1000 MW发电机组接入220 kV电网相关问题研究
Integration of 1 000 MW Coal-fired Generation Unit to 220kV Grid
王海潜 1王旭 2祁万春 1吴晨 1高斌3
作者信息
- 1. 国网江苏省电力公司电力经济技术研究院,南京210008
- 2. 国网江苏省电力公司,南京210024
- 3. 中国电力工程顾问集团华东电力设计院,上海200063
- 折叠
摘要
江苏电网中1 000 MW机组均接入500 kV电网,这使得500 kV电网短路水平不断提高.随着电厂“上大压小”政策的推行,1 000 MW发电机组数量不断增多,500 kV主变降压容量的需求也逐渐增大,这一方面增加了500 kV主变的投资,另一方面电力二次变压的损耗也随之增加.目前江苏部分220 kV电网分区负荷规模大、网架坚强,已初步具备1 000 MW机组接入的条件.从电力系统角度对江苏电网1 000 MW机组接入220 kV电网的积极作用、存在问题、接入条件和方式进行了研究.
Abstract
1 000MW coal-fired generation units are commonly integrated to 500kV grid in Jiangsu Province; the shortcircuit current in 500kV grid is accordingly increased.Under the pressure of the environment,small capacity generation units will be replaced by those with large capacity and more effective energy utilization.Along with this replacement the 500kV transformer capacity gradually aggrandizes,and both transformer investment and power loss are boosted.Nowadays,some partitions of the 220kV Jiangsu grid are strong enough to accept the integration of 1000MW coal-fired unit.In this paper the positive impacts and proposed access methods of 1000MW coal-fired unit to 220kV grid are studied.The results show that,the integration of 1000 MW coal-fired unit to 220kV grid can not only avoid the redundant construction of 500 kV transformers,but also effectively reduce short-circuit currents of 220kV grid.
关键词
发电机组/220/kV电网/变电容量/短路电流Key words
coal-fired generation unit/220kV grid/transformer capacity/short circuit current引用本文复制引用
出版年
2014
NETL
NSTL
万方数据