一种通用型电能质量控制器

A Novel Universal Power Quality Controller

为了适合电压型谐波源和电流型谐波源的滤波和无功补偿,同时具有传统有源滤波器的并联型结构,提出了一种基于复合控制的通用型电能质量控制器的新方案,理论分析表明该通用型电能质量控制器对基波进行动态无功补偿,对谐波相当于串联一个谐波高阻抗和并联一个谐波低阻抗,兼具疏导和隔离谐波的作用。论文还分析了系统的工作原理和控制策略,对其稳态工作特性进行了深入研究,探讨了其控制放大倍数与补偿性能的关系。仿真和实验结果证明了新型通用型电能质量控制器的可行性。

In order to cater for the filtering and reactive compensation of voltage-type harmonic source and current-type harmonic source,as well as the advantage of parallel topology of conventional active power filter,an universal power quali-ty controller based on hybrid control is proposed.In term of the principle analysis,the power quality controller can dynami-cally compensate the fundamental reactive power,and it has the role of series high impedance and parallel low impedance to harmonic so as to filter and isolate the harmonic.The operation principle and control strategy of the system and the steady state characteristics are analyzed in detail.The relationship between amplification coefficient and compensation performance is addressed.The validity of the theory is proved by the simulation and experimental results.