太陽能熱發(fā)電站熱力系統(tǒng)動態(tài)特性仿真
發(fā)布時間:2018-03-05 01:10
本文選題:太陽能熱發(fā)電站 切入點:熱力系統(tǒng) 出處:《重慶大學》2014年碩士論文 論文類型:學位論文
【摘要】:隨著能源危機和大量使用化石能源帶來的環(huán)境問題日益嚴峻,清潔能源吸引了世界各界的目光。太陽能、核能、水能和風能是目前應用最好的四大清潔能源。其中,太陽能熱發(fā)電是大規(guī)模開發(fā)和利用太陽能的一個重要方式,已成為世界各國學者研究的重點。較多學者只對太陽能熱發(fā)電站熱力系統(tǒng)中單一設備或者子系統(tǒng)進行了研究,但是對太陽能熱發(fā)電站整個熱力系統(tǒng)研究較少,所以為了保證太陽能熱發(fā)電站能夠穩(wěn)定、安全地運行,對太陽能熱發(fā)電站整個熱力系統(tǒng)的動態(tài)特性進行研究是非常有必要的。本論文以太陽能熱發(fā)電站熱力系統(tǒng)為研究對象,主要研究了在不同運行模式下,太陽輻照變化時熱力系統(tǒng)的動態(tài)響應。主要工作如下: ①根據(jù)模塊化建模思想,以設備為單元,將該熱力系統(tǒng)分為接收器、油罐、管殼式換熱器(殼側流體是導熱油工質(zhì)、管側流體是水蒸汽)、蒸汽蓄熱器以及汽輪機、凝汽器、除氧器和閥門、泵、管道等模塊。 ②采用集中參數(shù)法建立了油罐、管殼式換熱器、蒸汽蓄熱器的數(shù)學模型和仿真模型,并改寫了以導熱油為工質(zhì)的泵、閥門和管道模塊,對所有新建模塊進行了測試,并將這些模塊加入到MMS模塊庫中。 ③應用MMS仿真平臺,搭建了完整的太陽能熱發(fā)電站熱力系統(tǒng)的仿真模型,進行了仿真模型與實際系統(tǒng)設計值的比較。 ④在此模型基礎上,,完成了輻照度不同擾動方式(階躍、斜坡)、不同幅度(5%、10%)、控制系統(tǒng)不同投入狀態(tài),以及蓄熱系統(tǒng)參與運行等多組仿真試驗研究。 通過仿真計算結果與實際系統(tǒng)值的比較和多組動態(tài)仿真試驗,證明所建模型符合熱動力系統(tǒng)運行機理,具有一定仿真精度。在蓄熱系統(tǒng)未投入運行和輻照變化較小時,可以通過控制系統(tǒng)的調(diào)節(jié)作用,使得汽輪機功率逐漸恢復到額定值;輻照變化較大時,蓄熱系統(tǒng)投入運行,可以有效地降低輻照對汽輪機功率的影響。本文的研究結果為進一步研究控制策略和運行方式奠定了基礎。
[Abstract]:With the energy crisis and the growing environmental problems caused by the massive use of fossil energy, clean energy has attracted worldwide attention. Solar, nuclear, hydro and wind energy are the four best used clean energy sources. Solar thermal power generation is an important way to develop and utilize solar energy on a large scale and has become the focus of scholars all over the world. But there is little research on the whole thermal system of the solar thermal power station, so in order to ensure the stable and safe operation of the solar thermal power station, It is necessary to study the dynamic characteristics of the whole thermal system of solar thermal power station. The dynamic response of thermal system to solar radiation. The main work is as follows:. 1 according to the idea of modular modeling, the thermodynamic system is divided into receiver, oil tank, tube and shell heat exchanger (shell side fluid is heat conduction oil working fluid, tube side fluid is steam steam, steam accumulator, steam turbine, condenser, etc. Deaerator and valves, pumps, pipes and other modules. (2) the mathematical model and simulation model of oil tank, shell heat exchanger and steam accumulator were established by means of lumped parameter method, and the pump, valve and pipeline modules with heat conduction oil as working fluid were rewritten, and all the new modules were tested. These modules are added to the MMS module library. 3 using MMS simulation platform, a complete simulation model of solar thermal power station thermal power system is built, and the simulation model is compared with the actual system design value. 4 on the basis of this model, the simulation experiments of different irradiance disturbance modes (step, slope, different amplitude, different input state of control system and heat storage system are completed. By comparing the simulation results with the actual system values and many dynamic simulation tests, it is proved that the established model accords with the operation mechanism of the thermal power system and has a certain simulation accuracy. By regulating the control system, the steam turbine power can be gradually restored to the rated value. When the radiation change is large, the heat storage system is put into operation. It can effectively reduce the effect of irradiation on steam turbine power. The results of this paper lay a foundation for further study on control strategy and operation mode.
【學位授予單位】:重慶大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:TM615
【參考文獻】
相關期刊論文 前10條
1 廖葵;龍新峰;;塔式太陽能熱力發(fā)電技術進展[J];廣東電力;2007年04期
2 高維;徐蕙;徐二樹;余強;;八達嶺太陽能塔式熱發(fā)電吸熱器水動力特性仿真研究[J];工程熱物理學報;2012年08期
3 杜鳳麗;原郭豐;常春;盧智恒;;太陽能熱發(fā)電技術產(chǎn)業(yè)發(fā)展現(xiàn)狀與展望[J];儲能科學與技術;2013年06期
4 ;光熱發(fā)電 光伏發(fā)電之后的生力軍[J];建筑節(jié)能;2011年08期
5 張雯,應啟戛,楊希明;管殼式換熱器動態(tài)特性分析[J];江西能源;2001年01期
6 吳金星,王定標,魏新利,劉宏;管殼式換熱器殼程流動和傳熱的數(shù)值模擬研究進展[J];流體機械;2002年05期
7 郭鐵錚;劉國耀;劉德有;許昌;郭蘇;;腔式太陽能水/蒸汽吸熱器給水全程控制系統(tǒng)的設計[J];電力與能源;2012年01期
8 趙敏;趙豫紅;周立芳;;太陽能熱發(fā)電蓄熱系統(tǒng)的混雜建模與仿真[J];計算機與應用化學;2012年07期
9 趙智慧;劉立軍;;蒸汽蓄熱器運行特性分析[J];青海電力;2011年04期
10 李顯;朱天宇;徐小韻;;1MW塔式太陽能發(fā)電蓄熱系統(tǒng)熱力計算及分析[J];熱力發(fā)電;2009年11期
本文編號:1568086
本文鏈接:http://sikaile.net/kejilunwen/dianlilw/1568086.html