220 kV电网采用“T”接方式的安全性评估.pdfVIP

跚跚iR计 圃圈圈跚跚.-腿If.圆圆圆 电网设计 220kV电网采用寸接方式的安全性制自 220kV 电网采用 T 接方式的安全性评估 徐逸清，徐磊，马世峰 (华东电力设计院，上海 200063) 摘要:本文调研了 T 接方式在国内外电网中的应用情况，分析了 T 接接线的优缺点，结合我国相关规 程规范，提也 220kV 新电源站和终将变电站较为适合采用 T 接方式接入电网。给令 性，分析了 Tγ 接线E路各对常见 220kV 线z路奋保护的影响，并提出了 220 kV 电网采用 T 接方式的通信配置 方案。设想了 220kV 电源和变电站单 T、双 T 及新能源多 T 等三类接线方式，提出了粮荐的保护方案， 并分析了各接线方式的在不同运行方式下的安全性，并给出了拉荐的接线方式。 关键词 :T接:安全性:继电保护:尤纤通道。 中图分类号: TM77 文献标志码 :B 文章编号: 1671-9913(2015)S2-0634二06 Safety Evaluation ofUsing T Connection Pattem in 220 kV Power Grid XYU Yi-qing, XYU Lei, MA Shi-feng (East China Elec位ic Power Design Institute, Shanghai 200063 , China) Abstract: Applications of teed connection in domestic and fore昭1 power system are investigated, and the advantages and disadvantages of teed connection is analyzed. Referring to relevant national standards and codes, scenarios suitable for 220 kV power plants and substations using Teed connection are proposed. Based on the fault characteristic ofTeed lines, the teed lines impact on common protections of 220kV line are analyzed, and communication configuration of teed lines are proposed. Several schemes of 220 kV power plants and substations using teed connection and recommended pro,tection schemes are proposed. Satefy evaluation for each scheme is carried out under di侄erent operating modes , and recommended schems is given . Key words: teed ∞nnection; safety; relay protection; fibre channel. T 接线路是在一条输电线上支接出另一条 究，为电网的建设和运行提供参考。 输电线，并且在支接点处不设置断路器。由于 1 T攘