STATCOM的虚拟磁链定向矢量控制策略

Virtual Flux Oriented Vector Control Strategy of STATCOM

针对传统电流控制方法在静止同步补偿器(STATCOM)无功补偿方面存在的问题,提出了一种新的基于虚拟磁链定向的矢量控制(VFOC),将其基本思想应用在电网电压控制中。详细论述了VFOC的控制原理,将STATCOM的各状态方程在虚拟磁链定向矢量坐标系中体现出来,通过算法实现对并网逆变器输出无功和有功功率的控制。仿真和实验结果表明基于VFOC的STATCOM具有良好的动态性和实用性,无功补偿效果良好,使得以空间矢量脉宽调制(SVPWM)控制为代表的电流控制方式的缺陷得到了很好的弥补。

For defects of traditional control methods in the static synchronous compensator（STATCOM） reactive power compensation, virtual flux vector orientation control （VFOC） is proposed, the basic idea of vector control grid voltage is applied to control.The control principle of VFOC is discussed, various state equation of STATCOM in the virtual flux oriented vector coordinates is reflected, and inverter output reactive power and active power is controlled by algorithm. Through simulation and prototype used in supply network, results show that STATCOM based on VFOC has good dy- namic and practical, having good effect in reactive power compensation, and deficiencies of the current control mode represented in space vector pulse width modulation（SVPWM） control has been well compensated.