改进型谐波检测方法在充电站并网中的应用  

Application of the Improved Harmonic Detection Method in the Connection Power Grid of Charging Station

作　　者：彭咏龙[1] 张坤锋 李亚斌[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《电力电容器与无功补偿》2018年第1期112-116,共5页Power Capacitor & Reactive Power Compensation

摘　　要：随着充电站的快速发展,其带来的电能质量问题越来越受到重视。由于充电站自身的特点,其产生的谐波电流随着时间的变化而逐渐发生变化。传统的基于i_p-i_q算法的谐波电流检测方法由于受到低通滤波器的影响,检测速度和启动速度都较慢,不能满足充电站谐波抑制的要求。本文在分析基于6脉冲整流的充电机模型的基础上,建立了基于6台6脉冲整流的充电机的充电站模型。提出了一种基于变步长LMS/LMF算法的自适应滤波器的谐波电流检测算法,并对其理论进行了详细的分析。仿真结果表明,与传统谐波检测算法相比,提出的改进型谐波检测算法跟踪速度和启动速度有明显的提高,达到了预期的效果。With the rapid development of charging station,more and more attention has been paid to its power quality problems. Due to the characteristics of the charging station itself,the harmonic current generated by it changes gradually with the time variation. The detection speed and the starting speed of the traditional harmonic detection method based on i_p-i_q algorithm are low due to the influence of low flux filter and cannot meet the requirement of the harmonic control of the charging station. In this paper,the charging station model based on 6 sets of 6 pulse rectified chargers is set up on the basis of analyzing the 6 pulse rectified charger model. A kind of harmonic current detection algorithm of adaptive filter based on variable step size LMS/LMF algorithm is proposed and its theory is analyzed in detail. It is shown by the simulation result that,compared to the traditional harmonic detection algorithm,the improved harmonic detection algorithm proposed has improved significantly the tracking speed and startup speed and reaches the expected results.

关 键 词：充电站 谐波检测 自适应滤波器 ip-iq算法 

分 类 号：TM935[电气工程—电力电子与电力传动]