抽水蓄能电站接入系统方案研究

Study on Scheme of Pumped Storage Power Station Connecting to Power Grid

根据易县抽水蓄能电站的地理位置及电网网架结构,提出3种500kV接入系统方案和1种220kV接入系统方案,对各方案从接入点、工程实施难度、电网潮流、短路电流、工程投资等方面进行综合比较,最终确定了易县抽水蓄能电站以2回500kV出线接入慈云变电站的方案,结合接入系统方案所确定的2回出线规模,通过技术经济比较,确定易县抽水蓄能电站发变组采用联合接线、开关站采用角型接线方案。

According to the geographical position and grid structure of Yi＇xian Pumped Storage Power Station,three schemes of connecting to power grid in 500 kV and one scheme of connecting to power grid in 220 kV are put forward.After the comprehensive comparison of each scheme from the point of access,the difficulty of the project,power flow,short-circuit current and project investment,the final scheme is determined that connecting to Ci＇yun substation by two 500 kV lines.Combined with determined scheme of two lines scale,through technical and economic comparison,the joint connection of the generator and transformer group of Yixian Pumped Storage Power Station is determined,and the switch station adopts angle type connection.