应用阻尼坎的大型水电机组有功振荡抑制方法  

Active power oscillation suppression method of large hydropower unit with damping sill

作　　者：张海库 陈启卷[1] 郑阳 耿清华 王亮[2] ZHANG Haiku;CHEN Qijuan;ZHENG Yang;GENG Qinghua;WANG Liang(School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,China;Datang Hydropower Science&Technology Research Institute Co.,Ltd.,Chengdu 610074,China;College of Water Conservancy&Hydropower,Sichuan University,Chengdu 610065,China)

机构地区：[1]武汉大学动力与机械学院,武汉430072 [2]大唐水电科学技术研究院有限公司,成都610074 [3]四川大学水利水电学院,成都610065

出　　处：《振动与冲击》2021年第17期183-188,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(51379160);西华大学流体及动力机械教育部重点实验室开放性基金项目(szjj2013-001);大唐集团公司科研项目:大型混流式水电机组有功振荡控制优化关键技术及实践。

摘　　要：电力系统稳定关系电网安全,基于增设无压明渠可增大水力阻尼原理,以大型水电机组为研究对象,针对尾水渠道压力脉动引起的有功振荡问题,建立阻尼梯形坎模型,利用FLUENT软件,采用标准的k-ε模型与VOF多相流模型,进行仿真计算,其结果应用一某大型水电机组,并开展现场试验分析。结果表明:所提出的抑制方法可以显著降低有功振荡幅值,满足电网对大型水电机组稳定运行的要求。这对解决电力系统有功振荡研究有工程指导价值。The stability of power system is related to the security of power grid.Here,based on the principle of adding non-pressure open channel being able to increase hydraulic damping,taking a large hydropower unit as the study object,aiming at the problem of active power oscillation caused by pressure fluctuation in tailrace channel,the damping trapezoidal sill model was established.The standard k-εmodel and VOF multiphase flow model were adopted,and the software FLUENT was used to do simulation calculation,and the simulation results were applied in the large hydropower unit.The field tests and analysis were performed.The results showed that the proposed suppression method can significantly reduce amplitude of active power oscillation,and meet requirements of power grid for stable operation of large hydropower unit;the study results have engineering guiding value to solve the active power oscillation problem in power system.

关 键 词：水电机组 尾水渠道 有功振荡 阻尼坎 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3