电力系统保护与控制Issue(24)：110-115,6.
交流特高压变电站站用变保护技术方案
Protection of station transformer of UHV AC substation station technology solutions
宋小会 1杨建翔 2郭志忠 1樊占峰3
作者信息
- 1. 哈尔滨工业大学电气工程及自动化学院，黑龙江 哈尔滨 150001
- 2. 西安科技大学电气与控制工程学院，陕西 西安 710054
- 3. 许继集团，河南 许昌 461000
- 折叠
摘要
Abstract
UHV AC substation auxiliary power system usually adopts two-stage step-down approach, and level 2 series transformer differential protection needs to be led by the CT of 110 kV and 380 V side current. When low voltage side failure occurs, the low voltage side current dozens thousand amperes, converting it to the high side, it is only a few hundred amperes. Because of the large difference on both sides of the current data, it brings some problems on CT model selection and configuration, principle, and setting of station transformer protection. Through the study of the configuration and connection mode of low voltage side of 1000 kV UHV Huainan substation equipment, combined with the actual engineering conditions and equipment parameters, this paper analyzes the UHV AC substation station with transformer protection special problems, puts forward the technology solution that a set of protection device is configured in the double set of current conversion module and two sets of differential protection and backup protection, and establishes a dynamic model system to verify the feasibility of this principle scheme.关键词
特高压/站用变保护/差动保护/后备保护/双CT接入Key words
UHV/station transformer protection/differential protection/backup protection/double CT access分类
信息技术与安全科学引用本文复制引用
宋小会,杨建翔,郭志忠,樊占峰..交流特高压变电站站用变保护技术方案[J].电力系统保护与控制,2014,(24):110-115,6.
