中文摘要：

传统有源电力滤波器（active power filter,APF）基于逆变器拓扑,直流侧采用大容量电解电容器组作为储能元件,容易损坏,且价格昂贵。提出一种基于推挽正激式高频隔离交交变换器（insolated high frequency push-pull forward AC-AC converter,IHF-PPFAC）的IL-APF（inverter-less APF）结构,无需储能装置。分析了基于偶次谐波调制技术（even harmonic modulation,EHM）的单相IHF-PPFAC综合补偿原理;对补偿注入电流进行傅里叶级数分解分析其频谱特性,发现EHM耦合问题并提出非相邻调制波的解决方案;提出三相IL-APF结构,并建立了数学模型;同时设计了逐次谐波补偿策略（successive harmonic compensation strategy,SHCS）的闭环控制方案。仿真和实验结果验证了IL-APF的可行性,新装置没有使用直流储能元件,并实现了补偿电容器和电网侧的电气隔离;具有无功和谐波的综合补偿功能,适用于三相三线平衡系统。

英文摘要：

Traditional active power filter（APF） is based on inverter topology, damageable and expensive because of large-volume electrolytic capacitors in DC side as energy storage element. A novel APF based on insolated high frequency push-pull forward AC-AC converter（IHF-PPFAC） is proposed in this paper. Working principle of the novel APF based on even harmonic modulation（EHM） technique is analyzed. Fourier series decomposition is applied to study compensation characteristics. EHM coupling problem is discovered and solution is proposed. Mathematical model of the system is established. Closed-loop control program based on successive harmonic compensation strategy（SHCS） is designed. Results of simulation and experiment verify feasibility of the proposed novel APF. The device does not use DC energy storage components, thus electrical isolation between compensation capacitors and grid-side is realized. It can achieve comprehensive compensation of reactive power and harmonics, suitable for three-phase three-wire balance system.