Design and application of synchronous control system model of high voltage and large capacity series parallel structure of a vacuum circuit breaker

With the continuous increase in the capacity of power grid, grid short-circuit current level problems have become increasingly prominent, the level of the current level of the existing manufacturing parameters of high voltage circuit breaker can not meet the requirements based on. This paper introduces a design unit of vacuum circuit breaker series of large capacity and high voltage circuit breaker based on parallel structure, the circuit breaker will first 40.5kV control unit vacuum circuit breaker by equalizing components series become high voltage circuit breaker HOkV, while using the hollow with high coupling degree, the normal working state of low energy consumption Division reactor, integrated control can effectively realize the automatic current sharing and the current limiting function, increase, circuit breaker rated current and the ability to withstand short circuit current. In the vacuum circuit breaker field created a new idea, in the parameter index reached a new height. The series parallel structure, due to the existence of more or less the difference between multiple fracture, cause in the process of breaking large fault current in the voltage between the fracture, the uneven distribution of current, this very high demands on the control accuracy of synchronous control system. Synchronous control system design and Realization of a multi fracture controlled vacuum circuit breaker, the hardware with digital signal processor (DSP) TMS320LF2812 and the field programmable gate array (FPGA) SPARTAN3 as the core, the bus backplane and function hardware architecture combines plate; the software realization of voltage and current zero crossing detection method, design the control system of vacuum circuit breaker with optical fiber communication protocol, the synchronization control algorithm. Considering the actual run-time synchronization controller operating in the complicated electromagnetic environment, the whole control system to carry out a number of st- ict EMC test, the results show that the system has high reliability and stability.