摘要
对PT二次回路检查试验方法的研究,分析了国内PT投运前及改造后二次回路的验收情况并通过实例介绍了目前PT回路在投运前存在检查不系统造成设备损坏的弊端。该试验方法的提出是通过对PT原理及PT二次回路接线的详细计算分析。计算在系统发生单相接地故障情况下,不同接线方式的PT,二次电压值、开口三角电压值以及四PT的零序电压值,根据计算出的理想数据掌握规律得出此试验方法。
The research of PT secondary loop test method,analyzed the acceptance situation of the PT secondary loop put into operation before and after modification, and through example introduces the PT circuits exist risk because of the not system inspection before put into operation to make equipment damaged.This test method is put forward based on the principle of PT and PT secondary loop connection detailed calculation analysis.Under the system of single-phase grounding fault happens, PT of different connection mode, calculate the secondary voltage value、 open delta voltage value and the zero sequence voltage value of 4 PT, according to the calculated ideal data to master regular so reach this test method.
出处
《电力学报》
2014年第6期526-531,共6页
Journal of Electric Power
关键词
继电保护
PT
二次回路
检查方法
研究
relay protection
PT
secondary loop
test method
research
