發(fā)布時間：2018-05-01 10:14

  本文選題：抽水蓄能 + 球閥　； 參考：《華北電力大學(xué)(北京)》2017年碩士論文

【摘要】：抽水蓄能電站是利用電力負(fù)荷低谷時的電能抽水至上水庫,在電力負(fù)荷高峰期再放水至下水庫發(fā)電的水電站,又稱蓄能式水電站。隨著國內(nèi)核電及風(fēng)電、太陽能等清潔能源電站的投建,電網(wǎng)對調(diào)峰調(diào)頻電源的需求趨于緊迫,國內(nèi)抽水蓄能電站建設(shè)明顯加速。作為抽水蓄能電站建設(shè)可行性研究階段的一項重要工作內(nèi)容,水力過渡過程調(diào)節(jié)保證設(shè)計,對于電站運行的安全性具有至關(guān)重要的意義。研究球閥參與過渡過程調(diào)節(jié)的安全性以及優(yōu)化球閥、導(dǎo)葉協(xié)聯(lián)關(guān)閉規(guī)律對于提高抽水蓄能電站建設(shè)的可靠性、確保已建成電站運行的安全性性具有重要意義。為研究抽水蓄能電站球閥參與過渡過程調(diào)節(jié),本文采用CFD方法,分別開展了球閥過流特性計算及分析、甩負(fù)荷球閥動水關(guān)閉過程受力計算及分析等研究工作,獲得了球閥在各開度下對應(yīng)的流量系數(shù)、局部阻力系數(shù),以及動水關(guān)球閥過程球閥的受力情況。以上研究成果對于降低球閥設(shè)計開發(fā)費用,提高電站設(shè)計準(zhǔn)確性,運行安全性具有重要的意義。
[Abstract]:Pumped-storage power station is a kind of hydropower station which uses the electric energy at the bottom of the power load to pump water to the lower reservoir during the peak period of the power load, which is also called the storage type hydropower station. With the construction of domestic nuclear power, wind power, solar energy and other clean energy power stations, the demand for peak-shaving and frequency modulation power is becoming urgent, and the construction of domestic pumped storage power stations is accelerating obviously. As an important part of the feasibility study on the construction of pumped storage power station, the design of hydraulic transition process regulation guarantee is of great significance for the safety of power station operation. It is of great significance to study the safety of ball valve participating in the adjustment of transition process and to optimize the ball valve and the closing rule of the United guide vane for improving the reliability of the construction of pumped storage power station and ensuring the safety of the operation of the completed power station. In order to study the role of ball valve in the process of transition regulation in pumped storage power station, the CFD method is used to calculate and analyze the overflow characteristics of ball valve, and to calculate and analyze the stress of ball valve in the course of dynamic water closure of load rejection ball valve. The flow coefficient, the local resistance coefficient and the stress condition of the ball valve during the course of the dynamic shutoff ball valve are obtained. The above research results are of great significance to reduce the cost of ball valve design and development, improve the accuracy of power plant design and operation safety.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TV743;TV134

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本文編號：1828898