本文選題：超長引水明渠 + 壓力前池　； 參考：《南水北調(diào)與水利科技》2017年02期

【摘要】：過渡過程計(jì)算分析對水電站安全運(yùn)行極為重要�；谝痪S明渠和有壓管道的非恒定流基本理論,針對某具有超長引水明渠的水電站,構(gòu)建了"長引水明渠+壓力前池+壓力管道+機(jī)組"的過渡過程數(shù)學(xué)模型。根據(jù)邊界條件,分別利用特征線法計(jì)算有壓管道的瞬變過程和Preissmann隱式差分法計(jì)算明渠的瞬變過程。重點(diǎn)分析了本電站在機(jī)組甩負(fù)荷工況和增負(fù)荷工況下,引水明渠和壓力前池中水位和流量的變化過程。并根據(jù)明渠淺水波傳播慢的特點(diǎn),針對電站增負(fù)荷工況,提出了該電站合理的運(yùn)行調(diào)度方式,既保證了引水明渠及前池的最低水位滿足安全運(yùn)行要求,又保證了電站運(yùn)行時一定的經(jīng)濟(jì)效益,可對類似的工程運(yùn)行提供參考。
[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.
【作者單位】： 河海大學(xué)水利水電學(xué)院;
【基金】：國家自然科學(xué)基金(51379064) 江蘇省自然科學(xué)基金(BK20130839)~~
【分類號】：TV732

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