电网技术2017，Vol.41Issue(12)：4045-4053,9.DOI:10.13335/j.1000-3673.pst.2017.0832
可消除过渡电阻影响的单相接地距离保护研究
Research on Single Phase Grounding Distance Protection Against Transition Resistance
摘要
Abstract
In view of steady-state overreach and miss operation of conventional distance protection caused by transition resistance, a new single phase grounding distance protection scheme immune to transition resistance was presented and its feasibility was analyzed. Firstly, based on geometrical property of vectors of voltage and current of protective relay and fault point, similar triangles were established. On this basis, equation of fault distance was formulated to eliminate effect of transition resistance. Then using phase relationship between negative sequence current measured by distance relay and voltage at fault point, above equation of fault distance was simplified, beneficial to its quick solution. The new distance protection scheme can locate fault point with single end electric quantities and effectively solve mal-operation or miss operation problems caused by transition resistance. Validity of the new scheme was confirmed with simulations on PSCAD/EMTDC.关键词
距离保护/过渡电阻/电压相量/电流相量/稳态超越Key words
distance protection/transition resistance/vector of voltage/vector of current/steady-state overreach分类
信息技术与安全科学引用本文复制引用
郑涛,王可坛,刘校销,祁欢欢..可消除过渡电阻影响的单相接地距离保护研究[J].电网技术,2017,41(12):4045-4053,9.基金项目
国家高技术研究发展计划(863 计划)(2012AA050401) （863 计划）
国家电网公司科技项目(SGRI-DL-71-12-005).Project Supported by the National High Technology Research and Development (863 Program) (2012AA050401) （SGRI-DL-71-12-005）
Project Supported by Project of State Grid Corporation of China(SGRI-DL-71-12-005). （SGRI-DL-71-12-005）
