双谐振注入式混合有源电力滤波器及控制方法

Novel Active Power Filter with Double-resonance Injection Circuit and Its Control Strategy

提出了一种新型双谐振注入式混合有源电力滤波器(DIHAPF),注入支路由基波串联谐振支路和并联谐振支路组成,在保证补偿谐波电流注入能力的同时,避免了单谐振注入式混合有源电力滤波器(SIHAPF)高压配电网应用时容易无功过补的问题;建立了适用于高压配电网的注入式混合有源电力滤波器(IHAPF)的通用电气模型,给出了注入支路参数设计依据;此外,提出了一种适用于DIHAPF的基于广义积分预处理的比例积分(PI)控制方法,通过对负荷侧电流进行广义积分预处理获得电压参考信号,对有源部分交流侧输出电压进行闭环控制。实验及仿真结果证明了所提出的新型双谐振注入支路有效提高了IHAPF的应用电压等级,该控制方法在保证谐波电流控制精度与动态响应速度的同时,大大简化了控制计算过程,易于工程实现。

A novel injective type hybrid active power filter with double-resonance injection branch（DIHAPF）is proposed.The injection branch of DIHAPF consists of a fundamental series resonant circuit and a parallel resonant circuit.Compared with injective type hybrid active power filter with single-resonance injection branch（SIHAPF）,the proposed system can avoid the reactive power overcompensation and guarantee the current injection ability at the same time.A universal electric model of injective type hybrid active power filter（IHAPF）suitable for high power grid is founded.Based on the analysis of the model,the parameter designing principle of injection branch is proposed.Furthermore,a novel PI control strategy based on improper integral preprocessing is proposed.The reference voltage signal is produced by improper integral preprocessing from the load current signal.Output voltage control is implemented instead of current tracking control.Experiment and simulation results show that the novel DIHAPF extends the voltage grade of IHAPF application,and the novel control method is easy to be realized.