一种新型的四桥臂三电平并联有源电力滤波器的空间矢量控制策略

A Novel Space Vector Control Strategy of Four-leg Three-level Shunt Active Power Filter

提出一种新型的四桥臂三电平并联有源电力滤波器(APF)的空间矢量控制策略。基于参考电压分解的方法将复杂的开关矢量的选择问题简化为四桥臂两电平APF的空间矢量控制和四桥臂三电平APF的一个开关状态选择2个部分进行解决,从而解决了现有的控制策略普遍存在的计算复杂的问题。所提出的控制策略具有需要的采集量少、易于硬件实现的特点。通过具体仿真计算结果表明所提出的方法控制效果良好,具有较高的实用价值。

A novel space vector control strategy is proposed for four-leg three-level shunt active power filter（APF）. Based on the reference voltage decomposition, the complicated switching states selection problem is simplified into a simple two-level space vector eontrol problem and a simple three-level switching state selection problem. Thus the complicated calculating problem of present strategies is resolved. This strategy needs fewer input data, and is very easy to be implemented by the existing hardware. The simulation results of an example show that the proposed strategy has well control effects and can be used in practice.