计及市场收益的含储能火电厂日前-日内两阶段优化调度方法

Day-ahead and intraday two-stage optimal dispatch model of a thermal power plant with energy storage and taking into account the profit

火电厂的市场收益主要包括电能收益与备用收益,机组容量的分配是影响市场收益的重要因素之一,因此提出考虑优化机组容量分配的日前-日内两阶段优化调度方法。分析储能参与电力调度的机理,量化储能可用备用容量,以减小机组爬坡频次、提高机组发电利用率为目标,建立含储能火电厂日前与日内两阶段优化调度模型。采用拉格朗日松弛法对模型进行处理,基于市场边际电价理论求解容量价格与电量价格,并计算火电厂总售电收益。在安装储能与否的两种场景中进行算例分析,结果表明,在火电厂侧安装储能可以有效提高机组发电利用率,增加火电厂收益。

The total profit of a thermal power plant mainly include electricity and reserve profit.The allocation of unit capacity is one of the important factors affecting the total profit.Thus a day-ahead and intraday two-stage optimal dispatch model to optimize the capacity is proposed.The participation mechanism of Energy Storage(ES)in power dispatching is analyzed and the available reserve capacity of ES is quantified.Then a day-ahead and intraday two-stage optimal dispatch model of a thermal power plant with ES is established to reduce the climbing frequency of units and improve the utilization rate of its generation.The model is processed by Lagrange relaxation,and the capacity and electric energy price and the total profit of power plants are calculated based on the marginal price theory.The model is tested in two scenarios:where ES is installed or not.The results show that the installation of ES at a power plant can improve the utilization rate and the profit of generating units.