【摘要】：天然氣分布式能源系統(tǒng)在我國正如火如荼的發(fā)展,其作為一種新型的高效、清潔的能源利用形式,已經(jīng)廣泛應(yīng)用于國內(nèi)的工業(yè)園區(qū)及市內(nèi)建筑中。建立天然氣分布式能源系統(tǒng)高精度的實(shí)時(shí)仿真模型,對(duì)實(shí)現(xiàn)天然氣分布式能源系統(tǒng)的經(jīng)濟(jì)性、安全性的評(píng)估,以及天然氣分布式能源系統(tǒng)運(yùn)行優(yōu)化、控制優(yōu)化的指導(dǎo)具有重要的現(xiàn)實(shí)意義。鑒于此,本文以典型天然氣分布式能源系統(tǒng)機(jī)組設(shè)備為研究對(duì)象,基于Matlab/Simulink仿真平臺(tái),研究天然氣分布式能源系統(tǒng)的動(dòng)靜態(tài)建模仿真。(1)燃?xì)廨啓C(jī)建模算法的改進(jìn)提出一種基于相似原理壓氣機(jī)特性混合建模的方法,即利用壓氣機(jī)通用特性方程確定模型結(jié)構(gòu),利用運(yùn)行數(shù)據(jù)樣本確定模型參數(shù),并據(jù)此建立了LM2500+G4燃?xì)廨啓C(jī)的壓氣機(jī)模型；針對(duì)LM2500+G4燃?xì)廨啓C(jī)的結(jié)構(gòu)特點(diǎn),推導(dǎo)出相應(yīng)的傳熱準(zhǔn)則方程和熱平衡方程,建立了LM2500+G4燃?xì)廨啓C(jī)抽氣冷卻系數(shù)估算模型。仿真結(jié)果表明,修正的壓氣機(jī)特性曲線、建立的抽氣冷卻系數(shù)估算模型提高了LM2500+G4燃?xì)廨啓C(jī)模型的仿真精度。(2)余熱鍋爐建模算法的改進(jìn)基于傳熱學(xué)原理,推導(dǎo)出傳熱系數(shù)的煙氣側(cè)響應(yīng)變工況模型,并考慮了傳熱效率對(duì)熱平衡的影響,從而改進(jìn)了雙壓余熱鍋爐的傳熱方程組；基于兼顧精度與效率的原則,改進(jìn)了傳熱方程組的迭代計(jì)算策略；基于雙壓余熱鍋爐汽包的動(dòng)態(tài)數(shù)學(xué)模型,以保持仿真精度、提高仿真速度為原則,通過優(yōu)化模型的特性參數(shù),解決了求解過程中的代數(shù)環(huán)問題。仿真結(jié)果表明,所建立的雙壓臥式非補(bǔ)燃余熱鍋爐動(dòng)靜態(tài)仿真模型,具有較高的仿真精度,且能夠?qū)崿F(xiàn)實(shí)時(shí)仿真。(3)天然氣分布式能源系統(tǒng)一體化仿真平臺(tái)的設(shè)計(jì)通過將LM2500+G4燃?xì)廨啓C(jī)、雙壓臥式非補(bǔ)燃余熱鍋爐、抽凝式蒸汽輪機(jī)、雙效蒸汽型溴化鋰吸收式制冷機(jī)的動(dòng)靜態(tài)仿真模型依次連接,構(gòu)成天然氣分布式能源系統(tǒng)的動(dòng)靜態(tài)仿真模型；結(jié)合Matlab/GUI,構(gòu)建天然氣分布式能源系統(tǒng)一體化仿真平臺(tái),包含組態(tài)式描述系統(tǒng)組成,參數(shù)適配、人機(jī)交互界面與計(jì)算機(jī)識(shí)別等內(nèi)容。仿真結(jié)果表明,所建立的天然氣分布式能源系統(tǒng)動(dòng)靜態(tài)仿真模型具有較高的仿真精度,并能實(shí)現(xiàn)模型的實(shí)時(shí)仿真；所設(shè)計(jì)的天然氣分布式能源系統(tǒng)一體化仿真平臺(tái)實(shí)現(xiàn)了參數(shù)設(shè)置、仿真結(jié)果輸出、數(shù)據(jù)實(shí)時(shí)分析以及數(shù)據(jù)存儲(chǔ)等功能的一體化結(jié)合。(4)天然氣分布式能源系統(tǒng)運(yùn)行特性的研究以天然氣分布式能源系統(tǒng)靜態(tài)仿真模型為基礎(chǔ),模擬分析了大氣溫度、大氣壓力、燃料熱值等影響因素對(duì)天然氣分布式能源系統(tǒng)運(yùn)行特性的影響規(guī)律。研究結(jié)果表明,大氣溫度、大氣壓力和燃料熱值對(duì)天然氣分布式能源系統(tǒng)聯(lián)合循環(huán)的運(yùn)行出力及效率具有重要的影響；在高溫季節(jié)、高海拔地區(qū)、低品質(zhì)燃料下運(yùn)行天然氣分布式能源系統(tǒng),將大大降低聯(lián)合循環(huán)的出力；為提高聯(lián)合循環(huán)運(yùn)行的經(jīng)濟(jì)性,應(yīng)盡量使聯(lián)合循環(huán)系統(tǒng)保持在低大氣溫度、低海拔以及高品質(zhì)燃料的情況下運(yùn)行。
[Abstract]:Natural gas distributed energy system is developing rapidly in China. As a new type of high efficiency and clean energy utilization form, it has been widely used in industrial parks and urban buildings in China. In view of this, this paper takes the typical natural gas distributed energy system unit equipment as the research object, and studies the dynamic and static modeling and Simulation of the natural gas distributed energy system based on the Matlab/Simulink simulation platform. (1) An improved gas turbine modeling algorithm based on similarity principle is proposed, which uses the compressor general characteristic equation to determine the model structure and the operating data samples to determine the model parameters. According to the characteristics, the corresponding heat transfer criterion equation and heat balance equation are deduced, and the estimation model of exhaust cooling coefficient of LM2500+G4 gas turbine is established. Based on the principle of heat transfer, the variable-condition model of flue gas side response with heat transfer coefficient is deduced, and the influence of heat transfer efficiency on heat balance is considered, so the heat transfer equations of dual-pressure waste heat boiler are improved; the iterative calculation strategy of the heat transfer equations is improved based on the principle of considering both accuracy and efficiency; and the steam drum of dual-pressure waste heat boiler is based on. The algebraic loop problem is solved by optimizing the characteristic parameters of the model. The simulation results show that the dynamic and static simulation model of the dual-pressure horizontal HRSG has high simulation accuracy and can be simulated in real time. The design of integrated simulation platform for gas distributed energy system consists of the dynamic and static simulation models of LM2500+G4 gas turbine, dual pressure horizontal non-supplementary combustion waste heat boiler, condensing steam turbine, double-effect steam LiBr absorption chiller, which are connected in turn to form the dynamic and static simulation model of natural gas distributed energy system. The simulation results show that the dynamic and static simulation model of natural gas distributed energy system has high simulation accuracy and can realize real-time simulation of the model. The integrated simulation platform of the natural gas distributed energy system realizes the integration of parameters setting, simulation results output, real-time data analysis and data storage. (4) The research of the operating characteristics of the natural gas distributed energy system is based on the static simulation model of the natural gas distributed energy system. The results show that atmospheric temperature, atmospheric pressure and fuel calorific value have important effects on the combined cycle output and efficiency of natural gas distributed energy system. In order to improve the economy of combined cycle operation, it is necessary to keep the combined cycle system operating at low atmospheric temperature, low altitude and high quality fuel.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TK01

