基于“三公”调度的年度滚动发电计划与机组组合优化模型

Annual rolling generation scheduling and unit commitment optimization model based on open and impartial dispatching

"三公"调度是我国目前普遍采用的调度模式。负荷预测及水电计划是火电发电计划编制的基础,一般具有时间越近、精度越高的特点,实际应用中一般通过滚动预测及修正以提高发电计划的可用性。基于"三公"调度提出了年度滚动发电计划与机组组合优化模型,在优先保障"三公"调度目标的同时,优化机组的启停计划,提高火电机组的平均负荷率,并减少机组启停次数,以提高电网运行的经济性。所提模型为混合整数线性规划问题,能够采用CPLEX等商业软件求解。广西电网的仿真分析验证了所提模型的正确性及有效性。

Open and impartial dispatching is widely used in China at present. Load forecast and hydropower schedule are the foundation of thermal power generation scheduling, and are generally more precise when the forecast time is more recent. To improve the availability of power generation schedule, rolling prediction and correction are usually used in practical applications. An annual rolling power generation schedule and unit commitment optimization model based on open and impartial dispatching is proposed. The primary goal of proposed model is to meet the need of open and impartial dispatching. At the same time, the model can reduce the start-stop times of thermal generation units and improve the average load rate of thermal generation units so as to improve the economy of power grid operation. The proposed model is a mixed integer linear programming problem, and can be solved by optimization tools, such as CPLEX. The correctness and effectiveness of the proposed model is verified by the simulation results of Guangxi power grid.