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随着电力工业改革的进行,厂网分开已经实现,此时电网公司的目标是追求企业发展和实现企业价值最大化,因此对电网公司的购电策略进行研究是非常必要的。本文研究电网公司在发电侧已经开放且采用单一购买者模式的电力市场条件下的最优购电方案,建立了电网公司在长期合约市场的购电模型,分析了发电商的机组发电报价曲线和备用容量报价曲线。根据合约市场中的购电量以及对机组发电报价和备用容量报价的分析,本文建立了市场清算价格由机组报价形成的短期现货市场中电网公司的购电优化模型,其目标函数是使购买电能和备用的总费用最小,约束条件需考虑用户的需求以及系统的安全稳定运行。
With the reform of the electric power industry, the separation of plant and network has been realized. At this time, the goal of the power grid company is to pursue the development of the enterprise and maximize the enterprise value. Therefore, it is necessary to study the purchase strategy of the grid company. This paper studies the power grid company’s optimal purchase plan under the electricity market conditions that the power generation side is open and adopts a single purchaser model, establishes the grid company’s purchase model in the long-term contract market, analyzes the generation quotations curve and Spare Capacity Quote Curve. According to the purchase quantity in the contract market and the price quotation of generator generating and reserve capacity, this paper establishes the power purchase optimization model of the grid company in the short-term spot market formed by quotation of the unit, whose objective function is to make the purchase of electric energy and The minimum total cost of backup, constraints need to consider the needs of users and the system safe and stable operation.