阻抗孔特性对水电站水力干扰过渡过程的影响研究
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引用本文:张超1,张帅2,张晓宏2.阻抗孔特性对水电站水力干扰过渡过程的影响研究[J].电网与清洁能源,2020,36(12):97~100
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作者单位
张超1 1. 中国电建集团 西北勘测设计研究院有限公司 
张帅2 2. 西安理工大学 
张晓宏2 2. 西安理工大学 
基金项目:国家自然科学基金项目(51279162)
中文摘要:采用水电站过渡过程通用程序,分析研究了某大型水电站阻抗孔特性对水力干扰过渡过程的影响,结果表明:无论是并入理想大电网还是并入有限电网,当阻抗孔尺寸或流量系数发生改变时,对受扰机组的出力摆动结果都有明显影响。同一工况下,阻抗孔直径或流量系数越大,受扰机组出力摆动越大;并入理想大电网的出力摆动均大于对应情况下并入有限电网的出力摆动;适当减小阻抗孔面积,有利于保证过渡过程中机组工作的稳定性,并可节省工程费用。
中文关键词:主调压室  阻抗孔  水力干扰  出力摆动  涌浪水位
 
Research on Influence of Impedance Hole Characteristics on Hydraulic Disturbance Transition Process of Hydropower Stations
Abstract:The general procedure for the transition process of a hydropower station is used to analyze the influence of the impedance hole characteristics of a large hydropower station on the hydraulic disturbance transition process. The results show that when the impedance hole size or flow coefficient are changed, the output swing of the disturbed turbine unit will be obviously affected whether the unit is integrated into an ideal large power grid or a limited power grid. Under the same working condition, the larger the diameter of the impedance hole or the flow coefficient is, the greater the output swing of the disturbed unit is; the output swing of the unit integrated into the ideal large power grid is always larger than the corresponding value with the limited power grid. Therefore, appropriately reducing the impedance hole area is conducive to ensuring the stability of the unit in the transition process, and can save the project cost.
keywords:main surge chamber  impedance hole  hydraulic disturbance  the output swing  surge water level
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