双绕组电抗分流式自励恒压同步发电机,由于其先天性的缺点——外特性的硬度,在不同的功率因数时,不尽相同。甚至当低功率因数时,在外特性的某些部位上有上翘现象;农村社队小水电站,多数又处于大电网的末端,电压很低,有时只达到350伏甚至更低;再加上小水电站的管理人员多数技术水平较低,并网操作无经验,经常出现并网失败的现象等。 Double-winding reactive shunt self-excited constant voltage synchronous generator, due to its inherent shortcomings - the hardness of the external characteristics, at different power factor, not the same. Even at low power factors there is upturn in some parts of the external characteristics; rural commune and small hydropower plants, most of them at the end of large power grids, have low voltages, sometimes only 350 volts or less; plus small The majority of hydropower station managers are less skilled and have no experience in grid-connected operation and often fail to participate in the grid.