Y/Δ接线变压器环流的计算  

Calculation of Circulation for the Y/Δ Transformer

作　　者：金恩淑[1] 刘丽丽[1] 杨明芳[1] 陈韬[1] 

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012

出　　处：《东北电力大学学报》2007年第4期22-25,共4页Journal of Northeast Electric Power University

摘　　要：对于 Y/Δ接线的变压器保护都要受到环流的影响,但目前尚无准确的环流求取方法,通常采用星变角或角变星的方法来躲避环流的影响,但这些方法都会给保护带来一定的误差,影响保护的正确动作。为此,提出了一种新的算法,能够准确计算出 Y/Δ接线变压器的环流,通过 EMTP 仿真及 MAT-LAB 编程发现该算法在各种情况下均能准确的计算出变压器的环流,能够提高变压器保护的正确动作率。All the Y/△ transformer protections are influenced by circulation. At present, there are no very accurate methods on the calculation of circulation. The star-delta transformation or angle-delta transformation is widely used to avoid the impact of circulation. But all the methods will bring about a certain error and influence the correct action of the protection. Therefore, a new method is proposed in this paper. It can accurately compute circulation of the Y/△ transformer. By EMTP simulation and MATLAB programming, it is found that circulation of the transformer can be accurately got in all cases though this method. It also can improve the rate of correct action of the Y/△ transformer protection.

关 键 词：Y/△接线变压器 环流 变压器保护 励磁涌流 

分 类 号：TM77[电气工程—电力系统及自动化]