摘要
抽水蓄能机组水力过渡过程特性品质主要体现在水泵水轮机甩负荷工况大波动的控制参数。为了研究导叶关闭规律对水泵水轮机甩负荷工况关键参数的影响,文中采用有压瞬变流理论特征线法,分析了不同关闭规律对甩负荷过程中压力、转速、尾水管真空度等参数的敏感性。研究结果表明,过渡过程中的最大转速上升值发生在机组流量较大时导叶一关一拒工况,导叶关闭规律对转速极值的影响不是很敏感;尾水管最低压力发生在相继甩负荷工况。
The characteristics and quality of the hydraulic transient process of pumped storage units are mainly shown in the large fluctuation control parameters under load rejection conditions of pump-turbine.In order to study the influence of guide vane closing law on the key parameters of pump-turbine under load rejection condition,the characteristic line method of pressure transient flow theory is used to analyze the influence of the closing law on the parameters such as pressure,speed,and draft tube vacuum during the load rejection process.The research shows that the maximum speed increase in the transition process occurs in the condition that the guide vane is closed and rejected when the flow rate of the unit is large,and the closing rule of the guide vane is not very sensitive to the influence of the extreme value of the speed;the minimum pressure of the draft tube occurs in the successive load rejection.condition.
作者
王振营
胡宗邱
李红辉
WANG Zhenying;HU Zongqiu;LI Honghui(Harbin Electric Machinery Company Limited,Harbin 150040,China;China Three Gorges Construction Engineering Corporation,Chengdu 610042,China)
出处
《机械工程师》
2023年第11期127-128,131,共3页
Mechanical Engineer
关键词
甩负荷
导叶关闭规律
最大转速
最低压力
load rejection
guide vane closing law
maximum speed
minimum pressure