摘要
提出一种改进的有源电力滤波器(APF)的电源电流直接控制方法。通过检测负载电流,利用负载电流检测结果进行前馈补偿校正并提取其中的有功电流作为APF控制器的参考值。同时,通过电网电压前馈和系统解耦,把电源电流直接控制的APF数学模型简化成一阶惯性环节。相对于把负载电流作为干扰不进行检测的电源电流直接控制方法,所述方法的比例—积分控制器在理论上就能做到无静差跟踪,并且具有更好的动态响应。仿真和实验证明了所提方法的优越性。
An improved supply current direct control scheme of active power filter (APF) is proposed. By detecting load current, the detect result can be used to feed-forward and extract the active load current as reference value for the APF controller. By using grid voltage feed-forward and system decoupling, the mathematical model is simplified to a first-order inertia model. The proportional-integral (PI) controller can track the reference value with no state error in contrast to the supply current direct control scheme of APF without load current detecting and have a better dynamic response. Simulation and experimental results show the correctness of the method. This work is supported by National High Technology Research and Development Program of China (863 Program) (No. 2007AA05Z230) and Forward-looking Orientation Program of China University of Petroleum (No. 2010QZ03).
出处
《电力系统自动化》
EI
CSCD
北大核心
2012年第24期79-83,88,共6页
Automation of Electric Power Systems
基金
国家高技术研究发展计划(863计划)资助项目(2007AA05Z230)
中国石油大学(北京)前瞻导向基金资助项目(2010QZ03)~~
关键词
有源电力滤波器
电能质量
瞬时无功功率理论
电源电流直接控制
负载电流检测
active power filter
power quality
instantaneous reactive power theory
direct control of supply current
loadcurrent detection