关于PT二次单相接地对变压器过激励保护影响及对策分析  

Countermeasures analysis and over-excitation impact for transformers about PT second single-phase grounding

作　　者：刘志远[1] 李玉芳[1] 

机构地区：[1]宁夏电力调度中心,宁夏银川750001

出　　处：《电力系统保护与控制》2008年第23期84-87,91,共5页Power System Protection and Control

摘　　要：就运行中发生的一起PT二次单相接地故障,引起变压器过激磁保护误动事故案例,通过现场模拟PT二次回路单相接地试验,验证其对变压器过激磁保护装置的影响,并对此进行分析,提出相应的解决对策。According to a case of PT second single-phase grounding fault which caused the transformer over-excitation protection false tripping in running, this paper verifies the impact of the PT second single-phase grounding on over-excitation protection for the transformer by a spot simulation experiment and analyzes it to present corresponding solutions.

关 键 词：单相接地 过激磁 额定电压 

分 类 号：TM772[电气工程—电力系统及自动化]