基于动态成本理论的水电厂发电成本分析

The Hydropower Generation Cost Analysis Based on Dynamic Cost Theory

应用成本分摊理论将固定成本按水电厂出力分摊,结合变动成本求出动态成本。以汉江流域某新建水电厂为例的研究分析表明,水电厂的边际成本和会计成本不随系统负荷的变化而变化,是迟滞的。动态成本随着系统负荷的增加而增加,其在反映市场供需关系对电价的影响方面优于会计成本和边际成本。本研究对指导电力市场环境下水电厂的优化运行和竞价上网具有重要意义。

In order to study the dynamic costs of hydropower generation,the cost-sharing theory is used to share the fixed costs in terms of hydropower output by the hydropower plant,and to combine with the variable costs to calculate the dynamic costs.The research and analysis results with some newly-built hydropower plant in the Hanjiang river valley as an example indicate that the marginal cost and accounting cost of the hydropower plant can not vary with the variation in the system loading,is in stagnation,but the dynamic cost increases with an increase in the system loading,whose reflection of the effect of market supply and demand relationship upon electric price is superior to the accounting cost and the marginal cost.Accordingly,this research is of great significance in the hydropower plant optimal operation and price bidding in the power grid under the environment of electricity market.