联合循环热电联产机组变工况性能分析

发布时间：2018-05-18 21:29

本文选题：联合循环 + 燃气轮机　；参考：《中国电机工程学报》2017年12期

【摘要】：随着天然气在中国能源结构中的比例不断上升,以燃气轮机为基础的联合循环热电联产技术将获广泛应用。以压气机的逐级叠加法和透平的分段冷却模型为基础,结合传统三压余热锅炉模型,提出了从中压缸排汽抽汽供热的方式,建立了联合循环热电联产系统。研究了不同抽汽系数下,系统各种效率和指标,如发电功率、总能利用系数和热电比等,随燃气轮机负荷的变化情况;不同进气可调导叶(inlet guide vane,IGV)开度下,上述效率和指标随抽汽系数变化情况;并提出了最大和最小抽汽限制曲线,得出了机组可运行区间。以MPCP1-M701F机组为对象,研究表明:随燃气轮机负荷的减小,各效率值逐渐减小,且速度逐渐加快,联合循环功率和供热量逐渐变小,基本呈线性关系,热电比逐渐变大,且速度逐渐加快;随着抽汽系数的增大,各效率值逐渐增大,除了电效率速度逐渐加快,其他基本呈线性关系,联合循环功率逐渐变小,供热量逐渐变大,两者基本呈线性关系,热电比逐渐变大,且速度逐渐加快。
[Abstract]:With the increasing proportion of natural gas in China's energy structure, combined cycle cogeneration technology based on gas turbine will be widely used. Based on the stepwise superposition method of compressor and the piecewise cooling model of turbine, combined with the traditional model of three pressure waste heat boiler, the way of extracting steam from medium pressure cylinder for heat supply was put forward, and the combined generation system of combined cycle heat and power was established. The variation of system efficiency and index, such as generation power, total energy utilization coefficient and thermoelectric ratio with gas turbine load under different extraction coefficients, and different inlet air adjustable guide vane guide vaneIGV open degree are studied. The efficiency and index vary with the extraction coefficient, and the maximum and minimum extraction limit curves are proposed, and the operational interval of the unit is obtained. Taking the MPCP1-M701F unit as the object, the research shows that with the decrease of the gas turbine load, the efficiency value decreases gradually, and the speed is gradually accelerated, the combined cycle power and heat supply gradually become smaller, the basic linear relationship, and the ratio of heat and electricity increases gradually. With the increase of the extraction coefficient, the efficiency values gradually increased, except for the electric efficiency speed, the other basic linear relationship, the combined cycle power gradually decreased, the heat supply gradually increased, The relationship between them is linear, the thermoelectric ratio is increasing and the speed is speeding up.
【作者单位】：广东省能源高效清洁利用重点实验室(华南理工大学);
【分类号】：TM621

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