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉滿平;;我國天然氣分布式能源發(fā)展制約因素及對(duì)策研究[J];中外能源;2014年01期

2 李娜;;天然氣分布式能源系統(tǒng)的發(fā)展[J];電力科技與環(huán)保;2013年04期

3 胡忠文;王忠平;張雪梅;;微燃機(jī)冷熱電聯(lián)供系統(tǒng)(CCHP)的建模及仿真研究[J];能源研究與管理;2010年04期

4 尹洪;任靜;蔣洪德;;燃?xì)廨啓C(jī)燃用中低熱值燃料性能優(yōu)化方案研究[J];工程熱物理學(xué)報(bào);2010年08期

5 劉翠玲;張小東;;分布式能源——中國能源可持續(xù)發(fā)展的有效途徑[J];科技情報(bào)開發(fā)與經(jīng)濟(jì);2009年21期

6 王慶;王培紅;蘭立君;;對(duì)凝汽器傳熱系數(shù)公式修正的研究[J];華東電力;2008年12期

7 侯健敏;周德群;;分布式能源研究綜述[J];沈陽工程學(xué)院學(xué)報(bào)(自然科學(xué)版);2008年04期

8 馬文通;劉永文;蘇明;;基于平均微元級(jí)特性的壓氣機(jī)特性線外推方法[J];動(dòng)力工程;2007年03期

9 張學(xué)鐳;王松嶺;陳海平;周蘭欣;;燃燒中低熱值燃料時(shí)燃?xì)廨啓C(jī)系統(tǒng)的應(yīng)對(duì)方案及其性能分析[J];中國電機(jī)工程學(xué)報(bào);2006年19期

10 魏會(huì)東;吳靜怡;王如竹;皇甫藝;許煜雄;;微型冷熱電聯(lián)供系統(tǒng)的人工神經(jīng)網(wǎng)絡(luò)建模及仿真[J];能源技術(shù);2006年03期

，

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