配永磁机构的真空断路器同步分合闸控制系统设计与实现

为减少电力系统中断路器投切无功补偿电容器组时产生的电磁暂态效应,研究了一种配永磁机构的真空断路器同步分合闸控制系统;给出了中性点不接地星形方式连接的并联电容器组的同步分合闸控制策略,以数字信号处理器(DSP)为核心设计了同步分合闸控制系统的原理样机,给出了同步分合闸控制算法流程.通过分析影响永磁机构动作时间的因素,研究了同步分合闸控制的关键技术,包括设计FIR数字滤波器以准确提取系统电压电流过零点、径向基函数神经网络(RBF)预测控制、机构老化与触头磨损的自适应补偿控制等.最后给出并分析了同步分合闸控制精度的实验结果.实验结果表明,同步分合闸操作时的动作分散性基本保持在±0.5 ms以内.

Design and implementation of synchronous switching control system for vacuum breaker with permanent magnetism actuator

In order to reduce the electromagnetic transient effect caused by the circuit breaker switching for reactive power compensation with capacitor groups in power system,a synchronous switching control system of vacuum circuit-breaker with permanent magnetic actuator is developed. A concrete synchronous switching control policy of neutral non-grounding and star-type connected shunt capacitor groups is presented,a prototype of synchronous switching control system with DSP as its kernel is developed,and the flowchart of synchronous switching algorithm is given. The influencing factors of actuator action time is analyzed and the key technologies are studied,including the design and implementation of digital FIR filter,the predictive control of Radial Basis Function neural networks, the adaptive compensation for mechanism aging and contactor wear,etc. The experimental results of synchronous control accuracy are analyzed,which show the synchronous control error is within ±0.5 ms.