电力市场中的水火电优化调度模型及其应用

An Optimum Dispatching Model of Hydro-Thermal Power System in Market Environment and Its Application

分析了水电站如何根据市场需求、价格情况、生产成本函数及利润函数确定其最佳放水率的问题,然后根据水、火电的不同特点并综合考虑电力市场环境下水、火电收益函数和用户需求,以水力、火力发电资源在最经济利用的条件下满足顾客需求为目标建立了水火电优化调度模型,并推导出水火电联合系统最佳经济调度的必要条件,由此求出了一天中各时段的各水电厂最佳放水率(或最佳出力)和各火电厂最佳出力。最后举例说明了该模型在电力市场环境下的水火电优化调度中的应用,并证明了在该环境下通过水火电优化调度实现水电、火电和电网三方“共赢”的可行性。

Here, at first it is analyzed that how to determine the optimum water release rate for hydropower stations according to market demand, price, production cost function and profit function; then in the light of different features of hydraulic and thermal power and comprehensively considering revenue functions of hydro power and thermal power as well as consumers＇ demand in market environment, an optimal dispatching model for hydro-thermal power system is built, in which to meet consumers＇ demand under most economical utilization of hydro- and thermal power resources is taken as objective, and then the necessary condition of optimal dispatching for hydro-thermal power pool is deduced, thus the optimum water release rate （or the optimum output） of each hydropower station in various time intervals of one day and the optimum output of each thermal power plant can be solved. Finally, the applications of the built model in optimal dispatching of hydro-thermal power system in market environment are illustrated, and it is proved that it is possible for hydropower generation, thermal power generation and power grid to gain profit in common in market environment through optimal dispatching hydro-thermal power generation.