上下游双调压室水力发电系统小波动调节品质研究  

Research on Regulation Quality of Hydropower Generation System with Double Surge Chambers Under Small Fluctuation

作　　者：曹林宁[1] 敖家伟 吴道科 李兵 张赫 CAO Lin-ning;AO Jia-wei;WU Dao-ke;LI Bing;ZHANG He(Cl.College of Energy and Electrical Engineering,Hohai University,Nanjing 210098,China;Anhui Jixi Pumped Storage Co.,Ltd,Jixi 245300,China)

机构地区：[1]河海大学能源与电气学院,江苏南京210098 [2]安徽绩溪抽水蓄能有限公司,安徽绩溪245300

出　　处：《水电能源科学》2021年第12期177-180,共4页Water Resources and Power

摘　　要：鉴于水力发电系统在小波动过渡过程中的调节品质对电站稳定运行影响重大,以带上下游双调压室的水力发电系统为例,基于simulink平台建立系统数学模型,并对考虑系统受到10%负荷扰动进行仿真研究。结果表明,上下游调压室水位波动对机组转速尾波影响较大,可通过增加调压室大井面积来减少机组转速尾波振荡次数和调节时间;机组转速主波与上下游调压室之间压力管道水流惯性时间常数密切相关,通过减小两调压室之间的距离可明显控制机组转速的最大偏差值;尾水隧洞沿程水头损失对尾水调压室水位波动和机组转速尾波变化影响很大,若不考虑水头损失则会导致尾水调压室水位发散,机组转速主波虽能趋于稳定,但尾波会出现持续震荡且幅值逐渐增大,对机组运行十分不利。The regulation quality of hydropower generation system in the transient process of small fluctuations has a great impact on the stable operation of the power station.Taking the hydropower system with upstream and downstream surge chambers as an example,the mathematical model of the system was established based on simulink platform,and the simulation study was carried out considering the 10%load disturbance of the system.The results show that the fluctuation of water level in the upstream and downstream surge chambers has a great impact on the tail wave of unit speed.The number of oscillation times and regulating time of unit speed wake can be reduced by increasing the large well area of surge chamber.The main wave of the unit speed is closely related to the inertia time constant of the flow in the pressure pipeline between the upstream and downstream surge chambers.The maximum deviation of the unit speed can be obviously controlled by reducing the distance between the two surge chambers.The head loss along the tailrace tunnel has a great impact on the water level fluctuation of the tailrace surge tank and the variation of the unit speed wake wave.If the head loss is not considered,the water level in the tailrace surge chamber will diverge.Although the main speed wave of the unit can be stabilized,the tail wave will continue to vibrate and the amplitude will gradually increase,which is very unfavorable to the operation of the unit.

关 键 词：上下游双调压室 水力发电系统 小波动 调节品质 

分 类 号：TV743[水利工程—水利水电工程]