摘要
有源电力滤波器(APF)采用脉宽调制技术会产生高频开关谐波电流注入电网,必须采用输出滤波器加以滤除。鉴于LCL滤波器在电网阻抗摄动时的优良滤波性能,将其应用于APF中,基于此建立了LCL型输出滤波器在APF中的数学模型。针对阻尼电阻引起损耗的问题,采用在APF控制策略中引入电容电流反馈的LCL滤波器有源阻尼方法,等效地增加了阻尼作用,可有效抑制谐振。实验结果证明了该有源阻尼方法的有效性。在上述研究基础上,综合考虑LCL输出滤波器的滤波性能和APF补偿性能等问题,建立了LCL滤波器的优化模型,并采用遗传算法对其寻优。优化后的输出滤波器不但能有效地滤除开关谐波,而且增强了APF的补偿能力。
The active power filter（APF） utilizing the pulse width modulation（PWM） technology generates high frequency switch harmonic current,which is leaked into the power grid and must be eliminated by output filter.Because of the excellent filtering performance of LCL while grid impedance fluctuating,the LCL filter is adopted as output filter in APF.Thus,the mathematical model of LCL type output filter in APF is constructed.For consuming problem caused by damping resistance,a LCL filter active damping method based on introducing capacitor current feedback is presented,which can enhance the damping equivalently and avoid current resonance.Simulation and experimental results justify the active damping method.On the basis of above research,synthetically considering the compensation performance of APF and filtering performance of LCL output filter etc,the optimization model of LCL filter and optimization method based on genetic algorithm are presented.Optimized LCL filter can not only eliminate switch harmonic effectively but also enhance the compensation ability of the APF.
出处
《电工技术学报》
EI
CSCD
北大核心
2011年第5期159-164,177,共7页
Transactions of China Electrotechnical Society
基金
黑龙江省博士后资助项目(LBH-Z08190)
中央高校基本科研业务费专项资金资助项目(HIT.NSRIF.2010102)
