摘要
ＬＣＤ－４型差动继电器用于变压器保护，当其外部电流回路接线不同时，其灵敏度及躲外部故障能力有很大的区别，对保护的动作行为有很大的影响。文章结合黄石电厂三期工程（１× ２００ＭＷ）的具体算例，对该型差动保护外部电流回路接线进行了详细的分析，同时，这一分析方法也可作为同类比率制动型差动保护的参考。
The LCD-4 differential relay is used in transformers protection. Its sensitivity and retiabili-ty for outside fault vary with different external current circuit connections, which greatly affect the protection operation. With the example of phase Ⅲ project of huangshi power plant,this article details the analysis of them and gives the calculating example. Meantime,the analysis method can be as a ref- erence for the same model of proportional differential protection.
出处
《湖北电力》
2002年第2期4-6,共3页
Hubei Electric Power
关键词
差动继电器
LCD-4型
差动保护
电流回路
接线
protectional restraining
differential protection
current circuit connections
