Development of the Phase Selection Controller for Parallel Compensation Permanent Magnetic Mechanism Circuit Breaker

　　Development of the Phase Selection Controller for Parallel Compensation Permanent Magnetic Mechanism Circuit Breaker
　　Along with the development of distribution automation system, more requests have raised in the reactive balance. As the terminating equipment in the power system, the reliability and the intelligent level of the circuit breaker affect the stability and automatization Ball Neodymium Magnets of the power system.At first, the paper introduces the principle of the controller’s design, and then put forward the microcomputer mode for realizing the permanent magnetic actuator control. And it analyses the equipment of Reactive Compensation in general use at present. It rased an intelligent synchronize controller based on monostable permanent magnetic and GSM technology.The design makes microcontroller PIC16F877A of Microchip Corporation as central processor. The hard platform mainly includes peripheral interface circuit, analog signals sampling module, communication module, power module and structure driving module.
　　According to the characteristic of permanent magnetic actuator in vacuum circuit breaker, it designs the circuit for driving the actuator to close and measuring the voltage of capacitance linearly. In software, it applied in Single Chip Micyoco C language, in http://www.chinamagnets.biz order to convenient the software compile and upgrade in future. And it compiles the application software including drive the actuator to close or open, electric parameter sampling, the algorithm of line selection and communication. At the same time, it gives the steps of resolution on reliability.At last, the paper designs the experiment scheme to validate the main function of the drive, fault line selection and GSM communication, then analyses and compares the result.The paper is completed in hardware circuit, emulation, the correlative programmer and arithmetic and debug. The controller realizes the main function in design. The research and experiment result proves that: the design structure of controller is reasonable and modularized, to satisfy the technology request. It has well reliability and practical.