变压器励磁涌流及其对差动保护影响的仿真分析  

Simulation and analysis of transformer inrush current and its impact on current differential protection

作　　者：王慧[1] 闫坤[1] 高厚磊[1] 陈学伟[1] 

机构地区：[1]山东大学电气工程学院,山东济南250061

出　　处：《实验技术与管理》2013年第11期9-13,56,共6页Experimental Technology and Management

基　　金：国家自然科学基金项目(51277114)

摘　　要：利用仿真软件PSCAD准确搭建变压器模型,对变压器励磁涌流的产生机制、波形特征和影响因素进行了仿真与分析。结合变压器差动保护,对常用励磁涌流识别方法、防止励磁涌流引起差动保护误动的动作逻辑等进行了分析,并在不同故障条件下对变压器差动保护的典型动作判据进行了仿真验证。结果表明,数字仿真技术能够形象地再现励磁涌流的波形特征,反映变压器的不同故障和励磁涌流对差动保护的影响,可以作为辅助工具用于变压器差动保护的设计开发与教学培训。An accurate transformer model is built by using PSCAD package. The generation mechanism, waveform characteristics and influencing factors of transformer inrush current are simulated and analyzed. Combining the transformer differential protection, this paper discusses the conventional methods to identify inrush current and the operation logic to prevent mis-operation of the protection caused by inrush current. The typical operating criteria of the transformer differential protection are also simulated under different fault conditions. The results show that the digital simulation technique is able to properly generate waveform characteristics of inrush current, different kinds of transformer fault status and the influence of inrush current on differential protection. Therefore, this technique can be used as an aided tool for the development, teaching and training of transformer differential protection.

关 键 词：变压器 励磁涌流 差动保护 数字仿真 实验教学 

分 类 号：TM771[电气工程—电力系统及自动化] TP391.9[自动化与计算机技术—计算机应用技术]