四川水力发电2025，Vol.44Issue(2)：10-13,4.DOI:10.20196/j.cnki.scslfd.20250203
大中型水轮发电机中性点配电变压器电阻接地方式设计选型
Design and Selection of Resistance Grounding Mode for Neutral Distribution Transformer of Large and Medium-sized Hydroelectric Generators
任良均1
作者信息
- 1. 阿坝水电开发有限公司,四川 阿坝州 623500
- 折叠
摘要
Abstract
This paper analyzes the characteristics of single-phase grounding fault current and fault transient ov-ervoltage of stator winding of large and medium-sized hydroelectric generators,and introduces the working principle of generator neutral grounding through distribution transformer to suppress fault transient overvolt-age.Taking the generator neutral grounding mode of Bala Hydropower Project as an example,it analyzes and calculates the parameters such as grounding resistor resistance values and distribution transformer capacities under the distribution transformer based resistance grounding scheme,designs and selects the grounding resist-ance and distribution transformer,and verifies that the stator single-phase grounding fault currents and transi-ent overvoltage after the generator neutral is grounded through distribution transformer resistance meet the specification requirements,so as to ensure the safe and stable operation of the generator.关键词
发电机中性点/配电变压器/接地方式/暂态过电压Key words
Generator neutral point/Distribution transformer/Grounding mode/Transient overvoltage分类
动力与电气工程引用本文复制引用
任良均..大中型水轮发电机中性点配电变压器电阻接地方式设计选型[J].四川水力发电,2025,44(2):10-13,4.
