水轮发电机功率摆动的分析和处理  

Analysis and Handling of Generator Power Swing

作　　者：马建峰 李文峰 

机构地区：[1]浙江富春江水电设备有限公司,杭州310013

出　　处：《西北水电》2015年第1期69-72,共4页Northwest Hydropower

摘　　要：某机组在偏离最优工况运行时,进入尾水管的水流夹带着空化气泡在离心力的作用下形成同水流共同旋进的尾水涡带,并在周期性非平衡因素的影响下产生偏心。尾水管压力脉动频率和发电机在电网中的自然振荡频率相近引起输出功率剧烈摆动。采用CFD分析确定尾水管内安装导流板方案以及有限元方法分析导流板的刚强度,最终圆满处理功率摆动问题。Under the action of the centrifugal force,the water flow entering into the draft tube forms tail water vortex zone jointly running in vortex with the flow while one unit operates at a deviated optimum operation condition. Impacted by the periodic unbalance factors,eccentricity is caused by the flow. The output power swings violently because the pressure fluctuation frequency of the draft tube and the natural oscillation frequency of the generator in the grid are close. By CFD analysis,the guide vane is proposed to install in the draft tube as well as the strength of the guide vane is analyzed by the finite element method. Finally,the power swing is handled

关 键 词：功率摆动 压力脉动频率 CFD 有限元 

分 类 号：TV734.21[水利工程—水利水电工程]