一种应用于多断口光控真空断路器的同步控制系统的设计与实现

摘要

Higher breaking capacity can be obtained by using multi similar optically controlled vacuum circuit breakers to create a multi-break vacuum circuit breaker in the form of series/paralel,while the excelent properties of short vacuum gap could be made full use of.It can cause uneven distribution of voltage and current between the breaks in the process of breaking large fault current.It raises a very high request to the accuracy of the synchronization control system can provide.In order to solve this problem,a synchronous control system for multi-break vacuum circuit breaker is designed and implemented in this paper.The hardware is based on the digital signal processor (DSP) TMS320LF2812 and thefield programmable gate array(FPGA) SPARTAN3 as the core,and the bus backboard and function board is used as the hardware architecture.In the aspect of software,the voltage and current zero detection algorithms are realized,the communication protocol between control system and vacuum circuit breaker is designed,and the synchronization control algorithm is improved.Because the actual operation of synchronous controller operates in the complex electromagnetic environment,a number of strict electromagnetic compatibility tests are conducted for the whole control system,and the results show that the system has high reliability and stability.%将多个性能接近的光控真空断路器采用串/并联的形式组成多断口真空断路器,在获得更高开断容量的同时,充分利用了短真空间隙的优良特性.在开断大故障电流的过程中,会造成各断口之间电压、电流分配不均,这对同步控制系统的控制精度提出了非常高的要求.针对这一问题,设计与实现了一种多断口光控真空断路器的同步控制系统,硬件上以数字信号处理器(DSP)TMS320LF2812与现场可编程逻辑阵列(FPGA) SPARTAN3为核心,采用母线背板与功能插板结合的硬件架构;软件上实现了电压电流零点检测算法,设计了控制系统与光控真空断路器的光纤通信协议,完善了同步控制算法.考虑到实际运行时同步控制器运行于复杂电磁环境中,对整体控制系统进行了多项严格的电磁兼容实验,结果表明所设计的系统具有较高的可靠性和稳定性.