煤矿35 kV变电站差动保护及其预防误动研究

Study on Differential Protection of 35kV Substation in Coal Mine and Its Misoperation Prevention

分析了煤矿35 kV变电站主变压器差动保护原理,介绍了THT-203型变压器差动保护装置的功能,在分析差动保护误动作原因的基础上,总结了工作中预防差动保护误动作的管理措施,包括严格制定差动保护制动方案、加强变压器验收管理、加强差动保护定值管理和严格且规范执行变压器负荷测试等。

The principle of differential protection of main transformer in 35kV substation of coal mine is analyzed.The function of THT-203 transformer differential protection device is introduced.Based on the analysis of the causes of differential protection misoperation,the management measures to prevent misoperation of differential protection in the work are summarized,including strict formulation of differential protection braking plan,strengthening of transformer acceptance management,strengthening of differential protection fixed value management,and strict and standardized implementation of transformer load testing.