三相四线有源电力滤波器的三闭环控制策略  

Three closed loops control strategy of three-phase four-wire active power filter

作　　者：郑丹[1] 廖敏[1] 刘振权[1] 李云祥[1] 沈志达[1] 杨继深[1] 

机构地区：[1]中国航天科工集团第二研究院706所,北京100854

出　　处：《电力系统保护与控制》2014年第22期95-99,共5页Power System Protection and Control

摘　　要：为解决三桥臂电容中点式三相四线有源电力滤波器存在的上下桥臂直流侧电压不平衡的问题和启动过程中直流侧电压超调的问题,提出一种三闭环控制策略。通过分析直流侧电压对控制系统的影响,纹波产生的原因,提出直流侧电压的控制指标。在分析直流侧电压与能量交换的关系的基础上,提出一种直流侧电压均压控制方法。针对直流侧总电压在启动过程中的超调问题给出解决方案,给出一种软启方案控制超调,并在大负载和小负载两种情况提出不同控制方案。最后通过实验数据,对这些控制方案进行了验证。To deal with DC voltage unbalance on two arms and the total DC voltage overshoot during startup, three closed loops control strategy of three-phase four-wire active power filter （APF） is shown. The influence of DC voltage on the APF and the origin of DC voltage ripple is analyzed. Besides the DC voltage control targets are presented. Based on the relationship of DC voltage and energy exchange, a method of DC voltage balance on two arms is proposed. A solution is given about the total DC voltage overshoot during startup. As the difference under heavy load and light load, control strategies are selected respectively. At last, experiment is done to verify the principle above.

关 键 词：电力有源滤波器 三相四线 直流侧电压控制 直流侧均压 

分 类 号：TN713.8[电子电信—电路与系统] TM761[电气工程—电力系统及自动化]