110 kV T接线路保护技术研究及工程应用探讨

Technological Research and Engineering Application in 110 kV Teed Lines Protection

近年来T接线路得到了大量的应用,传统的双端差动保护无法适用于T接线路,因而各制造厂家均开发了适用于T接线路的保护装置。首先介绍国网、南网标准化方式下的T接线路保护配置方式及相关技术要求,然后针对光纤通道的连接方式、运行方式转换进行讨论,之后提出了T接线方式下的光纤通道冗余差动保护设计方案,最后对T接线路的故障测距、距离保护整定原则、特殊故障下的差动保护和距离保护的适应性展开讨论。

Teed lines have found wide application in recent years.The traditional double-ended differential protection is inapplicable to Teed lines.Therefore,many manufacturers have developed protection devices suitable for Teed lines.First configuration mode and related technological requirements of Teed lines protection under standard mode of State Grid and South Grid are introduced,and second,Fibre Channel connection mode and operation mode conversion are discussed.Then fibre channel redundant differential protection design scheme under the T connection pattern is proposed.Finally Teed lines fault location,distance protection setting principles,differential protection under special faults,and adaptability of distance protection are discussed in detail.