火电机组日前节能发电调度机组组合

摘要

机组组合是制定日前节能发电调度计划的重要内容,包括确定机组启停状态和经济负荷分配两方面,对此提出了制定火电机组组合的两种实现方法--分步优化和联合优化.前者基于机组排序表确定机组启停状态后再进行经济负荷分配;后者直接建立以能耗最小为目标、考虑多种约束的日前节能发电调度机组组合模型,采用启发式动态规划结合等微增率的混合算法进行联合优化求解.实际算例对比分析表明,联合优化方法是制定机组组合更为精确方法.%Unit commitment which contains determination of unit states and economic load dispatch is of great importance for daily energy-saving generation dispatching. Step optimization and joint optimization are put forward to solve this problem. The former determines unit commitment based on unit order and then performs load dispatch; The latter directly establishes daily Scheduling model to minimize energy consumption considering multi-constraints, and the mixed-algorithms composed of dynamic programming and equal incremental rate are used to solve this model. Finally, with comparison analysis of a example, it is proved that joint optimization is a more precise way to schedule unit commitment.