本文選題：超臨界機組 + 熱經(jīng)濟性��； 參考：《華北電力大學》2014年碩士論文

【摘要】：在國家提出“節(jié)能減排”政策和頒布新修訂的GB13223-2011《火電廠大氣污染物排放標準》這一排放標準異常嚴格的背景下,在現(xiàn)有相當高效的超臨界發(fā)電機組能耗和排放水平上,結(jié)合電網(wǎng)的負荷變化和電廠熱力設(shè)備的實際運行狀況,找出其中節(jié)能降耗潛力較大的部分進行全面深入的分析研究,得到機組熱經(jīng)濟性最優(yōu)的運行方式和運行參數(shù)基準值,從而達到節(jié)能的目的,并從另一方面也為減少污染物排放量和滿足新的污染物排放標準做出一份貢獻。本文以目前已成為國內(nèi)火力發(fā)電主力的600MW超臨界凝汽式濕冷機組為目標電廠,在充分研究汽輪機側(cè)的熱力系統(tǒng)變工況特性基礎(chǔ)上,建立其變工況的物理模型和數(shù)學模型,以汽輪機負荷、大氣條件為原始變量計算得出熱力系統(tǒng)在機組變工況時某一工況的重要熱力參數(shù)。將已知的熱力參數(shù)代入汽輪發(fā)電機組特定的熱耗率計算模型,利用MATLAB的優(yōu)化程序,計算出在汽輪機不同運行方式下,汽輪發(fā)電機組特定熱耗率最低時的最優(yōu)運行參數(shù),經(jīng)過對理論上無限多個的工況點進行比較,得出某一工況下機組最佳的運行方式和運行參數(shù),然后通過曲線擬合,得到在不同的汽輪機負荷和典型季節(jié)的大氣參數(shù)條件下汽輪機發(fā)電機組的最優(yōu)運行方式。
[Abstract]:Under the background of the "energy saving and emission reduction" policy proposed by the state and the promulgation of the newly revised GB13223-2011 Emission Standard for Atmospheric pollutants in Thermal Power plants, under the background of unusually strict emission standards, the energy consumption and emission level of the existing supercritical generating units are quite efficient. Combined with the load change of the power network and the actual operation condition of the thermal equipment in the power plant, we find out the part with great potential for energy saving and consumption reduction for comprehensive and in-depth analysis and study, and obtain the optimal operation mode and the operating parameter reference value of the unit thermal economy. In order to achieve the purpose of energy conservation, and on the other hand, to reduce the emissions of pollutants and meet the new emission standards of pollutants to make a contribution. In this paper, the 600MW supercritical condensing type wet cooling unit, which has become the main force of domestic thermal power generation at present, is taken as the target power plant. On the basis of fully studying the characteristics of the thermodynamic system on the steam turbine side, the physical and mathematical models of the variable working condition are established. Taking turbine load and atmospheric condition as original variables, the important thermodynamic parameters of the thermodynamic system under a certain working condition are obtained. The known thermodynamic parameters are substituted into the specific heat consumption rate calculation model of the turbine generator set, and the optimal operating parameters of the turbine generator set with the lowest specific heat consumption rate under different operation modes of the turbine are calculated by using the optimization program of MATLAB. Through the comparison of infinite number of operating points in theory, the optimal operation mode and operating parameters of the unit under a certain working condition are obtained, and then the curve fitting is carried out. The optimal operation mode of steam turbine generator is obtained under the conditions of different turbine loads and atmospheric parameters of typical seasons.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM621

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