广东电力2017，Vol.30Issue(4)：21-24,36,5.DOI:10.3969/j.issn.1007-290X.2017.04.004
电网波动对主变压器过激磁保护影响分析及其 整定策略
Analysis on Affect of Power Grid Fluctuation on Main Transformer Over-excitation Protection and Setting Strategy
邱建 1丁晓兵 1陈朝晖 1梅勇 1李捷 1李正红1
作者信息
- 1. 中国南方电网电力调度控制中心,广东 广州510623
- 折叠
摘要
Abstract
In allusion to two cases of abnormal over-excitation protection of the main transformer of CSG in recent years, this paper analyzes and summarizes reasons by combining with basic principle of over-excitation protection.According to situation of power grid fluctuation after asynchronous networking with Yunnan power grid, it discovers sustained time is in second level when over-excitation times are more than 1.05 in the case of large disturbance, and the maximum over-excitation times under the normal operation condition can reach to 1.05.Furthermore, it also analyzes influence of power grid fluctuation on over-excitation protection of the main transformer, reveals setting risks in over-excitation protection and proposes corresponding setting strategy.It suggests to set the lower limit of setting value of over-excitation protection to be more than 1.08.关键词
过激磁/异步联网/电网波动/定值下限/整定策略Key words
over-excitation/asynchronous networking/power grid fluctuation/lower limit of setting value/setting strategy分类
信息技术与安全科学引用本文复制引用
邱建,丁晓兵,陈朝晖,梅勇,李捷,李正红..电网波动对主变压器过激磁保护影响分析及其 整定策略[J].广东电力,2017,30(4):21-24,36,5.
