改进型谐波检测方法在充电站并网中的应用
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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.
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.
引文
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[14]周俊,刘明,邱爱兵.基于瞬时无功功率的谐波实时检测新方法研究[J].电力电容器与无功补偿,2015,36(6):18-22.ZHOU Jun,LIU Ming,QIU Aibing.Study on new harmonicreal-time detection method based on transient reactivepower[J].Power Capacitor&Reactive Power Compensa-tion,2015,36(6):18-22.
[15]刘利平,杨雄平,李昱来,等.计及电动汽车接入的供电可靠性最优分时电价模型[J].广东电力,2017,30(5):56-62.LIU Liping,YANG Xiongping,LI Yulai,et al.TOU pricemodel of reliability optimization considering electric vehi-cles accessing[J].Guangdong Electric Power,2017,30(5):56-62.
[2]徐福金.电动汽车技术新进展探析[J].硅谷,2015(2):3-4.
[3]杜学龙,刘志珍,王建,等.电动汽车充电站谐波抑制方法的对比分析[J].电力系统保护与控制,2012(19):139-143.
[4]梁营玉,刘建政,许杏桃,等.电动汽车充电站谐波治理方案[J].电力电子技术,2015,49(7):44-46.LIANG Yingyu,LIU Jianzheng,XU Xingtao,et al.The scheme of harmonic suppression for electric vehicle charging station[J].Power Electronics,2015,49(7):44-46.
[5]李娜.不同类型充电机组成充电站接入系统的谐波研究[D].北京:北京交通大学,2010.
[6]赵月飞,朱长青,安巧静,等.基于变步长LMS的谐波电流检测方法的研究[J].军械工程学院学报,2014,26(2):48-52.ZHAO Yuefei,ZHU Changqing,AN Qiaojing,et al,Research on the method of harmonic current detection based on variable steplms algorithm J[J].Journal of Ordnance Engineering College,2014,21(2):48-52.
[7]刘献帅,王大志,宋克岭,等.基于变步长LMS的APF谐波电流检测方法[J].电气传动,2016,46(3):39-43.
[8]房国志,杨超,赵洪.基于FFT和小波包变换的电力系统谐波检测方法[J].电力系统保护与控制,2012,40(5):75-79.FANG Guozhi,YANG Chao,ZHAO Hong.Detection of har-monic in power system based on FFT and wavelet packet[J].Power System Protection and Control,2012,40(5):75-79.
[9]苗长新,樊露丹,李洪涛,等.一种新的谐波检测方法及其在APF中的应用[J].电力电容器与无功补偿,2016,37(5):1-6.MIAO Changxin,FAN Ludan,LI Hongtao,et al。A newharmonic detection method and its application in activepower filter[J].Power Capacitor&Reactive Power Com-pensation,2016,37(5):1-6.
[10]雷翼龙.电力系统自适应谐波检测方法研究[D].成都:西南交通大学,2015.
[11]张艳军,杨晟飞,杨祯.一种无谐波检测的中频有源电力滤波器[J].陕西电力,2016,44(12):26-29.ZHANG Yanjun,YANG Shengfei,YANG Zhen.Mediumfrequency active power filter without harmonic detection[J].Shaanxi Electric Power,2016,44(12):26-29.
[12]PENG FZ,OTT G W,ADAMS D J.Harmonic and reac-tive power compensation based on the generalized instan-tane-ous reactive power theory for three-phase four-wiresystems[J].IEEE Transactions on Power Electronics,1997,2(6):1089-1095.
[13]BELAIDI R,HADDOUCHE A,GUENDOUZ H.Fuzzylogic controller based three-phase shunt active power filterfor compensating harmonics and reactive power underunbalanced mains voltages[J].Energy Procedia,2012,18(4):560-570.
[14]周俊,刘明,邱爱兵.基于瞬时无功功率的谐波实时检测新方法研究[J].电力电容器与无功补偿,2015,36(6):18-22.ZHOU Jun,LIU Ming,QIU Aibing.Study on new harmonicreal-time detection method based on transient reactivepower[J].Power Capacitor&Reactive Power Compensa-tion,2015,36(6):18-22.
[15]刘利平,杨雄平,李昱来,等.计及电动汽车接入的供电可靠性最优分时电价模型[J].广东电力,2017,30(5):56-62.LIU Liping,YANG Xiongping,LI Yulai,et al.TOU pricemodel of reliability optimization considering electric vehi-cles accessing[J].Guangdong Electric Power,2017,30(5):56-62.