电力系统保护与控制Issue(9)：89-94,6.
750 kV变压器保护配置及整定计算探讨
Discussion on protection configuration and setting calculation for 750 kV transformer
张健康 1粟小华 1夏芸2
作者信息
- 1. 国家电网西北电力调控分中心，陕西 西安 710048
- 2. 北京中恒博瑞数字电力科技有限公司 北京 100096
- 折叠
摘要
Abstract
750 kV grid as the main grid of Northwest China is now in rapid development period. On the basis of the characteristics of 750 kV transformer, the protection configuration and its related problems are analyzed. Considering that the differential protection of 750 kV transformer is quite perfect, the internal fault is mainly dependent on the differential protection to remove and the backup protection is primarily responsible for external faults at the bus and the local end of the adjacent lines. To meet the requirements for sensitivity and speed at external local faults without losing selectivity is the key issue for setting calculation in transformer backup protection. Based on the above analysis, the setting calculation method for 750 kV transformer protection is proposed and the applicability of impedance protection, improvement of differential protection, simplification of backup protection and automatic setting calculation of transformer protection are discussed as well. The scheme has been successfully applied to the 750 kV transformer protection in Northwest China.关键词
750 kV变压器/差动保护/后备保护/阻抗保护/整定计算Key words
750 kV transformer/differential protection/backup protection/impedance protection/setting calculation分类
信息技术与安全科学引用本文复制引用
张健康,粟小华,夏芸..750 kV变压器保护配置及整定计算探讨[J].电力系统保护与控制,2015,(9):89-94,6.
