河南110 kV网架结构及变电站主接线的典型模式分析

Analysis of Henan 110 kV Grid Structure and Typical Mode of Substation Main Wiring

为更好地满足社会发展和未来社会对电网需求,有必要利用现有基础,有针对性地对河南省供电网进行升级改造。回顾了河南地区110 kV网架结构及变电站主接线的历史演变,结合国内外部分城市的网架110 kV电网的发展经验,从可靠性、灵活性、经济性等三个方面对当前不同网架结构及接线模式进行了对比研究,城市110 kV电网采用链式π接和链式Tπ混合两种网架结构均可满足供电可靠性要求,链式π接结构的调度、运维操作较为灵活,链式Tπ混合结构的经济性较好。以郑州市110 kV电网为实例对链式π接和链式Tπ混合两种网架结构进行了设计的对比分析。研究结果可为相关城市电网及变电站主接线规划设计提供参考。

In order to better meet the needs of development and future society for power grid,the existing basis is used to upgrade the power supply network of Henan Province.The historical evolution of 110 kV grid struc⁃ture and main connection of substation in Henan Province is reviewed.Combined with the development experi⁃ence of 110 kV grid structure in some cities in China and abroad,the current different grid structures and connec⁃tion modes are compared from three aspects of reliability,flexibility and economy.The urban 110 kV power grid adopts chainπconnection and chain Tπtwo grid structures,which can meet the requirements of power sup⁃ply reliability.The chainπconnection structure is more flexible in scheduling and operation and maintenance,and the chain Tπhybrid structure has better economy.The research results can provide theoretical reference for the planning and design of main wiring of power grid and substation.