【摘要】：水力發(fā)電機(jī)組作為電網(wǎng)中重要的骨干電源,主要承擔(dān)電網(wǎng)調(diào)頻、調(diào)峰任務(wù),保證其良好的調(diào)節(jié)品質(zhì)以及高質(zhì)量的電能輸出具有重要的意義。對(duì)于含調(diào)壓室水電站而言,在小波動(dòng)過(guò)程中,水輪發(fā)電機(jī)組經(jīng)常會(huì)因?yàn)檎{(diào)壓室水位波動(dòng)而產(chǎn)生轉(zhuǎn)速尾波衰減速度過(guò)慢等問(wèn)題,進(jìn)而影響機(jī)組調(diào)節(jié)品質(zhì),這些問(wèn)題一直是人們關(guān)注的焦點(diǎn)。為提高系統(tǒng)調(diào)節(jié)品質(zhì),工程中常將調(diào)壓室布置在距離水輪機(jī)較近的位置,但也常因此帶來(lái)尾波問(wèn)題較為嚴(yán)重,甚至為了減小尾波影響不惜增加調(diào)壓室斷面面積,使整個(gè)工程的預(yù)期投資金額大幅度增加。所以,對(duì)于此類(lèi)水電站,研究分析各因素對(duì)含調(diào)壓室水電站小波動(dòng)調(diào)節(jié)品質(zhì)的影響規(guī)律等問(wèn)題有著重要的工程應(yīng)用價(jià)值和理論指導(dǎo)意義。首先,本文建立了包含壓力管道、調(diào)壓室、尾水隧洞、水輪發(fā)電機(jī)組、調(diào)速器等多個(gè)部件在內(nèi)的調(diào)節(jié)系統(tǒng)的五階數(shù)學(xué)模型。其次,由于五次及以上的方程無(wú)法求取解析解,因此需要對(duì)原五階系統(tǒng)進(jìn)行簡(jiǎn)化處理。本文通過(guò)理論推導(dǎo)和數(shù)值仿真分析了各因素對(duì)過(guò)渡過(guò)程中機(jī)組轉(zhuǎn)速變化的影響大小,發(fā)現(xiàn)壓力管道水擊壓力波引起的機(jī)組水頭變化對(duì)水輪機(jī)流量特性的影響不大,忽略后機(jī)組轉(zhuǎn)速波動(dòng)與原系統(tǒng)機(jī)組的轉(zhuǎn)速波動(dòng)過(guò)程非常接近,由此將原模型簡(jiǎn)化為四階模型;對(duì)四階模型的特征方程進(jìn)行分解后得到兩個(gè)二階環(huán)節(jié)的疊加,這兩個(gè)二階環(huán)節(jié)分別表征了轉(zhuǎn)速的主波和尾波特征;通過(guò)分析這兩個(gè)二階環(huán)節(jié)最終得到了超調(diào)量、調(diào)節(jié)時(shí)間等表征調(diào)節(jié)品質(zhì)指標(biāo)的解析表達(dá)式,并通過(guò)工程實(shí)例驗(yàn)證了解析公式的正確性,此研究成果為類(lèi)似電站提供了參考依據(jù)。最后,以調(diào)節(jié)品質(zhì)指標(biāo)的理論表達(dá)式為基礎(chǔ),結(jié)合工程實(shí)例研究了調(diào)壓室位置、調(diào)壓室斷面面積、調(diào)速器參數(shù)、發(fā)電機(jī)及負(fù)載自調(diào)節(jié)系數(shù)、機(jī)組慣性時(shí)間常數(shù)等因素對(duì)小波動(dòng)調(diào)節(jié)品質(zhì)的影響規(guī)律,并通過(guò)數(shù)值仿真進(jìn)行了對(duì)比驗(yàn)證。
[Abstract]:As an important backbone power supply in the power network, hydroelectric generating units are mainly responsible for the tasks of power network frequency modulation and peak regulation. It is of great significance to ensure its good regulating quality and high quality power output. For the hydropower station with surge chamber, in the process of small fluctuation, the speed coda attenuation speed is too slow due to the fluctuation of water level in the surge chamber, which further affects the regulating quality of the unit. These problems have always been the focus of attention. In order to improve the regulating quality of the system, the surge chamber is often arranged near the hydraulic turbine in engineering, but the coda problem is often serious, even in order to reduce the influence of the coda, the section area of the surge chamber is increased. The expected investment in the whole project has increased substantially. Therefore, for this kind of hydropower station, it has important engineering application value and theoretical guiding significance to study and analyze the influence of various factors on the regulation quality of small fluctuation regulation of hydropower station with surge chamber. First of all, the fifth order mathematical model of regulating system including pressure pipe, surge chamber, tailrace tunnel, turbine generator set, governor and so on is established in this paper. Secondly, because the equations of order 5 and above can not be solved, it is necessary to simplify the original fifth order system. In this paper, through theoretical derivation and numerical simulation, the influence of various factors on the speed change of the turbine during the transition process is analyzed. It is found that the change of the turbine head caused by the water hammer pressure wave of the pressure pipe has little effect on the flow characteristics of the turbine. The speed fluctuation of the unit is very close to that of the original system, so the original model is simplified to the fourth order model. After decomposing the characteristic equations of the fourth-order model, the superposition of two second-order links is obtained. The two second-order links represent the main wave and coda characteristics of the rotational speed respectively. Through the analysis of the two second-order links, the analytical expressions of the overshoot quantity and the regulating time are obtained, and the correctness of the analytical formula is verified by an engineering example. The research results provide a reference for similar power stations. Finally, based on the theoretical expression of regulating quality index, the location of surge chamber, the sectional area of surge chamber, the parameters of governor, the self-regulating coefficient of generator and load are studied in combination with engineering examples. The influence of inertia time constant on the regulation quality of small fluctuation is compared and verified by numerical simulation.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TV732.5

