由若干小水电站组成的小电网,若功率因数较低,可普遍采用网内小型水轮发电机组作调相运行来提高其功率因数,不必依赖大电网提供无功功率。改变小电网运行机制,提高经济效益。它既不增加设备,操作又简便。 If a small power grid composed of a number of small hydropower stations has a low power factor, the small-sized hydropower generating unit in the network can be generally used for phase-shifting operation to increase its power factor without relying on the large power grid to provide reactive power. Change the operating mechanism of small power grids and improve economic efficiency. It neither adds equipment nor is it easy to operate.