共查询到19条相似文献,搜索用时 156 毫秒
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阐述了人工神经网络的基本原理,提出了建立水库优化调度函数的BP网络模型。分别利用该算法与传统的多元回归建立金盆水库优化调度函数,结果表明,BP网络模型计算简便,并具有较高的计算精度。 相似文献
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针对乌溪江梯级水电站的特点,充分利用水库优化调度技术,采用隐随机方法分别拟合了该梯级电站逐月和逐旬的优化调度函数,并通过模拟调度对比分析,最终确定了该梯级电站的优化调度方案。计算表明,该优化成果合理,效益显著,能有效应用于生产实际。 相似文献
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本文根据逐次渐近法(DPSA)的思想,把N库问题分解为在每次迭代中求解单库问题,进而求解了一个水库群长期联合优化调度。本方法还可以考虑径流的时空相关性,使所求水库的最优放水策略是该库蓄水量和其它电站总出力的函数。该方法被用于求解广东电力系统七库联合优化调度取得了满意的数值结果。 相似文献
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Zhen Yu 《Solar Energy》2010,84(4):538-548
A hierarchical fuzzy supervisory controller is described that is capable of optimizing the operation of a low-energy building, which uses solar energy to heat and cool its interior spaces. The highest level fuzzy rules choose the most appropriate set of lower level rules according to the weather and occupancy information; the second level fuzzy rules determine an optimal energy profile and the overall modes of operation of the heating, ventilating and air-conditioning system (HVAC); the third level fuzzy rules select the mode of operation of specific equipment, and assign schedules to the local controllers so that the optimal energy profile can be achieved in the most efficient way. Computer simulation is used to compare the hierarchical fuzzy control scheme with a supervisory control scheme based on expert rules. The performance is evaluated by comparing the energy consumption and thermal comfort. 相似文献
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针对水库运用常规防洪调度进行洪水调度时,因对规则的合理性描述不足而限制了其应用的问题,根据水库不同防洪对象的精细程度要求,结合预见期内水库预报最大洪水和实时水位,拟定分级防洪预报调度规则,建立带有惩罚机制的防洪调度规则参数优化模型,并提出改进遗传算法求解该模型,即通过混沌算法、混沌变异操作与适应度差值进化改善初始种群质量、提高算法局部与全局搜索能力,实现参数控制的防洪预报调度规则。实例应用表明,综合改进遗传算法较其他遗传算法优化性能有一定提高,防洪预报调度优化规则的调度结果优于常规调度规则,为防洪调度规则的合理应用提供了一种有效方法。 相似文献
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In this paper, a new approach to estimate the optimal performance of an unknown proton exchange membrane fuel cell (PEMFC) has been proposed. This proposed approach combines the Taguchi method and the numerical PEMFC model. Simulation results obtained using the Taguchi method help to determine the value of control factors that represent the tested unknown PEMFC. The objective of reducing both fuel consumption and operation cost can be achieved by determining the parameters for the unknown PEMFC. In addition, the optimal operation power for the tested unknown PEMFC can also be predicted. Experimental results on the test equipment show that the proposed approach is effective in optimal performance estimation for the tested unknown PEMFC, thus demonstrating the success achieved by combining the Taguchi method and the numerical PEMFC model. 相似文献
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在详细倒推逐级核算的热力计算的基础上,提出了一种基于遗传算法的调峰时最优运行初压的优化方法。通过遗传机理在有效参数调整范围内搜索系统运行的最优值。优化方法使用FORTRAN 90编程实现,并对实际对象进行了优化计算和结果分析。结果表明该方法能有效地进行优化计算,能用于实际汽轮机组的运行优化。 相似文献
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G.C. Seeling-Hochmuth 《Solar Energy》1997,61(2):77-87
This paper presents a method to jointly determine the sizing and operation control of hybrid-PV systems. Hybrid energy systems use different energy sources such as solar and wind energy and diesel gensets. They are an economical option in areas remote from the grid. In this context the correct and cost-effective system sizing as well as efficient system operation are important. The problem becomes complicated through uncertain renewable energy supplies and load demand, non-linear characteristics of some components, and the fact that optimum operation strategies and optimum sizing of hybrid system components are interdependent. The outlined approach finds an optimum operation strategy for a hybrid system by carrying out a search through possible options for the system operation control. The search is conducted over some time period using estimated weather and demand data and long-term system component characteristics. The costing of the operating strategies is evaluated and component sizes are changed by the designed algorithm according to optimum search rules. As a result an optimum system configuration is chosen by the algorithm together with an optimum operation strategy for a given site and application requirement. 相似文献
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风电机组的性能评估方法具有多样性及复杂性的特点,基于风电场SCADA系统中采集的大量风电机组运行数据,对风电机组转矩控制的性能评估方法进行了研究。在深入分析风电机组中发电机转速与发电机转矩关系的基础上,提出了风电机组在最佳风能利用系数Cp(max)跟踪区内的转矩优化控制的性能评估方法。通过筛选有效数据,拟合计算出风电机组的实际运行转矩增益系数;再通过与理论最优转矩增益系数进行对比,找出风能捕获能力较弱的风电机组,进而采取措施提高其发电量。通过软件仿真及案例分析表明,该方法在不增加设备及成本的情况下,可有效识别因转矩控制的性能差而影响发电量的风电机组,以便及时进行控制策略调校,维护风电场的利益。 相似文献