基于自适应逆控制的有源滤波器合成阻性负载

电力系统电网电压总存在畸变和不平衡，有源电力滤波器(Active power filter, APF)对谐波和无功进行补偿时，采用传统的正弦电流合成(Sinusoidal Current Synthesis，SCS)方法，公共连接点处的电压畸变会导致谐波传输的问题。而采用阻性负载合成(resistive load synthesis，RLS)方法，补偿后的主电流与实际的电网电压具有相同的波形，系统特征表现为阻性，可以有效的阻尼系统中的谐波传输。文中将自适应逆控制的方法应用于APF的控制来合成阻性负载，在补偿谐波和无功的同时，阻尼系统的谐波传输,将系统的功率因数校正为1。采用自适应逆控制方法，不需要知道广义有源滤波器的确切参数，逆控制器系统可以自动跟踪电路参数而实时建模。仿真和实验结果证实所提出的算法的有效性。

Shunt Active Power Filter Synthesiszing Resistive Loads Based on Adaptive Inverse Control

The mains voltage distortions and unbalanced are present in the power distribution system. The power active filter(APF) is used to suppress the harmonics and compensate the reactive power. The traditional method of the sinusoidal current synthesis(SCS) can deteriorate the distortion level of the voltage in the common coupling, thus result in the harmonic propagation. The method of the resistive load synthesis(RLS) can compensate the mains current in phase with the mains voltage. The character of the system is a resistive load. The harmonic propagation in the distribution is damped out efficiently. The adaptive inverse control is used to control the APF to synthesis the resistive load. The harmonic propagation can be damped as well as the harmonics and reactive power can be compensated. The power factor can be corrected to unity. With the proposed algorithm the parameter of the generalized APF is not known exactly. The inverse system can adapte to the change of the parameters to build the APF model. The simulation and experiment results confirm the validity.