摘要
单相有源电力滤波器输出谐波补偿电流时,存在直流电压波动大、直流支撑电容器纹波电流大的特点,影响了电容器以及滤波器的使用寿命。本文根据有源滤波器的等值电路和交直流侧电压电流变换原理,建立了直流电压波动分量和电容器纹波电流与谐波补偿电流之间的解析关系式,揭示了滤波器补偿电流对直流电压波动和纹波电流的影响规律,仿真和实验结果验证了理论分析的正确性,最后给出了直流支撑电容器的选择建议。
Such features as large DC voltage fluctuation and large ripple current of the support capacitor is existed when the harmonic compensation current is output by the single phase active power filter and the operation life of the capacitor and filter is affected. In this paper,the analytic relation between ripple component of DC voltage, ripple current and harmonic compensation current of capacitor is established in accordance with the equivalent circuit of filter and voltage and current transformation principle at the AC and DC side,the rule on the influence of filter＇s compensation current on DC voltage fluctuation and ripple current is revealed. The correctness of theoretical analysis is verified by the simulation and test result and finally the selection suggestion on the DC support capacitor is given.
出处
《电力电容器与无功补偿》
北大核心
2016年第6期24-28,39,共6页
Power Capacitor & Reactive Power Compensation
基金
国家自然科学基金项目(51507139
51677151)