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 吳秀云,王豪杰,楊麗明,羅宏鋒,王念慎,鄭大瓊;氣壓式調(diào)壓室的應(yīng)用研究[J];北京工業(yè)大學(xué)學(xué)報(bào);2002年04期

2 程永光,楊建東;用三維計(jì)算流體力學(xué)方法計(jì)算調(diào)壓室阻抗系數(shù)[J];水利學(xué)報(bào);2005年07期

3 宋長(zhǎng)福;夏小娟;;基于水錘—調(diào)壓室聯(lián)合計(jì)算的阻抗系數(shù)選擇研究[J];水電能源科學(xué);2005年06期

4 巨榮文;余建強(qiáng);;色爾古電站調(diào)壓室工程施工技術(shù)探討[J];四川水力發(fā)電;2008年01期

5 朱永忠;張健;;用隨機(jī)微分方程模型求解調(diào)壓室涌波[J];河海大學(xué)學(xué)報(bào)(自然科學(xué)版);2008年02期

6 王利卿;楊志豪;楊志超;;水體慣性對(duì)調(diào)壓室波動(dòng)的影響分析[J];河南水利與南水北調(diào);2008年05期

7 王治中;王建林;趙毅力;;水電站調(diào)壓室設(shè)置必要性判式的分析研究[J];西北農(nóng)林科技大學(xué)學(xué)報(bào)(自然科學(xué)版);2008年08期

8 楊勇;;水電站調(diào)壓室的穩(wěn)定性研究[J];紅水河;2011年02期

9 王明鋒;;海甸峽水電站調(diào)壓室穩(wěn)定斷面選定及其涌波計(jì)算[J];水利規(guī)劃與設(shè)計(jì);2011年03期

10 袁義發(fā);樊紅剛;李鳳超;陳乃祥;;計(jì)及管道特性的調(diào)壓室三維流場(chǎng)計(jì)算研究[J];水力發(fā)電學(xué)報(bào);2012年01期

相關(guān)會(huì)議論文 前7條

1 包冀邢;王立成;段雪瑩;;齊熱哈塔爾水電站調(diào)壓室結(jié)構(gòu)有限元設(shè)計(jì)[A];2012全國(guó)水工泄水建筑物安全與病害處理技術(shù)應(yīng)用�？痆C];2012年

