考虑多因素协调的梯级水电站群调度策略研究

本文提出了一种计及多种因素间协调的梯级水电站群调度策略,以兼顾梯级水电站群的经济效益和社会效益。首先引入发电弃水量、抗旱放水量、以及泄洪水量等参数,用以完善梯级水电站数学模型;提出采用虚拟水库来表征流域分布泄洪点及抗旱灌溉点,并建立相应的数学描述;考虑梯级水电站水力调度,火电站的发电机组出力、能耗成本及污染排放三者之间,梯级电站的出力、发电流量、发电弃水量、防洪水量、抗旱水量与其它水力耦合参数之间,以及水火电机组联合调度之间综合效益基础上,建立了多目标综合节能调度模型;算例验证了该算法的可行性,并具有较为明显的节能效果和社会效益。

Study on Power Generation Dispatch of Hydropower Plants Based on the Coordination with Multi-factors

Optimal operation of cascade hydropower plants can make full use of water resources and maximize the benefit of power generation, energy-saving benefit between hydro and thermal power, and social benefit of flood-drought control. Therefore, this paper proposes a scheduling strategy for cascade hydropower plants considering the coordination of a variety of factors, taking into accounts both the economic and social benefit. The spill water is decomposed into three parts: power generation spill, flood control spill and anti-drought spill. The concept of virtual power plant is introduced to represent the site of flood control spill, and its mathematic expression is put forward. The comprehensive benefits of hydro and thermal power is considered, including the coordination of water scheduling, power output and energy cost and pollution emission of thermal plants, the coordination of power outputs of hydro plants, water flow of electric generation, power generation spill, flood control spill, anti-drought spill and other water power parameters. So an energy saving scheduling model is proposed with multi-objects of minimum water spill, minimum energy cost and pollution emission of thermal plants. Finally, the proposed method is simulated on a system consisted of 4 cascade hydro power plants and 3 thermal power plants for three cases: normal, flood control and anti-drought. The results verified the feasibility of the proposed method with its energy saving and social benefit.