新型注入式HAPF谐波电流及直流侧电压控制新方法

针对注入式混合有源滤波器中无源与有源部分补偿效果叠加、补偿谐波电流在经过注入支路和输出滤波器之后会产生一定的相位和幅值偏差，以及基波谐振支路的存在使得必须通过添加整流桥的方式获取直流侧电压从而难以保持直流侧电压的稳定等问题，提出了一种改进结构的新型谐振注入式混合型有源滤波器(hybrid active power filter，HAPF)，使直流侧电容能够与电网产生能量交换。在此基础上结合提出的基于基波无功电流闭环调节的直流侧电压控制方法，保证了直流侧电压的稳定；提出了采用递推积分将无源滤波器作用后电网谐波电流与注入支路补偿电流进行闭环比较控制以获得参考电流的方法，减小了误差，提高了系统的控制精度。实验及仿真结果证明了所提出控制方法计算量较小，在响应时间和控制精度上都具有一定优势，能够满足系统的要求。

Novel Current and DC-side Voltage Control Methods Used in New Resonance Injection Type HAPF

The effect of active and passive part will overlap, and amplitude or phase of injection current will change after it flow through the injection branch and output filter when injection type hybrid active power filter is used. Furthermore, rectifier is usually used to provide DC-side voltage for the existence of fundamental resonance circuit, it leads to a great fluctuation in DC-side voltage. To solve the above problems, a novel resonance injection type hybrid active power filter is presented, it allows the energy exchange between the DC-side capacitor and grid, DC-side voltage will be stabilized after the proposed control method base on the regulation of reactive current is adapted. On the other hand, a new current control method is proposed which is based on the control of error between injection current and harmonic current compensated by passive power filter using recursive PI. Simulation and experiment results have shown that the proposed control methods have high control precision, high response speed and small computation capacity.