基于分支限界法的火电机组负荷分配研究

RESEARCH ON LOAD DISTRIBUTION OF THERMAL POWER UNIT BASED ON BRANCH-BOUND METHOD

针对大规模新能源并网调峰问题,提出不同调峰阶段火电机组负荷分配方法:分析火电机组调峰能力、调峰成本及二者之间的关系;以总煤耗成本、机组启停成本之和最小为目标,建立不同调峰阶段火电机组负荷分配优化模型;根据火电机组爬坡率、滑坡率,提出参与负荷分配机组的组合策略,并使用分支限界法对负荷分配优化模型求解。算例表明,随着火电机组调峰深度的增加,机组煤耗成本和启停成本减少,深度调峰运行下附加煤耗成本和机组损耗成本增加。

Aiming at the peak load regulation problem of large-scale new energy grid-connected,a load distribution methods for thermal power units in different peak load regulation stages is proposed.The capacity and cost of peak load regulation of thermal power units are analyzed and the relationship between they is studied.With the goal of minimizing the total cost of coal consumption and the unit startstop costs,an optimization model for load distribution of thermal power units in different peak load regulation stages is established.According to the ramp rate and landslide rate of thermal power units,a combination strategy of units participating in load distribution is proposed,and the branch-bound method is used to solve the load distribution optimization model.The example shows that as the peak load regulation depth of thermal power units increases,unit coal consumption cost and start-stop cost will decrease,and additional coal consumption cost and unit loss costs under deep peak load regulation will increase.