摘要
为提高电力变压器谐波抑制效果,提出一种基于稳健回归的谐波抑制方法。方法通过采用自适应改进的最小均方算法(Least Mean Square,LMS)作为电力变压器谐波电流检测算法,并基于有源电力滤波器(Active Power Filter,APF)对改进LMS算法检测的谐波电流进行跟踪补偿,实现了电力变压器谐波的有效抑制。仿真结果表明,所提改进LMS算法可快速、精确检测到电力变压器中的谐波电流,相较于改进前LMS算法,检测时间缩短了0.09 s,总谐波失真减少了2.33%,分别达到0.14 s和1.12%;在电力变压器中投入使用LMS算法的APF进行谐波抑制后,电力变压器的4次、8次、12次谐波电流谐波电流均下降到国家标准范围内,提高了电力变压器的运行稳定性。
In order to improve the harmonic suppression effect of power transformer,a harmonic suppression meth⁃od based on robust regression is proposed.The adaptive improved least mean square(LMS)algorithm is used as the harmonic current detection algorithm of power transformer,and the harmonic current detected by the improved LMS algorithm is tracked and compensated based on the active power filter(APF),so as to realize the effective sup⁃pression of power transformer harmonics.The simulation results show that the proposed improved LMS algorithm can quickly and accurately detect the harmonic current in the power transformer.Compared with the improved LMS algorithm,the detection time is shortened by 0.09 s,and the total harmonic distortion is reduced by 2.33%,reaching 0.14 s and 1.12%,respectively.After the APF with LMS algorithm is put into the power transformer for harmonic suppression,the harmonic current of the 4 th,8 th and 12 th harmonic current of the power transformer is reduced to the national standard range,which improves the operation stability of the power transformer.
作者
何锋
刘俊
赵艳龙
杨一峰
鲁济星
HE Feng;LIU Jun;ZHAO Yanlong;YANG Yifeng;LU Jixing(State Grid Anji County Power Supply Company,Anji 313300,Zhejiang China)
出处
《粘接》
2025年第8期151-154,共4页
Adhesion
关键词
APF
谐波检测
谐波抑制
电力变压器
LMS算法
APF
harmonic detection
harmonic suppression
power transformer
LMS algorithm
