统一电能质量调节器(UPQC)的补偿控制策略研究

针对日本学者Akagi.H提出的补偿控制策略,分析了系统的稳态特性和跟踪特性,发现该补偿控制策略容易引起系统的高频振荡,仿真结果进一步证明分析结果的正确性。为了抑制系统补偿过程中的高频振荡,提出了一种新的补偿控制策略,该控制策略是对Akagi.H的补偿控制策略的改进,对并联有源电力滤波器采用检测安装点电压与检测系统电流复合控制策略,理论分析与仿真结果表明,该控制策略可较好地改善系统的高频特性。

Research on compensation control strategy of unified power quality conditioner

The theoretical analysis of stationary state and tracing characteristics of UPQC based on the compensation strategy presented by Akagi.H is given in the paper. It is demonstrated by digital simulation that the theoretical analysis results are correct and the UPQC based on the compensation control strategy can cause high frequency resonance. In order to erase the resonance, the improvement for the compensation strategy which is that coupling point voltage detection and supply current detection are simultaneously employed by shunt active power filter is proposed. The theoretical analysis and simulation result demonstrate that the compensation control strategy can improve the high frequency resonance.