配置储热后热电机组调峰能力分析

发布时间：2018-12-10 13:24

【摘要】：热电联产机组"以热定电"运行所导致的调峰能力不足是目前造成中国"三北"电网大量弃风的一个重要原因,为此,提出了在中国大型抽汽式热电厂中通过配置储热来提高机组调峰能力的消纳方案。首先介绍了该方案的基本原理;进而对配置储热前、后热电机组的电热运行外特性进行了分析与建模,讨论了配置储热后热电机组的运行策略;在此基础上,建立了计算配置储热后热电机组调峰能力的数学模型,并分析了其影响因素。算例中对中国北方地区2台典型的300 MW和200MW供暖机组配置储热提高调峰能力的效果进行了分析,结果表明:在给定的供热中期的热负荷水平下,配置储热可使得2台机组的调峰容量分别提高额定容量的21%和13%,从而为弃风电力提供大量的上网空间;但储热的效果取决于机组所承担的热负荷水平,若热负荷接近于机组的最大供热能力,则效果并不明显。
[Abstract]:The lack of peak-shaving capacity caused by the operation of cogeneration units "fixed by heat" is an important reason for the heavy abandonment of wind in China's "Sanbei" power grid at present. For this reason, This paper puts forward a scheme to increase the capacity of peak-shaving of generating units by allocating heat storage in large extraction type thermal power plants in China. At first, the basic principle of the scheme is introduced, and then the external characteristics of the electric thermal power unit before and after the heat storage are analyzed and modeled, and the operation strategy of the thermal power unit after the allocation of the heat storage is discussed. On this basis, a mathematical model for calculating the peak-shaving capacity of thermal power units with heat storage is established, and its influencing factors are analyzed. The effect of heat storage of two typical 300 MW and 200MW heating units in northern China to improve peak shaving capacity is analyzed. The results show that under the given heat load level in the middle heating period, The allocation of heat storage can increase the peak load capacity of the two units by 21% and 13% of the rated capacity respectively, thus providing a large amount of network space for the abandoned wind power. However, the effect of heat storage depends on the heat load level of the unit. If the heat load is close to the maximum heating capacity of the unit, the effect is not obvious.
【作者单位】：大连理工大学电气工程学院;中国电力科学研究院;东北电网有限公司;
【基金】：国家自然科学基金资助项目(51107007)~~
【分类号】：TM621

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