35 kV新型混合有源电力滤波器的研究

Research on 35 kV Novel Hybrid Active Power Filter

针对一种由纯调谐无源滤波器(PF)、附加电感和有源电力滤波器(APF)构成的适用于35 kV的新型三相并联混合型APF系统进行研究。介绍了该系统滤波原理,建立逆变器等效数学模型。在此基础上,引入附加电感电压前馈解耦控制,有效改善了逆变器输出电流质量。对该结构稳定直流侧的基波电流相位获取方法进行了改进,提出一种直接进行电网电压矢量定向的相位获取方法。最后,搭建了仿真模型和实验平台,其结果证明了系统结构和控制策略的有效性和合理性。

A new shunt hybrid active power filter （APF） system which suitable for 35 kV power line is performed. The system consists of pure tuned passive filtcr（PF）, additional inductance and APF.The filtering theory is studied and the equivalent mathematical model of the inverter is established.On the basis of that,the feed-forward decoupling control of additional inductance voltage is introduced, which improved the quality of the output current of the inverter. Then, the method of obtaining the present fundamental current phase of stable DC side is improved.Further more, a novel theory of obtaining current phase based on virtual flux is proposed.Finally, a simulation model and experimental platform are built, and the results vertify the efficiency and rationality of the system structure and control strategy.