模糊控制理论在UPFC控制器设计中的应用

将模糊控制理论应用于UPFC控制器的设计中，设计了主、辅两个模糊控制器．其中主控制器以UPFC串联侧输出电压的横向分量和纵向分量分别控制线路的有功与无功，以并联侧输出电流的横向分量和纵向分量分别控制节点电压和直流侧电容电压，而辅助控制器以线路功率作为反馈输入，采用了带自调整因子的控制策略．为了简单起见，在模糊控制器的设计中，对控制器输入量的模糊化和输出量的清晰化都采用了非均匀变换的方法．仿真结果表明：所设计的UPFC模糊控制器及辅助模糊控制器可以很好地提高系统的功角稳定性并改善电压质量．

Apply the fuzzy control theory to design UPFC controller

The fuzzy control theory is applied to the UPFC.The major and the supplementary fuzzy controllers are designed.The major controller uses horizontal and vertical components of the series output voltage and shunt output current to control the active and reactive power flow of the line and the voltage of the node and capacitor.The supplementary controller uses the power flow as controlling input.The rule with the self-adjustable factor is adopted.Furthermore,in the devise of fuzzy controller,the ununiformity transform is used for easy fuzzifier and defuzzifier.Computer test results show that the fuzzy controller and supplementary fuzzy controller of the proposed UPFC can greatly improve the stability of the system's power angle and the quality of the voltage.