福州特高压变电站500kV主接线方案优化

Scheme Optimization of 500 kV Main Electrical Connection in Fuzhou UHV Substation

福州特高压变电站是特高压电网进入福建的首站,其500 kV主接线方案对省内500 kV电网结构和安全稳定有重要影响。根据福州特高压工程的建设规划和福建500 kV电网特点,分别从电网结构、潮流分布、短路电流、经济性等方面对福州特高压变电站500 kV主接线方案进行了分析。福州特高压500 kV电气主接线方案未采用三分之二接线数与主变数匹配的常规方案,而采用东、西送电通道分列的方案。分析结果表明,采用的方案结合福建电网实际情况,有效地加强了沿海输电通道,较其他方案对未来电网潮流方式变化有更好的适应性,并且还具有投资节省、施工周期短、运行维护方便等优点。

As the first station of UHV power grid in Fujian,the 500 kV main connection scheme of Fuzhou UHV substation affects the steady and security of local power grid. According to the construction schedule of Fuzhou UHV substation and the characters of Fujian 500 kV power grid,this paper analyzed the 500 kV main electrical connection of Fuzhou UHV substation,from the aspects of network structure,power flow distribution,short-circuit current,economical efficiency and so on. Instead of traditional scheme in which the number of transformer matches the number of 3 /2 unit,the recommended scheme for 500 kV main connection of Fuzhou UHV substation is setting up east and west transmission channel respectively. The analysis results show that the recommended scheme combines the actual situation of Fujian power grid,and can efficiently enhance the power transmit thoroughfare of coastal area. The recommended scheme has a better adaptability to the change of future power flow distribution than other schemes,also has the advantages of investment saving,short construction period,convenient operation and maintenance,etc.