发电厂空冷机组负荷优化调度控制仿真

摘要

This research focuses on the method for optimization scheduling of load of air-cooled unit in power station based on dynamic programming.In the research,we put forward the concept of total time of scheduling,then obtained characteristic equation of coal consumption of electricity supply in scheduling cycle and built model for load scheduling of air-cooled unit of load adjustment time.The research disposed target of load adjustment time as constraint condition of load range,and used theory of dynamic programming with variable step size to carry out optimization scheduling of load for each air-cooled unit.Experimental results show that the method can meet the requirement of load optimization scheduling and has higher control precision.%对发电厂空冷机组的负荷优化调度,可以保证空冷机组对电网负荷变化的响应.对空冷机组负荷调度进行优化,需要先寻找负荷调整时间目标,并将其处理为负荷范围的约束条件,完成对空冷机组的负荷优化调度.传统方法组建空冷机组发电功率预测模型,从而求解网损最小为目标函数,但忽略了负荷范围的约束条件的处理,导致负荷调度精度偏低.提出基于动态规划的发电厂空冷机组负荷优化调度方法.提出发电厂空冷机组负荷调度总时间的概念,得到调度周期内空冷机组供电煤耗量特性方程,并组建负荷调整时间的发电厂空冷机组负荷调度模型,将负荷调整时间目标处理为负荷范围的约束条件,并利用变步长动态规划理论对各空冷机组进行负荷的优化调度,由此实现发电厂空冷机组负荷优化调度.实验结果表明,所提方法能够达到发电厂空冷机组负荷优化调度要求,且控制精度较高.