共查询到19条相似文献,搜索用时 142 毫秒
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为提高梯级水电站调度运行效益、优化水库水位变化过程、减少弃水,考虑湖北省某流域梯级水电站规划新增混合抽水蓄能电站,将抽水蓄能机组作为水电站发电备用机组或利用其抽水工况实现梯级水电站年发电量的最大化。针对不同来水频率下服从皮尔逊Ⅲ型分布的天然入库,提出逐步优化算法(POA)与水位廊道耦合方法,求解含混合抽水蓄能的梯级水电站调度模型,能有效保证在多约束条件下构建发电量最大的中长期调度规则。算例结果表明,新增混合抽水蓄能电站后不仅可增加本级水电站发电量,还可提高抽水发电转换效率、减少弃水,为梯级水电站规划新增抽水蓄能电站提供参考。 相似文献
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针对差分进化算法在进化过程中适应度的进化模式未考虑进化的外部环境与进化成分间的内在联系问题,结合电力市场环境下梯级水库中长期发电优化调度的特点,借鉴生态学对个体生存环境与种群竞争的关系,提出了协同差分演化算法在电力市场环境下梯级水库中长期发电优化调度中的应用.实例验证结果表明,该算法可靠、合理,计算精度与计算效率高,为求解电力市场环境下高维、复杂的梯级水库中长期发电优化调度模型提供了一种新途径. 相似文献
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提出了求解大规模水电站水库群优化调度非凸结构(NCS)模型的进阶优化算法;给出将不可分调度(NSO)模型所构造的拉格朗回函数转化为可分函数的方法及三级递阶优化算法. 相似文献
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Comparison of particle swarm optimization and dynamic programming for large scale hydro unit load dispatch 总被引:1,自引:0,他引:1
Chun-tian Cheng Sheng-li Liao Zi-Tian Tang Ming-yan Zhao 《Energy Conversion and Management》2009,50(12):3007-3014
Dynamic programming (DP) is one of classic and sophisticated optimization methods that have successfully been applied to solve the problem of hydro unit load dispatch (HULD). However, DP will be faced with the curse of dimensionality with the increase of unit number and installed generating capacity of hydropower station. With the appearance of the huge hydropower station similar to the Three George with 26 generators of 700 MW, it is hard to apply the DP to large scale HULD problem. It is crucial to seek for other optimization techniques in order to improve the operation quality and efficiency. Different with the most of literature about power generation scheduling that focused on the comparisons of novel PSO algorithms with other techniques, the paper will pay emphasis on comparison study of PSO with DP based on a case hydropower station. The objective of study is to seek for an effective and feasible method for the large scale of hydropower station of the current and future in China. This paper first compares the performance of PSO and DP using a sample load curve of the Wujiangdu hydropower plant located in the upper stream of the Yangtze River in China and contained five units with the installed capacity of 1250 MW. Next, the effect of different load interval and unit number on the optimal results and efficiency of two methods has also been implemented. The comparison results show that the PSO is feasible for HULD. Furthermore, we simulated the effect of the magnitude of unit number and load capacity on the optimal results and cost time. The simulation comparisons show that PSO has a great advantage over DP in the efficiency and will be one of effective methods for HULD problem of huge hydropower stations. 相似文献
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鉴于梯级水电站优化运行的高复杂度、强非线性、多约束等特点,构建了基于峰谷分时电价下的梯级水电站日最大发电效益模型。针对遗传算法(GA)等传统智能算法对复杂模型求解易陷入局部最优的问题,提出一种水循环算法(WCA)与水位廊道约束耦合、降低约束复杂度、规范寻优空间的方法,并以湖北某梯级短期优化调度为背景进行建模仿真,将计算结果分别与GA和粒子群算法(PSO)所得结果进行比较。实例研究表明,WCA计算的总效益在丰、平、枯典型日分别比GA和PSO计算值约高5.65%、3.15%、0.80%,迭代收敛速度更快,求解能力更强,为解决梯级水电站优化调度问题提供了新思路。 相似文献
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偏差考核现已成为电力市场交易的常规环节,发电企业若不处理好相关问题、合理调度运行,将影响其市场收益,不利于企业的健康持续发展,进而对电力市场的健全发展造成一定影响。因此,为给企业合理应对偏差考核提供参考,首先对偏差电量考核规则进行概述,建立了计及偏差考核的电站收益模型,随后考虑梯级各电站间水力联系,基于单站运行约束条件,构建了基于偏差考核的梯级水电调度模型,并以四川省某流域梯级共8级电站为例,利用逐步优化算法进行计算。结果表明,梯级各站各考核时段电量偏差率介于-0.799%~0.558%之间,均免受偏差考核。 相似文献
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水库优化调度是水能高效利用,提高电站经济效益的有效措施。如何增发电量促进经济效益最大化已成为龙首一、二级水电站亟待解决的问题。文中从管理体制方面入手,研究班电量考核制度下的水电站水库优化调度,结果表明班电量考核制度在拦蓄洪水、提高水情预报准确率、增发电量上有显著的作用,为提高水电站运行和综合管理水平提供依据,为以后水电站水库优化调度工作提供新思路新方法。 相似文献