间谐波对电力变压器的影响分析  

Effect of Interharmonic on the Power Transformer

作　　者：刘壮志[1,2] 牛东晓[1] 季宇[2] 吴鸣[2] 李洋[2] 

机构地区：[1]华北电力大学,北京102206 [2]中国电力科学研究院,北京100192

出　　处：《华东电力》2013年第3期655-660,共6页East China Electric Power

摘　　要：间谐波是频率非基波整数倍的噪声信号,可对电力系统造成诸多危害。研究了间谐波信号对电力变压器的影响,详细分析了间谐波环境下变压器励磁电流陡增产生机理。为精确仿真该影响过程,文中基于Jiles-Atherton模型搭建变压器计算模型,并结合Simulink软件建立了考虑磁滞效应的非线性变压器仿真模型。最后,通过实验分别分析了间谐波初相、幅值、频率对变压器励磁电流及铁磁损耗的影响,其结果证明了分析的正确性。Interharmonic is a kind of frequency disturbance, which can make various adverse impact on the power sys- tem with its characteristic of non-integer of the fundamental frequency. In this paper, the influence on the power transformer exerted by interharmonic is analysed in detail. The reason for the growth of the exciting current is ex- plained, furthermore to simulink the effect process exactly, the model of transformers based on Jiles-Atherton theory is built with the software Simulink. The simulation also exposed the relation of the magnetizing current and the iron loss with the oarameters of the interharmonic and the results have verified the correct of the analysis.

关 键 词：间谐波 电力变压器 励磁电流 Jiles—Atherton模型 铁磁损耗 

分 类 号：TM71[电气工程—电力系统及自动化]