一种适用于城市中心区的110kV电网结构

针对城市中心区土地价格越来越昂贵,变电站和线路走廊用地选择越来越困难的实际问题,为满足城市中心区电力负荷增长及高可靠性的需求,同时保证工程实施的可行性和经济性,提出一种适用于城市中心区的110kV电网结构——链式、辐射混合结构。该110kV电网结构以坚强的上级电网和中压配电网为基础,合理划分供电区域,在同—供电区域中各变电站间加强中压联络,在某一台主变或某一条线路检修或停运时,可以完全通过中压网络将负荷转移,从而在不降低供电可靠性的前提下,可以采用单主变、单进线变电站;减少城市中心区地下变电站、半地下变电站的使用,节约投资。

110 kV Power Grid Structure for Urban Centers

For the increasingly expensive land prices in urban centers,the site-selection and construction of substations and lines become increasingly difficult.In order to meet the load growth and high reliability requirements in urban centers,while ensuring the implementation of the project＇s feasibility and economy,a 110 kV power grid structure is proposed for urban centers,named chain and radiation hybrid structure.Based on strong upper grid and medium voltage distribution network,this power grid divides the substations in to different supply regions,and strengthen the contacts of medium voltage grid in the same region.If a transformer or someone line maintenance or outage,the load can completely through the medium voltage network transfer to another substation.Thus without reducing the reliability,the single transformer,and single line substations can be used in urban centers;reducing the using of underground substations and semi-underground substations,saving investment.