一种大容量的串联型有源电力滤波器  

A Series Active Power Filter with Large Capacity

作　　者：陈乔夫[1] 李达义[1] 熊娅俐[1] 张长征[1] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北省武汉市430074

出　　处：《电力系统自动化》2005年第1期73-76,共4页Automation of Electric Power Systems

基　　金：台达电子科教发展基金资助项目(2003)。

摘　　要：为了能制造出大容量的串联型有源电力滤波器,提出了在串联变压器二次侧设计有多个绕组,每个绕组配置一个逆变器单元。该单元向相应的二次侧注入幅值相同、相位相反的基波电流,在补偿系数等于1或略大于1时,在串联变压器一次侧对基波呈近似为0的阻抗,而对谐波呈现高阻抗,从而迫使谐波流入无源支路。实验结果证明了原理分析的正确性。A novel transformer structure with multiple secondary compensation windings is proposed in order to solve a series active power filter with large capacity. Multiple PWM inverters are connected with the multiple secondary winding. The PWM inverters are applied to produce fundamental currents, which are injected the multiple compensation secondary windings. The injected fundamental currents and the fundamental current component of the power utility are the same in frequency and inverse in phase. When the overall injected fundamental current of the secondary compensation windings and the fundamental current component of the power utility satisfy fundamental compensation condition or the compensation factor is just slightly greater than 1, the series transformer can really exhibit very low impedance for fundamental and naturally magnetizing impedance for harmonics. Simulation proves the validity of the new transformer structure.

关 键 词：有源滤波器 基波 磁通 大容量 多绕组 

分 类 号：TN713[电子电信—电路与系统]