大顶子山航电枢纽工程电气主接线方案比较

Comparison of electric main wiring scheme for Dadingzishan navigation power junction

根据电站装机规模及双回66 kV电压接入电力系统的条件,经过综合技术经济比较,最后确定技术上可行,经济上合理的主接线方案。发电机变压器组合采用发电机主变压器组成三机—变扩大单元接线,从两段发电机电压母线上各取一回厂用电电源;66kV侧采用变压器—线路组(带备用断路器)接线。

Based on the installed capacity of hydroelectric power station and the condition of the double circuit transmission of 66kV voltage to connect power system,the paper puts forward the main wiring scheme with viable technology and reasonable economy through the comparison of technology and economy.The scheme is that taking combination of generator and main transformer as three generators and one transformer to expand unit connection,power supply from two voltage buses of generator separately to plant,transformer-line block(back-up circuit breaker) at the side of 66kV.