本文關(guān)鍵詞： 儲熱 風(fēng)電消納 調(diào)峰 電熱綜合調(diào)度 運行策略　出處：《大連理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：當(dāng)前,在我國“三北”地區(qū)冬季供暖期,因“風(fēng)熱沖突”所導(dǎo)致的棄風(fēng)現(xiàn)象越來越嚴(yán)重,已經(jīng)成為全社會關(guān)注的問題。沖突的原因在于熱電聯(lián)產(chǎn)機組為保證供熱而不得不大幅提高其最小出力,進(jìn)而導(dǎo)致風(fēng)電的上網(wǎng)空間不足。為此,本文提出了在我國熱電廠中通過配置儲熱裝置來降低棄風(fēng)時段最小出力,進(jìn)而消納風(fēng)電的方案。論文的主要工作內(nèi)容及成果如下： 首先,為驗證方案的技術(shù)可行性,分析了我國抽汽式機組配置儲熱后的調(diào)峰能力。首先,對配置儲熱后熱電機組的電熱運行外特性進(jìn)行了建模；進(jìn)而,討論了其運行策略；在此基礎(chǔ)上,建立了計算配置儲熱后熱電機組調(diào)峰容量的數(shù)學(xué)模型；最后,利用該模型對我國北方地區(qū)典型的300MW和200MW供熱機組配置儲熱提高調(diào)峰能力的效果進(jìn)行分析,結(jié)果表明：在給定的供熱中期熱負(fù)荷水平下,配置儲熱可使得2臺機組的調(diào)峰容量分別提高額定容量的21%和13%,從而為棄風(fēng)電力提供大量的上網(wǎng)空間。 然后,為適應(yīng)我國集中調(diào)度的電力運營環(huán)境,建立了含儲熱的電力系統(tǒng)電熱綜合調(diào)度模型。與傳統(tǒng)模型相比,新模型增加了系統(tǒng)熱平衡約束、熱電機組的熱電耦合約束、儲熱裝置運行約束等；目標(biāo)函數(shù)擴展為供電和供熱總煤耗最低。算例對模型的有效性進(jìn)行了驗證,并表明,在熱電廠中配置儲熱可有效提高電網(wǎng)的風(fēng)電消納水平,且消納單位電量風(fēng)電的節(jié)煤量要高于電鍋爐消納方案。 最后,為制定考慮風(fēng)電不確定性的蓄熱罐運行策略,建立了基于場景分析的含儲熱優(yōu)化調(diào)度模型,利用場景分析方法描述風(fēng)電的不確定性,以各場景下系統(tǒng)煤耗量的期望值作為目標(biāo)函數(shù)；鑒于模型的復(fù)雜性,為簡化計算,提出一種實用化方法,該方法對不同場景分別進(jìn)行電熱綜合調(diào)度確定備選的運行策略,然后建立“節(jié)煤量”指標(biāo)對各策略進(jìn)行評價,最后選擇“節(jié)煤量”最大的策略作為蓄熱罐的次日運行策略；算例對以上兩種方法的有效性進(jìn)行驗證,并表明,實用化方法與基于場景的優(yōu)化調(diào)度所得到的結(jié)果基本相同。 上述研究表明,在我國熱電廠中配置儲熱是促進(jìn)風(fēng)電、熱電友好協(xié)調(diào)發(fā)展的有效手段,可有效緩解當(dāng)前“風(fēng)熱沖突”問題,為我國解決棄風(fēng)問題提供了一種可行方案。
[Abstract]:At present, during the winter heating period in the "three north" areas of China, the phenomenon of abandoning the wind caused by the "wind-heat conflict" is becoming more and more serious. It has become a problem of concern to the whole society. The reason for the conflict lies in the fact that cogeneration units have to greatly improve their minimum capacity to ensure heat supply, which in turn leads to a lack of space for wind power to connect to the Internet. In this paper, a scheme is proposed to reduce the minimum output force of abandoned air period and then absorb wind power by installing heat storage device in the thermal power plant of our country. The main contents and results of this paper are as follows:. First of all, in order to verify the technical feasibility of the scheme, the peak shaving capacity of the steam extraction unit after heat storage is analyzed. Firstly, the external characteristics of the thermal power unit with heat storage are modeled, and the operation strategy is discussed. On this basis, a mathematical model for calculating the peak capacity of thermal power units with heat storage is established, and finally, the effect of heat storage on the peak shaving capacity of typical 300MW and 200MW heating units in northern China is analyzed. The results show that under a given heat load level in the medium term, the peak load of two units can be increased by 21% and 13, respectively, which provides a large amount of network space for the abandoned wind power. Then, in order to adapt to the electric power operation environment of centralized dispatching in our country, the electric heat comprehensive dispatching model of power system with heat storage is established. Compared with the traditional model, the new model adds the system heat balance constraint and the thermoelectric coupling constraint of the thermoelectric unit. The objective function is extended to the lowest total coal consumption of power supply and heating. The validity of the model is verified by an example, and it is shown that the allocation of heat storage in the thermal power plant can effectively improve the wind power consumption level of the power network. The coal consumption per unit charge of wind power is higher than that of electric boiler. Finally, in order to make the operation strategy of storage tank considering the uncertainty of wind power, the optimal scheduling model with heat storage based on scenario analysis is established, and the uncertainty of wind power is described by scenario analysis method. In view of the complexity of the model and the complexity of the model, a practical method is proposed, which determines the alternative operation strategy for the different scenarios, which is based on the expected value of the coal consumption of the system under different scenarios, and in view of the complexity of the model, in order to simplify the calculation, a practical method is proposed. Then the index of "saving coal" is established to evaluate the strategies, and the strategy of "saving coal" is chosen as the next day operation strategy of the storage tank. The effectiveness of the above two methods is verified by an example, and the results show that, The practical method is basically the same as the optimal scheduling based on scenario. The above research shows that the allocation of heat storage in the thermal power plants in China is an effective means to promote the friendly and coordinated development of wind power and thermal power, which can effectively alleviate the current "wind and heat conflicts" and provide a feasible scheme for solving the problem of abandonment of wind in our country.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM621

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