【摘要】：熱和電是能源互聯(lián)網(wǎng)消費終端中的兩種重要產(chǎn)品,熱電聯(lián)產(chǎn)機組可同時滿足熱和電的供應(yīng)需求,傳統(tǒng)的中間抽汽式供熱機組由于抽汽品質(zhì)仍然較高,依然存在較大的?損失,空冷高背壓供熱模式則是利用排汽作為熱源,更好得符合了“溫度對口,梯級利用”的總能系統(tǒng)原則,近些年得到大力發(fā)展。與傳統(tǒng)抽汽供熱方式相比,直接空冷高背壓供熱機組具有顯著的冷端運行復(fù)雜性,當外界熱負荷和電負荷發(fā)生變化時,機組彈性運行對應(yīng)的參數(shù)狀態(tài)、限制邊界及能耗特性均不同于凝汽式空冷機組或背壓式供熱機組。對于空冷供熱機組,系統(tǒng)供熱特性與環(huán)境溫度存在很強的依變關(guān)系。一方面,環(huán)境溫度變化時刻影響熱負荷供應(yīng)需求;同時,空冷島的冷卻效果也受到環(huán)境風(fēng)溫度和迎面風(fēng)速等因素影響。作為熱源的供熱凝汽器和承擔(dān)剩余冷卻負荷任務(wù)的空冷島作為機組冷端的兩大部分,在變工況運行時也存在著復(fù)雜的耦合關(guān)系�？紤]到冬季供熱的重要性,大部分機組均采取“以熱定電”的運行方式以滿足熱負荷實時變化需求;空冷島在冬季也有著嚴格的阻塞背壓和防凍流量要求,因此,研究直接空冷高背壓供熱機組的梯級供熱特性,以及不同工況下空冷系統(tǒng)與供熱系統(tǒng)的協(xié)同運行優(yōu)化至關(guān)重要。在新能源裝機比例不斷上升的新常態(tài)下,熱電機組如何應(yīng)對能源供給側(cè)改革的要求值得關(guān)注。基于EES和Ebsilon平臺建立了直接空冷高背壓供熱機組的傳熱和供熱特性模型,針對不同的熱負荷和電負荷狀況,探討熱網(wǎng)采用質(zhì)調(diào)節(jié),量調(diào)節(jié),質(zhì)-量并行調(diào)節(jié)時機組冷端參數(shù)的變化和彈性運行的邊界,以汽輪機背壓為特征參數(shù)確定機組在特定負荷下不同運行工況的能耗情況,以西北地區(qū)某省級電網(wǎng)的用電負荷,風(fēng)電負荷及熱負荷為案例,探討供熱期內(nèi)典型溫度范圍內(nèi)的高背壓供熱機組的彈性運行能力,得到了熱電彈性運行對于風(fēng)力發(fā)電波動的平抑效果,為能源互聯(lián)網(wǎng)供給側(cè)改革和區(qū)域能源規(guī)劃提供參考。
[Abstract]:Heat and electricity are two important products in the energy internet consumption terminal. The heat and electricity cogeneration unit can meet the supply demand of heat and electricity at the same time. Loss, air cooling high back pressure heating mode is to use exhaust steam as heat source, better in line with the "temperature matching, cascade utilization" of the total energy system principle, has been vigorously developed in recent years. Compared with the traditional extraction heating mode, the direct air-cooled high backpressure heating unit has remarkable cold end operation complexity. When the external heat load and electric load change, the corresponding parameter state of the unit's elastic operation is obtained. The limited boundary and energy consumption characteristics are different from condensed air cooling units or backpressure heat supply units. For air-cooled heating units, there is a strong dependent relationship between system heating characteristics and ambient temperature. On the one hand, the change of ambient temperature affects the demand of heat load supply, and the cooling effect of air-cooled island is also affected by the factors such as the ambient wind temperature and the direct wind speed. The heating condenser as a heat source and the air-cooled island which takes on the task of residual cooling load as the two parts of the unit cold end also have complex coupling relations in the operation of variable working conditions. Considering the importance of heating in winter, most units adopt the operation mode of "heating with heat" to meet the demand of real-time change of heat load. The air-cooled island also has strict requirements of blocking back pressure and anti-freezing flow in winter, so, It is very important to study the cascade heating characteristics of direct air cooling high back pressure heating units and to optimize the coordinated operation of air cooling system and heating system under different working conditions. Under the new normal condition with the increasing proportion of new energy installed, how to deal with the demand of energy supply side reform is worthy of attention. Based on the platform of EES and Ebsilon, the heat transfer and heating characteristic model of direct air cooling high back pressure heating unit is established. According to the different heat load and electric load, the heat network adopts quality regulation and quantity regulation. The change of unit cold end parameters and the boundary of elastic operation under the condition of parallel quality and quantity regulation. The energy consumption of the unit under different operating conditions under specific load is determined by the characteristic parameters of steam turbine back pressure, and the power load of a provincial power network in Northwest China is used. Wind power load and heat load are taken as examples to discuss the elastic operation ability of high back pressure heat supply units in the typical temperature range of heat supply period, and the effect of thermoelectric elastic operation on the fluctuation of wind power generation is obtained. For the energy supply side of the Internet reform and regional energy planning to provide a reference.
【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】：TM621

