摘要
不平衡系统中配网静止同步补偿器D-STATCOM的控制是D-STATCOM的重要研究内容。提出一种根据FBD功率理论,以单位功率因数为补偿目标的D-STATCOM新型控制方法。该控制方法将目标电流进行序分解,对其正、负序分量分别转换到两个独立的旋转坐标系中,对正、负序电流的d轴和q轴分量分别采用比例-积分(proportional integral,PI)控制。由于正序和负序分量在相应的旋转坐标系中d轴和q轴分量均为直流,简化了控制器设计。该方法采用电网电流控制的闭环结构,直流侧电容电压的调节模块直接产生电流的参考值,不需要复杂的无功电流检测过程,控制系统结构简单。
Research on the control method for D-STATCOM is an important issue in distribution system. A novel control strategy for D-STATCOM is proposed in this paper. Choosing unit power factor as control target, the reference values of three-phase line currents are unbalance when line voltages are unbalanced, which makes controller design harder. The control method proposed adjusts positive and negative components of line currents independently through sequence component decomposition. Thus, the components of d-axis and q-axis are constant in synchronous reference frames of positive and negative components, which makes the control easier. Decoupled PI control is adopted to get fast response. The method can obtain line current reference values directly, so complex reactive power current detection isn＇t needed any more.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2007年第4期93-99,共7页
Proceedings of the CSU-EPSA
关键词
无功补偿
配网静止同步补偿器
解耦控制
不平衡
FBD功率理论
reactive power compensation
distribution static synchronous compensator （D-STATCOM） decoupled control strategy
unbalanced conditions
Fryze-Buchholz-Dpenbrock（FBD） power theory
