低压配电网三次谐波电流的检测与分析  

Detection and Analysis of Three Harmonic Current of Low Voltage Distribution Network

作　　者：王业铨[1] 刘建东[2] 张啸[1] 商凯[1] 

机构地区：[1]北京化工大学信息科学与技术学院,北京100029 [2]北京石油化工学院信息工程学院,北京102617

出　　处：《北京石油化工学院学报》2015年第3期54-57,共4页Journal of Beijing Institute of Petrochemical Technology

摘　　要：随着低压配电网非线性负荷的增加,各相线非线性负荷产生的三次谐波电流在中线中叠加,使得中性线中电流大幅提升,从而影响了整个供电系统的电能质量和安全。通过对石家庄某居民小区进行实际检测,分析三次谐波电流对电网电能质量的影响,并对串联型三次谐波滤波器对已击穿设备的影响进行分析。得出三次谐波电流主要影响电流畸变和低压配电网的畸变功率。With the increment of nonlinear load in low-voltage distribution grid, the third harmonic current produced in every phase is added in neutral, so the current in neutral is raised greatly. The power quality and safety of the whole distribution system are affected. Through the actual detection of a Shijiazhuang residential area, the influence of the three harmonic current on power quality is analyzed. By examining the influence of series three harmonic filter on the breakdown equipment, the conclusion is reached that the three harmonic current mainly affects the current distortion and the distortion power of low voltage distribution network.

关 键 词：三次谐波电流 谐波检测 谐波治理 中线谐波滤波器 

分 类 号：TM711[电气工程—电力系统及自动化]