1000kV GIL设备在特高压南阳站扩建工程中的应用

Application of 1000kV GIL Equipment in the Extension Project of UHV Nanyang Power Substation

介绍了南阳站气体绝缘输电线路(GIL)工程总体布置方案,给出了工程关键组部件的标准化单元设计,研究了3套不同原理的故障定位系统优缺点。分析了GIL故障时为可靠闭锁对站重合闸,差动保护采用专用远传信号传输装置及通道的方案。基于就近的自平衡伸缩节或铰链伸缩节作为拆解故障单元的起始位置,阐述了不同类型母线气室故障检修方案及设备投运以来柔性设计部件存在的问题,为后续1000kV GIL工程的设备制造、工程设计、运维检修等提供借鉴。

This paper introduced a general layout scheme of the gas-insulated transmission line (GIL) project of Nanyang station.It proposed the standardized unit design of the vital components of the project and studied the advantages and disadvantages of three sets of fault location systems with different principles.In addition,this research analyzed the plan which could shut down the reclosing of the opposite substation when the GIL fails,and the differential protection device employed the scheme of a special remote signal transmission device and channel.This paper elaborated on different maintenance plans for the bus air chamber fault and the existing problems of the flexible design part based on the starting point of dismantling the faulty unit,which is the nearest automatic balancing expansion joint or expansion hinge.It provides a reference for the follow-up 1 000 kV GIL projects from various aspects,such as machinery manufacturing,engineering design,operation,and maintenance,etc.