我县电网是一个以小水电为主的孤立电网。装机容量为4775千瓦,其中有2台500千瓦的柴油发电机。容量最大的外屯水电站装有两台单机容量为800千瓦和一台400千瓦的机组。由于多数小水电站无调节水库,在枯水期有功出力受水量限制下降到不足1000千瓦。此时两台柴油发电机组投入运行。随着我县工农业生产的发展,电感性负载不断增加,电网功率因数很低。为了维持 My county power grid is an isolated power grid based on small hydropower. Installed capacity of 4775 kilowatts, of which two 500 kilowatts of diesel generators. The largest Tuen Mun hydroelectric power station is equipped with two 800-kilowatt units and a 400-kilowatt unit. Due to the fact that most small hydropower stations have no regulated reservoirs, the output of active power in the dry season is reduced to less than 1000 kilowatts by the water limit. At this point two diesel generator sets put into operation. With the development of industrial and agricultural production in our county, the inductive load is continuously increasing, and the grid power factor is very low. In order to maintain