融合卡尔曼谐波补偿的有源电力滤波器

摘要

Aiming at the slow speed and low accuracy of the conventional method for harmonic current detection of power grid based on the active power filter (APF) ,a hybrid Ip-Iq method of Kalman algorithm for detecting the harmonic wave is proposed so that the detection error can be reduced to some extent .The Kalman filter is used to complete the filtering instead of the low pass filter .The hybrid Ip-Iq method of Kalman algorithm is adopted for the harmonic detection ,the simulation model of the active power filter is established ,and the current waveform and THD value are analyzed .The correctness and feasibility of the theory and control strategy are verified ,and the simulation results show that the hybrid Ip-Iq method of Kalman algorithm can get the effective compensation .%针对基于有源电力滤波器(APF)在电网中检测谐波时常规的谐波电流检测方法速度慢、精度不高,提出了一种融合卡尔曼型Ip-Iq法检测谐波,在一定程度上减小了检测误差.采用卡尔曼滤波器代替低通滤波器完成滤波,采用融合卡尔曼型Ip-I q法作为谐波检测的方法,并建立了有源电力滤波器的仿真模型,分析电流的波形和谐波畸变率值,验证了所述理论和控制策略的正确性和可行性,仿真结果表明融合卡尔曼型Ip-Iq法能够对谐波进行有效补偿.