中文摘要：

在电力系统经济调度中,由于不确定性呈现多元化特征,即决策量和被决策量都存在不确定性,这给调度中备用的决策带来困难。对此,在对备用特性、功效深入分析的前提下,提出一种使备用配置更有效的经济调度方法。该方法的核心体现在：结合主动量与被动量的概念,依据其不确定性的特性,分别设置备用,并以期望能量得不到应用为指标表达备用的效用。在此基础上,以主动量为纯火电机组和被动量为负荷及可再生能源发电,推演对应主动量与被动量配置备用效用以及备用边际效用的解析表达,从而构成主动量与被动量的等备用边际效用的新约束条件,促进电力系统经济调度模型的发展。以此为基础,建立主动量与被动量等备用边际效用约束下的经济调度模型,并给出求解方法,该方法可实现主动量与被动量备用的最优匹配。最后,结合78机系统算例分析,验证所提方法的正确性和有效性。

英文摘要：

Uncertainties in both decision variable and decided variable make economic dispatch of power system have the characteristic of diversification and result in difficulty in scheduling reserve capacity, In order to address the issue, this paper proposed an economic dispatching method to make the scheduled reserve be more efficient after analyzing the characteristics and the effects of reserve deeply. Based on the concepts of active variable and passive variable and taking expected energy not supplied （EENS） as the reserve＇s utility, this method scheduled active variable＇s reserve and passive variable＇s reserve respectively according to the basis of their uncertainty characteristics. The thermal generator was taken as active variable, load and the renewable generator as passive variable, analytical expressions of the reserve utility and the marginal reserve utility were deduced to constitute a new constraint which equals active variable＇s marginal reserve utility and passive variable＇s marginal reserve utility. The method is a new progress in economic dispatching modeling of power system. Also, an economic dispatching model was proposed under the constraint that active variable＇s marginal reserve utility and passive variable＇s marginal reserve utility were equal, and the solving method which realizes the best-matching between active variable＇s reserve and passive variable＇s reserve was given. At last, the correctness and effectiveness was verified by simulations on 78-unit system.