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当水轮发电机组的负荷发生变动时,机组转速及电机频率都随之变动。用调速器控制流过水轮机活动导叶的水流量来稳定频率是大中型水电机组使用的传统方法,这种方法导致机组结构和使用维护都很复杂,而且每千瓦的设备价格也大。在微小型(几十千瓦至几千瓦)机组上要获得价兼物美的效果,较好的办法是水轮机取消活动导叶,也不用调速器,让水轮机经常在恒定流量(即恒定输入功率)情况下运转,而当输出功率变动时,借助于结构简单的电子负荷控制器以保持机组频率的稳定。
When the turbine generator load changes, the unit speed and the motor frequency will change. Using a governor to control the flow of water flowing through the guide vane of a turbine to stabilize the frequency is a traditional method used by large and medium-sized hydropower units. This method results in a complex structure and maintenance of the unit, with a large cost per kilowatt. In miniature (tens of kilowatts to several kilowatts) units to get the price and the effect of the United States, the better approach is to cancel the turbine guide vane, without the governor, so that the turbine often at a constant flow (ie constant input power) Case of operation, and when the output power changes, with the help of a simple structure of the electronic load controller to maintain unit frequency stability.