摘要
针对白莲河抽水蓄能电站在低水头大开度下发电运行时发生的机组功率振荡现象,本文旨在探究其产生原因并分析功率振荡与系统相关参数之间的关系。首先构建了包括尾水管空腔涡的机组一维时域分析模型;其次采用特征线法对该现象进行了数值模拟及与实测结果对比分析,最后对空腔涡参数、调速器参数、导叶最快启闭速率、调节模式与机组功率振荡之间的关联进行了敏感性分析。结果表明,功率振荡是由空腔涡引起的;调速器参数和导叶最快启闭速率对空腔涡作用下的功率振荡几乎没有影响,功率振荡主要取决于空腔涡空化柔性系数和质量流量增益。这为抽水蓄能电站安全运行提供了相关的理论依据。
This paper explores the cause of power oscillation and analyzes its relationship with system parameters through a case study of the power oscillation of generating units at Bailianhe pumped-storage station in generation mode under the conditions of low heads and large valve openings.First,we construct a one-dimensional numerical model for time domain analysis including the calculation of draft tube cavity vortices;then,the method of characteristics is used to solve the model with its simulations compared with measurements.Finally,we conduct a sensitivity analysis of the relationship between cavity vortex parameters,governor parameters,peak opening and closing speeds of guide vanes,regulation mode,and power oscillation.The results show that the power oscillation is caused by the cavity vortex rope,while governor parameters or peak opening and closing speeds have little effect on its occurrence under the influence of the cavity vortex.And it mainly depends on the cavity compliance and the mass flow gain factor of the cavity vortex rope.Thus,the results lay a theoretical basis for safe operation of pumpedstorage stations.
作者
夏自平
晏文杰
杨桀彬
程永光
黄高鹏
杨建东
XIA Ziping;YAN Wenjie;YANG Jiebin;CHENG Yongguang;HUANG Gaopeng;YANG Jiandong(Hubei Bailianhe Pumped-Storage Power Company Limited,Huanggang,Hubei 438617;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072)
出处
《水力发电学报》
EI
CSCD
北大核心
2021年第2期141-148,共8页
Journal of Hydroelectric Engineering
基金
国家自然科学基金重点项目(51839008)。
关键词
抽水蓄能电站
功率振荡
特征线法
空腔涡参数
调节模式
pumped-storage power station
power oscillation
method of characteristics
cavity vortex parameters
regulation mode
