摘要
提出一种基于单周控制的三相4桥臂有源电力滤波器(APF)。该方法只需检测三相电网电流、中线电流和APF直流侧电容电压,不需要乘法器,省去了谐波和无功电流的计算。整个控制器只需一个带复位的积分器、4个比较器、4个触发器和一些线性元件组成,控制器结构简单,并且具有较强的鲁棒性和较高的可靠性。单周控制为非线性定频控制方法,因此其控制精度高,补偿效果好,易于工业应用。在对三相4桥臂有源滤波器分析、建模的基础上采用Saber仿真软件进行了仿真研究。仿真结果表明基于单周控制的三相4桥臂有源电力滤波器能够对系统谐波、无功和零序电流进行有效的补偿,且响应快。
A three-phase four-legs active power filter based on one-cycle control was proposed. The proposed control method only needs to detect the three-phase electrical power＇s current, neutral current, and DC side capacitance voltage of APF. It eliminates the multipliers, the calculating of harmonics and the reactive current. The proposed controller only needs one integrator with reset, four comparators, four flip-flops and some linear components. The controller is simple, robust, and reliable. The one-cycle belongs to nonlinear and unified constant-frequency control method, so it has features of high precision, effective compensation, and desirable for industrial applications. The analysis, modeling and simulations with Saber were carried out with the three-phase four-legs active power filter. The simulation results verify that the proposed three-phase four-legs active power filter can dynamically and effectually compensate the harmonics, reactive and zero sequence current.
出处
《电气传动》
北大核心
2007年第9期25-28,共4页
Electric Drive
关键词
有源滤波器
单周控制
4桥臂
active power filter one-cycle control four-legs
