基于可控两相零式电抗分流励磁系统解决农村小水电站稳定并网方法

针对农村小型水电站发电机普遍采用双绕组电抗分流自励恒压系统,在并网运行时易产生振荡或失磁甚至失步而解列现象.给并网运行带来困难的问题,提出可控两相零式电抗分流励磁系统。研究表明,该系统较原系统各项性能大为提高,能稳定并网运行,具有改造简单、成本低、并网运行可靠、安全性好等技术优势,是一种值得推荐的新励磁品种。

Application Research of Controllable Two-phase Zero-type Reactance Shunt Excitation System in Small Hydropower Station

In view of the fact that the double-winding reactance shunt self-excited constant voltage system is commonly used in rural small hydropower stations,it is prone to oscillation,loss of magnetism or even out of step during the operation of grid connection,which brings difficulties to the operation of grid connection.Therefore,a new controllable twophase zero-type reactance shunt excitation system is proposed to solve the above problems.The test results show that the system is much better than the original system in terms of performance,and can be connected to the grid stably,which has technical advantages of simple transformation,low cost,reliable operation and good safety.Thus,it is a new excitation system worthy of recommendation.