【參考文獻】

相關(guān)期刊論文 前10條

1 馮澎湃;王寧玲;楊志平;李曉恩;楊勇平;;直接空冷高背壓供熱機組的梯級供熱特性與冷端變工況協(xié)同優(yōu)化[J];中國電機工程學(xué)報;2016年20期

2 王寧玲;馮澎湃;付鵬;時斌;楊志平;;一種基于分析的火電機組熱力系統(tǒng)性能劣化診斷方法[J];工程熱物理學(xué)報;2016年06期

3 曾鳴;張曉春;王麗華;;以能源互聯(lián)網(wǎng)思維推動能源供給側(cè)改革[J];電力建設(shè);2016年04期

4 曾鳴;楊雍琦;李源非;曾博;程俊;白學(xué)祥;;能源互聯(lián)網(wǎng)背景下新能源電力系統(tǒng)運營模式及關(guān)鍵技術(shù)初探[J];中國電機工程學(xué)報;2016年03期

5 曾鳴;楊雍琦;向紅偉;王麗華;曾博;;兼容需求側(cè)資源的“源-網(wǎng)-荷-儲”協(xié)調(diào)優(yōu)化調(diào)度模型[J];電力自動化設(shè)備;2016年02期

6 鄧慧;白焰;李小繽;黨偉瑋;李欣欣;;直接空冷島順流基管管內(nèi)冷凝的傳熱傳質(zhì)分析[J];中國電機工程學(xué)報;2015年24期

7 王毅;張寧;康重慶;;能源互聯(lián)網(wǎng)中能量樞紐的優(yōu)化規(guī)劃與運行研究綜述及展望[J];中國電機工程學(xué)報;2015年22期

8 劉吉臻;曾德良;田亮;高明明;王瑋;牛玉廣;房方;;新能源電力消納與燃煤電廠彈性運行控制策略[J];中國電機工程學(xué)報;2015年21期

9 陳磊;徐飛;王曉;閔勇;丁茂生;黃鵬;;儲熱提升風(fēng)電消納能力的實施方式及效果分析[J];中國電機工程學(xué)報;2015年17期

10 任洪波;吳瓊;任建興;;基于需求側(cè)視角的天然氣分布式熱電聯(lián)產(chǎn)系統(tǒng)節(jié)能效益研究[J];中國電機工程學(xué)報;2015年17期

相關(guān)博士學(xué)位論文 前2條

1 李沛峰;基于綠色供熱的熱電聯(lián)產(chǎn)低溫直供模式研究[D];華北電力大學(xué);2015年

2 王琪;風(fēng)電規(guī)�；⒕W(wǎng)條件下供熱機組優(yōu)化控制研究[D];華北電力大學(xué);2013年

相關(guān)碩士學(xué)位論文 前6條

1 田嘉;大型熱電聯(lián)產(chǎn)機組余熱梯級利用研究[D];華北電力大學(xué);2015年

2 程楠;直接空冷機組供熱系統(tǒng)的仿真模型研究[D];華北電力大學(xué);2014年

3 邢振中;火力發(fā)電機組深度調(diào)峰技術(shù)研究[D];華北電力大學(xué);2013年

4 賀茂石;熱電聯(lián)產(chǎn)機組電力調(diào)峰運行可行性研究[D];華北電力大學(xué);2012年

5 劉爽;分戶計量供熱系統(tǒng)運行調(diào)節(jié)與室溫控制的研究[D];大連理工大學(xué);2011年

6 楊進才;汽輪機低真空供熱改造設(shè)計及運行分析[D];遼寧工程技術(shù)大學(xué);2006年

，

本文編號：2213698