摘要
设计了一种基于精简指令集处理器(advanced RISCmachine,ARM)的时变限值无功补偿控制器。该控制器采用ARM处理器作为控制单元,通过网络控制芯片DM9000A实现控制器与数据采集与监控系统之间的数据通信,从而取代传统的A/D信号采集方式。在提出的控制算法中,以变压器分接头和电容器的最大动作次数作为约束条件,根据电网各时段的波动水平,使用分形和聚类算法实现电网补偿时段的划分。通过最优潮流算法计算出电网中各节点的最优节点电压和最优无功功率,并根据变压器的电压步长、电容器的容量计算出各个时段的电压和无功功率的上下限值,从而得到使用新限值的9区图判据。根据电网实时电压、无功功率,ARM使用9区图判据来判断当前电网工作点所处的工作区域,从而执行相应的补偿方案。实际运行的数据表明该装置降低了变压器分接头和电容器的动作次数,延长了变压器和电容器组的使用寿命。
An advanced RISC machine（ARM） based reactive power compensation controller with time-varying constraints is designed.The data communication between the compensation controller and SCADA is implemented by network controller chip DM9000A to substitute for traditional A/D signal acquisition.In the proposed control algorithm,the transformer taps and maximum action times of capacitor switchers are taken as constraints.According to voltage fluctuation levels in different time intervals compensation intervals of power network in one day are divided by fractal and clustering algorithm.Optimal nodal voltage and optimal reactive power are calculated by optimal power flow algorithm.The upper and lower limits of voltage and power in each time interval are calculated according to the voltage changing steps of transformer taps and the capacity of the capacitors.Thus a nine-zone diagram criterion is attained.to determine the location of the working point according to real-time voltage and reactive power of power network.The action times of transformer taps and capacitor switchers are judged by ARM to adopting corresponding compensation scheme.Actual operational data show that using the designed compensation controller the action times of both transformer taps and capacitor switchers are reduced,so the service life of both transformer taps and capacitor banks can be prolonged.
出处
《电网技术》
EI
CSCD
北大核心
2013年第2期460-465,共6页
Power System Technology
基金
山东省自然科学基金资助项目(ZR2011EEM024)
关键词
无功补偿
精简指令集处理器
网络通信
reactive power compensation
advanced RISC machine（ARM）
network communication
