为解决并网风电系统的调峰难题,减少弃风,增加电网消纳风电容量,采用抽水蓄能系统(pumped hydro system,PHS)储存弃风.从系统中各电源的特性出发,构建了含风力-抽蓄发电的电力系统数学模型,在满足系统需求和各类电源的技术特性下,以整个系统的运行成本最小为目标函数,采用实数编码的遗传算法进行仿真计算.结果表明:采用PHS不但能够减少弃风,而且在弃风时PHS获得的经济效益较没有弃风时获得的经济效益更好.综合各影响因素和评价指标的分析,得出了PHS在系统中的最优容量,对更好地利用风电及优化资源配置有一定指导意义.
In order to solve peaking difficulties of wind power system, reduce the abandoned wind power and improve the utilization of wind power, this paper used pumped hydro system (PHS) to store abandoned wind. Based on the characteristics of power supply, this paper built a mathematical model of power system with wind and pumped storage power generation, in which the minimum operation cost of the system was taken as the objective function, and the genetic algorithm with real coding was used for simulation calculation, under the condition of meeting the system requirements and technical characteristics of all kinds of power supply. The results show that the PHS can reduce the abandoned wind, and the economic benefit of abandoned wind storage is better than that of without wind abandoned. Finally, through the comprehensive analysis on influence factors and evaluation indexes, the optimal capacity of PHS was obtained, which had certain guiding significance to the better use of wind power and the optimization of resource allocation.