit breaker improves the controllability and reliability of the circuit breaker equipment, in order to further enhance the service life of the circuit breaker and the protection capability of the power system under safe operating conditions, this paper proposes a motor direct-drive high-voltage circuit breaker moving contact path dynamic planning method. First, based on the direct-drive three-phase permanent magnet synchronous motor high-voltage circuit breaker operating mechanism, geometric modeling analysis of its transmission mechanism, to establish the geometric relationship between the motor shaft and the circuit breaker moving contact. Then, the method of calculating the optimal move trajectory of the moving contact and the optimal motion curve of the motor shaft according to the actual position and limiting conditions of the breaker’s moving contact is elaborated in detail, and the corresponding simulation comparison is given. Finally, the proposed method is experimentally studied in the prototype platform, and the effects of the proposed method and the traditional preset curve method on the motion of the circuit breaker’s moving contact are analyzed and compared. The results show that the proposed dynamic planning method of the circuit breaker moving contact path can be based on the actual position of the moving contact, combined with control indicators and system limits real-time planning of the optimal track of the moving contact, the engineering realization is simple, compared to the preset curve method can effectively shorten the running time, and improve the service life of the circuit breaker, motor direct-drive high-voltage circuit breaker efficient dynamic control is a feasible and effective path planning strategy.