抽水蓄能电站可逆机组导叶关闭规律探析

Closing Law of Guide Vane of Reversible Pump-turbine for Pumped Storage Power Stations

以东北某抽水蓄能电站为例,针对可逆机组独特的过流特性问题,研究了可逆式机组甩负荷后导叶紧急关闭规律对抽水蓄能电站过渡过程的影响,对比分析了具有延时段的直线与折线关闭规律。结果表明,该方法确保了机组飞逸转速在允许范围内,并有效降低了输水系统中的水击压力上升值,为电站的安全提供了依据。

Taking pumped storage power stations in the northeast of China for an example, according to the unique water passing properties of reversible pump-turbine, the influence of emergent closing laws of guide vane on transient process is studied under the load shedding operation. The single-slope and two-segment closing law with time delay are comparative analysis each other. The results show that the proposed method not only ensures that the runaway rotational speed of the unit is within the permissible limits, but also reduces the water pressure rise in conveyance system effectively, which provides basis for safe operation of pumped storage power stations.