摘要
为了减小有源电力滤波器(APF)的开关应力和损耗,便于实现用低耐压开关器件提高APF功率等级,提出了一种基于30°～390°区间矢量模式单周控制三相三线制三电平APF。APF主电路采用二极管钳位型三电平拓扑结构,控制策略采用矢量模式单周控制。推导建立了所提出的APF数学模型和控制目标方程,详细分析了系统稳定性和PI调节器设计,并比较了30°～390°区间和0°～360°区间矢量模式单周控制的区别和联系。最后对APF工作于三相电源平衡和不平衡时的情况分别进行了仿真和实验研究,研究结果表明所提出的APF能有效地补偿系统谐波和无功电流,补偿性能好,验证了所提出的控制方法的可行性和有效性。
In order to reduce the switching stress and loss of APF, and to enhance the APF power rating for lower pressure switch devices, this paper presents a three-phase three-wire three-level APF based on vector mode one-cycle control during 30^o-390^o. The main circuit of APF is based on diode-clamp three-level topology. The vector mode one-cycle control strategy is employed. The mathematic model and control object equation of the proposed APF are established, and system stability and design of PI regulator are investigated in detail. In addition, the difference and relation of the vector mode one-cycle control between30^o-390^o. and 30^o-360^o. are compared. Finally simulation and experiments are implemented for the proposed APF to operate under balanced and unbalanced conditions of three-phase power supply. Simulation and experimental results show that the proposed APF can compensate the harmonics and reactive currents commendably and effectively, and verify the feasibility and validity of the proposed control strategy.
出处
《电力系统自动化》
EI
CSCD
北大核心
2007年第21期76-81,共6页
Automation of Electric Power Systems
关键词
三电平
三相三线制
有源电力滤波器
矢量模式
单周控制
three-level
three-phase three-wire
active power filter （APF）
vector mode
one-cycle control
