基于不同优化算法的厂级负荷分配研究

Study on Plant-level Power Dispatch Based on Various Optimal Algorithms

提高机组的经济性,降低成本,是火电厂实行"竞价上网"所面临的迫切任务,所以在电厂各发电机组间实行机组负荷优化分配,提高运行效率,降低生产成本意义重大。本文根据现场机组煤耗数据采用多项式拟合的方法求取了机组煤耗特性曲线二次关系式,建立了负荷优化分配模型,考虑了机组优化分配问题中的各种约束条件,进而利用MATLAB优化工具箱对算例进行优化运算。最后将基于动态规划法与等微增率法的两种负荷优化分配方案进行了分析比较,指出了两种方案的优缺点与适用条件。

The fossil-fired power enterprises are confronted with the extreme condition that economy enhancement and cost reduction has been recognized as one of the important issues. It has meaningful sense of optimization on power load distribution among every power units. In this study, the quadric equation of fuel cost for the employed unit were obtained according to the curve fitting method. The power load distribution model is further developed based on a series of constraints, and the optimal calculations are achieved by ATLAB software. Finally, the advantages and drawbacks of the two methods are pointed out by comparing and analyzing the dynamic programming and the equal increments method for load distribution scheme.