摘要
为了解决并联有源电力滤波器(APF)控制算法复杂和开关频率高的问题,建立了并联无电压传感器APF数学模型,提出基于虚拟阻抗方法APF控制策略。无电压传感器APF无需复杂的锁相倍频电路,只需检测电流信号即可补偿与控制谐波电流,简化了控制算法。基于虚拟阻抗控制的APF,模拟出需要的电容特性来抵消无功电流分量和谐波分量。仿真及结果验证了基于虚拟阻抗控制无电压传感器APF,在较低开关频率下,仍然具有较好的补偿性能。
In order to solve the problems of shunt active power filter(APF)control algorithm complexity and highswitch frequency,the voltage sensorless mathematical model was established,and APF control strategy based on virtualimpedance was put forward. The voltage sensorless APF without complex frequency multiplication phase-locked circuitdetected current signal to compensate and control harmonic current,so that the control algorithm was simplified. ForAPF based on virtual impedance control strategy,the capacitance was simulated to offset the reactive currentcomponent and harmonic components. The simulation and experiment results verify that the APF control strategy basedon virtual impedance still had a good compensation performance under low switching frequency.
出处
《电气传动》
北大核心
2016年第2期40-44,共5页
Electric Drive
基金
国家自然科学基金重点资助项目(61433004)
国家自然科学基金(51467007)
关键词
有源电力滤波器
虚拟阻抗
无电压传感器
active power filter(APF)
virtual impedance
voltage sensorless
