电力市场环境下最优备用容量的确定

传统确定备用容量的方法已经不适用于电力市场环境。文中提出一种确定最优备用容量的算法,根据经济学中的效用(文中指电网安全效用)无差异理论,引入可中断负荷替代一部分备用容量,利用存储理论概念建立确定最优备用容量的数学模型,结合历史数据资料中备用容量利用的概率,运用决策论的算法求解最优备用容量。结合四川电网备用辅助服务的研究结果表明,在电网安全性不变的前提下,最优备用容量经济性明显优于用传统方法确定的备用容量。该算法符合市场规律,简单、实用。

Determination of Optimal Reserve Capacity in Electricity Market Environment

The traditional method of the reserve capacity determination is unfit for electricity market environment. The optimization method for determining reserve capacity is proposed, in which the compensating mechanism for interruptible load is introduced according to the effect theory in economics. In the mechanism, the interruptible load substitutes some reserve capacity on condition that ensuring the effect (herein the effect is the system stability effect) invariable, where the mathematical model of optimal reserve capacity is established based on storage theory. The optimal reserve capacity is thus resolved with the algorithm of decision theory, and the probability of reserve capacity in historical data is used. The research results of Sichuan power grid show that the optimal reserve capacity calculated by the method is obviously better in economy than that determined by the traditional method. The method is reasonable, novel, applicable and accordant to market rules.