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(shí)的電能抽水至上水庫(kù),在電力負(fù)荷高峰期再放水至下水庫(kù)發(fā)電的水電站,又稱(chēng)蓄能式水電站。隨著國(guó)內(nèi)核電及風(fēng)電、太陽(yáng)能等清潔能源電站的投建,電網(wǎng)對(duì)調(diào)峰調(diào)頻電源的需求趨于緊迫,國(guó)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(xiàng)重要工作內(nèi)容,水力過(guò)渡過(guò)程調(diào)節(jié)保證設(shè)計(jì),對(duì)于電站運(yùn)行的安全性具有至關(guān)重要的意義。研究球閥參與過(guò)渡過(guò)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(duì)于提高抽水蓄能電站建設(shè)的可靠性、確保已建成電站運(yùn)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(guò)渡過(guò)程調(diào)節(jié),本文采用CFD方法,分別開(kāi)展了球閥過(guò)流特性計(jì)算及分析、甩負(fù)荷球閥動(dòng)水關(guān)閉過(guò)程受力計(jì)算及分析等研究工作,獲得了球閥在各開(kāi)度下對(duì)應(yīng)的流量系數(shù)、局部阻力系數(shù),以及動(dòng)水關(guān)球閥過(guò)程球閥的受力情況。以上研究成果對(duì)于降低球閥設(shè)計(jì)開(kāi)發(fā)費(fèi)用,提高電站設(shè)計(jì)準(zhǔn)確性,運(yùn)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(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TV743;TV134

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本文編號(hào)：1828898