特性曲线及转轮选型对抽水蓄能电站过渡过程的影响  

Analysis of the Influence of the Selection of Characteristic Curve and Runner Diameter on the Transient Process of Pumped Storage Power Station

作　　者：彭煜民 刘程鹏 高彦明 杨桀彬[2] 杨建东[2] PENG Yumin;LIU Chengpeng;GAO Yanming;YANG Jiebin;YANG Jiandong(China Southern Power Grid Power Generation Company,Guangdong 510635,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China)

机构地区：[1]南方电网调峰调频发电有限公司,广东省广州市510635 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北省武汉市430072

出　　处：《水电与抽水蓄能》2021年第5期70-75,共6页Hydropower and Pumped Storage

基　　金：国家重点研发计划(2017YFB0903700);国家自然科学基金(51879200)。

摘　　要：为研究特性曲线以及转轮选型对抽水蓄能电站过渡过程的影响,本文基于两套特性曲线进行转轮选型,在得到两套转轮参数后,采用数值模拟方法对两者进行三个典型工况的过渡过程计算。计算结果表明:选取特性曲线时,应尽量采用S特性曲线二区开度线变化斜率较大的特性曲线;转轮选型应当避免采用过大或过小的转轮直径,过小的直径将导致水泵工况无法满足调节保证计算的要求,过大则会使得水轮机工况点靠近S区域;并且特性曲线以及转轮选型对机组相继甩负荷工况的最不利间隔时间及尾水管进口处最小压力有着显著的影响,二区开度线变化斜率较大且转轮直径适中是提高相继甩负荷工况下尾水管进口处最小压力有效设计措施。To study the influence of the selection of characteristic curve and runner diameter on the transient process of pumped storage power station,this paper carries out the selection of runner dimeter based on two sets of characteristic curves.After obtaining two sets of runner parameters,numerical simulation method is used to calculate the transition process under three typical conditions.The calculation results show that:when choosing the characteristic curve,the characteristic curve with large slope of opening line in the second zone of S characteristic curve should be chosen as far as possible;In the runner diameter selection,too large or too small runner diameter should be avoided.Too small diameter will result in the pump operating condition not meeting the requirements of regulation guarantee calculation,and too large will cause the operating point of the turbine to be close to S area;Moreover,selection of characteristic curve and runner diameter have a significant impact on the most unfavorable interval time and the minimum pressure at the draft tube inlet under the condition of successive load rejection.Choosing relatively large slope of the second zone opening line and the moderate runner diameter are the effective design measures to increase the minimum pressure at the draft tube inlet under the condition of successive load rejection.

关 键 词：特性曲线 转轮选型 过渡过程 抽水蓄能电站 

分 类 号：TV744[水利工程—水利水电工程]