摘要
针对大型水电站厂内经济运行问题的高维性、复杂非线性和实时性,将空间负荷优化分配模型与时间机组组合优化模型相耦合为整体时空经济运行模型,提出一种扩展蚁群算法.采用多蚁群、多起点、多路径模式进行机组组合优化,依据动态规划法制定的稳定最优表进行经济负荷分配,避开空蚀振动区.引入信息素平滑机制避免优化算法的收敛早熟,采用启发式开停机策略和备用容量补充策略有效处理多重约束,运用全程开停机策略在大型水电站机组台数较多的情况下缩小搜索空间的大小,使算法更快收敛于最优解.以三峡水电站为应用实例对算法的可行性进行了验证,计算结果表明所提出的算法模型不仅具有较强的收敛性和稳定性,而且能够兼顾计算速度和优化精度.
For the high dimension ,complex nonlinear and instantaneity characteristic of inner‐plant economical operation problem of large hydropower station ,spatial optimal load distribution model and temporal unit commitment model was combined into an overall temporal and spatial economic opera‐tion model ,and an extended ant colony optimization was proposed .It adopted a mode with multiple ant colonies ,multiple outsets and multiple routes to solve the problem of unite commitment （UC） and stable optimal table which was formulated according to the dynamic programming method be used to conduct the economic load distribution （ELD ） and avoid cavitation vibration unit area . Pheromone smoothing mechanism was introduced to effectively avoid premature ,as well as the heuristic strategy of up/down units and the reserve capacity supplement strategy to handle multiple constraints .An en‐tire up/down unit strategy against the condition when there were many units in large‐scale hydropower station could greatly reduce the search space so that it could convergence to the optimal solution fas‐ter .Take the Three Gorges Hydroelectric plant as application example ,results show that the pro‐posed method has better convergence ,stability as well as faster computing speed and better optimized accuracy .
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第9期117-122,共6页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家重点基础研究发展计划资助项目(2012CB417006)
国家科技支撑计划资助项目(2009BAC56B03)
关键词
水电站
厂内经济运行
扩展蚁群算法
机组组合
负荷分配
稳定最优表
hydropower station
inner-plant economical operation
extended ant colony optimization
unit commitment
load distribution
stable optimal table
