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近年来,随着抽水蓄能电站的迅速发展,其过渡过程的研究越显迫切。机组甩负荷过渡过程,比日常运行工况要复杂得多。若转速升高超过允许值,机组振动摆度会明显加剧,机组转动部件离心力增加,可能导致机组受损;压力升高超过允许值,对机组顶盖、蜗壳、压力钢管、进水阀等过流部件均是严峻的考验;尾水管真空超标,可能发生液柱分离,产生的反水锤轻则导致抬机等设备设施受损事故、严重的甚至会发生水淹厂房事故。国内外曾发生
In recent years, with the rapid development of pumped storage power station, the study of its transition process becomes more and more urgent. Unit load shedding process, than the daily operating conditions are much more complex. If the rotating speed exceeds the allowable value, the vibration swing of the unit will be obviously aggravated, and the centrifugal force of rotating parts of the unit will increase, which may result in the damage of the unit. The pressure rise exceeds the allowable value, and the cover, volute, pressure pipe, inlet valve etc. Over-current components are a severe test; excessive vacuum in the draft tube, liquid column separation may occur, resulting in anti-water hammer light lift machine and other equipment and facilities led to damage, serious or even flooding plant accidents. Have occurred at home and abroad