超长引水明渠水电站的过渡过程和运行调度

发布时间：2018-04-21 13:36

本文选题：超长引水明渠 + 压力前池　；参考：《南水北调与水利科技》2017年02期

【摘要】：过渡过程计算分析对水电站安全运行极为重要。基于一维明渠和有压管道的非恒定流基本理论,针对某具有超长引水明渠的水电站,构建了"长引水明渠+压力前池+压力管道+机组"的过渡过程数学模型。根据边界条件,分别利用特征线法计算有压管道的瞬变过程和Preissmann隐式差分法计算明渠的瞬变过程。重点分析了本电站在机组甩负荷工况和增负荷工况下,引水明渠和压力前池中水位和流量的变化过程。并根据明渠浅水波传播慢的特点,针对电站增负荷工况,提出了该电站合理的运行调度方式,既保证了引水明渠及前池的最低水位满足安全运行要求,又保证了电站运行时一定的经济效益,可对类似的工程运行提供参考。
[Abstract]:The calculation and analysis of transition process is very important for the safe operation of hydropower station. Based on the basic theory of unsteady flow in one dimensional open channel and pressure pipeline, a mathematical model of "pressure pipe unit in pressure forepool of long open channel" is constructed for a hydropower station with an overlong open channel. According to the boundary conditions, the transient process of the pressurized pipeline is calculated by the characteristic line method and the transient process of the open channel is calculated by the Preissmann implicit difference method. The variation process of water level and discharge in the open channel and pressure-forebay of the power station under load rejection and load increasing conditions are analyzed emphatically. According to the characteristics of slow propagation of shallow water wave in open channel, the reasonable operation and dispatching mode of the power station is put forward in view of the increasing load condition of the power station, which ensures that the lowest water level of the open channel and the forebay can meet the requirements of safe operation. At the same time, the economic benefit of power station operation is guaranteed, which can provide reference for similar engineering operation.
【作者单位】：河海大学水利水电学院;
【基金】：国家自然科学基金(51379064) 江苏省自然科学基金(BK20130839)~~
【分类号】：TV732

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