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中文摘要：
由于中性线参与了实际的控制，使得三相四线有源电力滤波器（APF）电流检测与控制更为复杂，同时APF直流侧电压的稳定控制也更为困难。为有效地检测四桥臂三相四线APF的参考补偿电流以满足实现对APF的有效控制并对各类非线性负载电流实施实时补偿，在分析了四桥臂三相四线APF工作原理的基础上，采用Takagi-Sugeno（T—S）模糊控制的方法，以直流侧电压的三值输入逻辑规则对四桥臂三相四线APF进行建模，利用并行分布补偿算法获得模糊控制律，在此基础上设计了模糊控制器，实时准确地获得四桥臂三相四线APF在各种非线性负载条件下的补偿参考电流并使直流侧电压得到自动稳定控制。仿真及实验结果验证了该控制策略的正确性及有效性。
英文摘要：
Accompanies with the control of the neutral line, currents detection and system control of the three-phase-four-legs active power filter （APF） seems more complexity, while stabilization of the APF DC voltage shows more difficult to control. Mean to obtain the compensated referenced currents of the APF effectively for satisfy its working condition in all kinds of nonlinear loads, based on the analysis of three-phase-four-legs APF with working principle, a novel fuzzy control strategy in Takagi-Sugeno （T-S） model is proposed with three-values logics inputs of the DC voltage. The fuzzy controller was designed by the arithmetic of parallel distributed compensation, the compensation referenced currents of the APF were obtained and the system was feedback controlled that the DC voltage stabili- zation automatically. Simulations and experimental results verify the correctness and validity of the control strategy described.
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