有源电力滤波器(active power filter,APF)的谐波电流控制直接影响着APF的滤波效果.针对指数趋近率容易产生抖振的问题,提出了一种变指数趋近率,并在dq坐标系下推导出了基于该变指数趋近率的APF滑模控制律.为提高APF对高次谐波的追踪能力,将重复控制和基于变指数趋近率的滑模控制并联,提出了一种APF的重复滑模控方法.仿真结果表明,相对于基于指数趋近率的滑模控制方法,提出的重复滑模控制方法具有更高的稳态精度,电网电流的谐波畸变率更低.
Repetitive Sliding Mode Control Method of Three-phase Active Power Filter
The harmonic current control of active power filter(APF)directly affects the filtering effect of APF.A variable exponential reaching law is proposed to address the issue of chattering caused by exponential reaching law,and an APF sliding mode control method based on this variable exponential reaching law is derived in the dq coordinate system.In order to improve the tracking ability of this method to higher harmonics,a repetitive sliding mode control method of APF is proposed by paralleling repetitive control with sliding mode control based on variable exponential reaching law.The simulation results show that compared to the sliding mode control method based on exponential reaching law,the proposed repetitive sliding mode control method has higher steady-state accuracy and lower harmon-ic distortion rate of the power grid current.
three-phase active power filterharmonic current controlsliding mode controlrepetitive control
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维普