2 胡亮;雷振華;杜曉曉;;電站調(diào)壓室滑模的應(yīng)用[A];科技創(chuàng)新與現(xiàn)代水利——2007年水利青年科技論壇論文集[C];2007年

3 賀翠華;王小梅;楊建東;;氣墊調(diào)壓室氣室常數(shù)敏感性分析[A];2007年湖南水電科普論壇論文集[C];2007年

4 華富剛;胡明;;帶狹長(zhǎng)上室調(diào)壓室水面線的非恒定數(shù)值仿真計(jì)算[A];抽水蓄能電站工程建設(shè)文集（2008）[C];2008年

5 劉德有;王豐;張健;陳付山;;抽水蓄能電站采用氣墊式上游調(diào)壓室的探討[A];2004年全國(guó)抽水蓄能學(xué)術(shù)年會(huì)論文集[C];2004年

6 馬林艷;孫璇;;粟子坪調(diào)壓室安全監(jiān)測(cè)設(shè)計(jì)[A];全國(guó)大壩安全監(jiān)測(cè)技術(shù)信息網(wǎng)2008年度技術(shù)信息交流會(huì)暨全國(guó)大壩安全監(jiān)測(cè)技術(shù)應(yīng)用和發(fā)展研討會(huì)論文集[C];2008年

7 曾艷梅;黃素滿;喻忻;;Rudbar水電站水力過(guò)渡過(guò)程分析研究[A];水電設(shè)備的研究與實(shí)踐——第十七次中國(guó)水電設(shè)備學(xué)術(shù)討論會(huì)論文集[C];2009年

相關(guān)重要報(bào)紙文章 前1條

1 本報(bào)記者 李忠海;世界最大的差動(dòng)式調(diào)壓井群[N];涼山日?qǐng)?bào)(漢);2009年

相關(guān)博士學(xué)位論文 前2條

1 鮑海艷;水電站調(diào)壓室設(shè)置條件及運(yùn)行控制研究[D];武漢大學(xué);2010年

2 朱永忠;水電站水擊和調(diào)壓室涌浪的隨機(jī)數(shù)學(xué)模型及其求解[D];河海大學(xué);2005年

相關(guān)碩士學(xué)位論文 前10條

1 黃興;水電站壓力管道系統(tǒng)時(shí)間變態(tài)水擊模型試驗(yàn)研究[D];重慶交通大學(xué);2015年

2 胡錦蘅;帶匯管調(diào)壓室阻抗系數(shù)研究[D];西華大學(xué);2016年

3 繆明非;長(zhǎng)距離引水式水電站調(diào)壓室水力特性及多目標(biāo)優(yōu)化的研究[D];清華大學(xué);2008年

4 鄭向陽(yáng);有調(diào)壓室水電站多機(jī)一洞時(shí)水力調(diào)速系統(tǒng)穩(wěn)定分析[D];武漢大學(xué);2005年

5 李啟升;高邊墻地下調(diào)壓室襯砌結(jié)構(gòu)工作性態(tài)研究[D];河海大學(xué);2006年

6 劉軍;大型長(zhǎng)廊式調(diào)壓室圍巖穩(wěn)定性及結(jié)構(gòu)特性三維有限元分析[D];四川大學(xué);2006年

7 劉松艦;調(diào)壓室水位波動(dòng)及壓力管道水擊壓強(qiáng)的計(jì)算和試驗(yàn)[D];西安理工大學(xué);2003年

8 陳方亮;調(diào)壓室水力損失特性三維數(shù)值模擬研究[D];河海大學(xué);2007年

9 吉海洋;水電工程調(diào)壓室阻力系數(shù)研究[D];西華大學(xué);2014年

10 陳浩;水電站上下游雙調(diào)壓室引水發(fā)電系統(tǒng)水力過(guò)渡過(guò)程計(jì)算研究[D];四川大學(xué);2003年

，

本文編號(hào)：2359769