摘要
大坝发电厂 1号发变组差动保护 ,在 2号主变反送电空投时往往引起误动作。为此 ,作了 2号主变反送空投试验 ,试验发现 :空投 2号主变时 ,在 1号主变中产生和应涌流 ,分析研究了和应涌流对变压器差动保护的影响 ,得出了和应涌流是变压器差动保护误动的原因之一的结论。并提出了变压器差动保护防止和应涌流误动的技术措施。
For the differential protection for #1 generator-transformer set in Daba power plant, it has maloperations several times as #2 main transformer operating without load during power inverse transmission. Therefore, a test on #2 main transformer in such conditions is done and it is found that when the #2 main transformer operating without load, a surge current is produced in #1main transformer. After analyzing the effect of the surge current on the differential protection for transformer, it shows that the surge current is something to bring the maloperation of the differential protection for transformer. Thus the solutions to above problems are proposed.
出处
《继电器》
CSCD
北大核心
2001年第7期52-54,共3页
Relay
