抽水蓄能机组导叶延时关闭规律浅析

Analysis on Delay Closing Law of Guide Vane of Pumped Storage Units

可逆式水泵水轮机发电运行区域具有明显的S特性,在机组过渡过程中利用这一特性,提出导叶延时后直线关闭规律,人为避开机组转速变化与导叶关闭的共同作用引起较高的水锤压力。本文以仙游抽水蓄能电站为平台,详细介绍了延时关闭规律的实现,并通过现场甩负荷试验验证了导叶延时直线关闭规律可有限降低水锤压力值,满足调保计算要求,保障电站安全可靠运行。

There is obvious S characteristic in gen eratering operation area of Reversible Pump turbine.Taking advantage of this characteristic in the process of unit transition,the linear closing law of guide vane after delay is put forward to avoid the high water hammer pressure caused by the joint action of the change of unit rotational speed and guide vane closing.Taking Xianyou Pumped Storage Power Station as a platform,this paper introduces the realization of the delay closure law in detail,and verifies that the guide vane delay linear closure law can limit the water hammer pressure value by load rejection,meet the calculation requirements of regulation and guarantee,and ensure the safe and reliable operation of the power station.