利用三相交流低频电源检测主变差动保护回路的接线校核  

Wiring Check of Detecting Differential Protection Circuit of Main Transformer with Three-phase AC Low Frequency Power Supply

作　　者：梁皓钦 赵金宪 LIANG Haoqin;ZHAO Jinxian(School of Electric and Control,Heilongjiang University of Science and Technology,Haerbin 150022,China)

机构地区：[1]黑龙江科技大学电气与控制工程学院

出　　处：《电工技术》2019年第22期47-49,共3页Electric Engineering

摘　　要：差动保护是变压器内部故障保护的主要手段,通过差流平衡调整和引入比率动作特性曲线,使得差动保护具有判断准确、动作可靠的特点。为确保差动保护配置的准确投入,文章提出了采用三相低频交流电源模拟实际工况校验二次回路接线方式的试验方法,从而为主变差动保护的工程应用提供了简易有效的检查方法。Differential protection is the main means of transformer internal fault protection.By adjusting the differential current balance and introducing the ratio action characteristic curve,the differential protection has the characteristics of accurate judgment and reliable operation.In order to ensure the accurate input of differential protection configuration,a test method for verifying the connection mode of secondary circuit by using three-phase low-frequency AC power supply to simulate actual working conditions was introduced.A reference for the engineering application of differential protection of main transformer was provided.

关 键 词：低频电源 保护回路 接线校核 

分 类 号：TM7[电气工程—电力系统及自动化]