基于火电机组分级深度调峰的电力系统经济调度及效益分析

发布时间：2018-03-25 21:06

本文选题：深度调峰　切入点：分级调峰　出处：《电网技术》2017年07期

【摘要】：以风电规模化并网为背景,分析了我国现有火电机组的深度调峰能力,借鉴Manson-Coffin公式,给出了变负荷调峰下的机组损耗成本计算方法,建立了火电机组全过程调峰成本的分段函数;在全额接纳风电的基础上,以调度周期内火电机组总发电成本最小为目标,建立了基于分级深度调峰的电力系统经济调度模型。以某实际电网为研究对象,给出了不同调度策略下仿真结果,进而分析了基于等效替代的火电机组深度调峰效益。结果表明,对于算例系统,适当提高部分机组的调峰深度至额定容量的55%,可以提高整个系统的调峰效益;但是随着调峰深度的进一步增加,整个系统的火电机组深度调峰效益逐渐减小,在调峰深度大于额定容量的65%以后,深度调峰效益低于基本调峰。在规模化风电并网背景下,研究结果对制定相关火电机组参与深度调峰辅助服务的效益分析提供理论参考。
[Abstract]:Under the background of large-scale wind power grid connection, this paper analyzes the depth peak-shaving capacity of existing thermal power units in China, uses Manson-Coffin formula for reference, and gives the calculation method of unit loss cost under variable load peak-shaving. The piecewise function of peak-shaving cost in the whole process of thermal power unit is established, and on the basis of full acceptance of wind power, the goal is to minimize the total generation cost of thermal power unit during the dispatching period. The economic dispatching model of power system based on hierarchical depth peak-shaving is established. The results show that the peak shaving efficiency of the whole system can be improved by properly increasing the peak-shaving depth to the rated capacity of some units. However, with the further increase of peak-shaving depth, the deep peak-shaving benefit of the whole system decreases gradually. After the peak-shaving depth is more than 65% of the rated capacity, the deep peak-shaving benefit is lower than that of the basic peak-shaving. The results provide a theoretical reference for the benefit analysis of the related thermal power units participating in the auxiliary service of deep peak-shaving.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);
【基金】：能源基金会(美国)项目(G-1403-20188) 国家自然科学基金重大项目(51190103)~~
【分类号】：TM73

【相似文献】