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针对抽水蓄能电站引水道布置对机组尾水管最小压力的影响较大,在相继甩负荷工况下尤为明显的问题,采用特征线法研究了尾水道分别为单洞单机和一洞多机布置形式时,机组上游侧引水道布置在相继甩负荷工况下对尾水管最小压力的影响,以及机组相继甩负荷最危险间隔时间点。结果表明,单洞单机布置情况下,当引水道岔点位置向上游侧移动时,尾水管最小压力将出现大幅增长;而一洞多机布置时引水道岔点位置对尾水管最小压力的影响不显著,由此提出了有利于改善尾水管最小压力的布置形式。
In view of the problem that the layout of diversion channel of Pumped Storage Power Station has a great influence on the minimum pressure of the draft tube of the pumped storage power station and is especially obvious under the successive load shedding conditions, the characteristic of the tailrace is used to study the single- Form, the upper reaches of the unit diversion channel arrangement in the case of successive load shedding on the minimum pressure on the draft tube, and the unit load rejection after the most dangerous time points. The results show that the minimum pressure of draft tube will increase significantly when the position of diversion point moves to the upstream side under single-hole single-machine arrangement. However, the effect of the turnout point on the minimum draft pressure is not significant , Thus proposed to help improve the draft tube minimum pressure of the layout.