共查询到19条相似文献,搜索用时 312 毫秒
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鉴于水库群是一个复杂的大系统,包括水库来水、需水和供水决策等在内的诸多方面,考虑水库群之间的库容调节特点,将水库群等效为一个聚合水库,以聚合水库调度图和供水任务分配原则作为调度模型供水决策变量,引入动态供水分配因子作为成员水库间供水分配原则,确定逐时段不同来水情况下水库群的最优供水方案及成员水库之间供水任务优化分配,建立基于合理供配水原则的水库群联合供水调度模型。实例应用结果表明,该水库群联合供水调度模型可使供水系统的水资源得到充分利用,在满足用水户设计保证率要求的同时,增大了水库群供水能力,减少了无效弃水量,并实现了供水任务在各成员水库之间的合理分配,具有显著的社会效益和经济效益。 相似文献
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建立了一般水库群洪水调度系统的数学模型,并提出了补偿调度的求解方法,补偿调度的基本思路是:首先根据各水库的入库洪水过程,按照各水库的洪水调度规程从上至下进行独立调洪计算,再与区间洪水合成防洪控制点的流量过程;若出现超载水量,则从两方面调整各水库的泄洪策略(拦蓄与预泄),以达到避免或减少分洪水量的目的。所提出的通有型水库群洪水调度模型及补偿调度算法具有一般性,有利于编制开发通有型水库群洪水调度系统软件,其计算成果为制定人机交经方案提供了强有力的支持。 相似文献
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针对浑江梯级水库群汛期调度问题,建立了汛期洪水退水段梯级水库群发电优化调度模型,并用遗传算法对该模型进行求解.实例表明,该研究可减少弃水、增加发电效益,对指导汛期洪水退水段水库调度具有实用价值. 相似文献
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《International Journal of Hydrogen Energy》2022,47(94):40026-40040
The durability of the proton exchange membrane fuel cell (PEMFC) has always been a major obstacle in its commercialization process and effective degradation prediction can improve this problem to a certain extent. Data-driven degradation prediction model is one of the most effective prediction methods available, which is able to ignore the structure of the PEMFC itself and rely solely on the data to make predictions, greatly simplifying the prediction process. Echo state network (ESN), as one of the data-driven methods, has received much attention for its low computational complexity and fast convergence in the degradation prediction of PEMFC. In this paper, the multi-reservoir echo state network with mini reservoir (MRM) degradation prediction model of PEMFC is proposed. The structure of MRM is that the main reservoirs are stacked in a layer and the mini reservoir is in the next level to collect and organize the main reservoir states. In addition, in order to improve the prediction accuracy, this paper firstly uses Savitzky-Golay (SG) filter to process the original data, and then investigates the influence of two important parameters, the number of main reservoirs and the number of main reservoir neurons, on the prediction accuracy and finds the optimal number of main reservoirs and main reservoir neurons for this model using particle swarm optimization (PSO) algorithm. Finally, the effectiveness of the model is verified on different lengths of training sets under both static and dynamic conditions. The results show that the model has higher accuracy and better robustness in the PEMFC degradation prediction compared with other models. 相似文献
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J. Roh J.-S. Lim H.-J. Park J. M. Kang 《Energy Sources, Part A: Recovery, Utilization, and Environmental Effects》2013,35(1):10-19
Abstract The analysis of production systems in multi-reservoir gas fields is required to optimize production rates and enhance ultimate recovery. Conventional methods involve enormous computational efforts since production systems from reservoirs to a gathering station have been considered as one structure, and production rates are optimized step-by-step in terms of objective functions. In this study, a new technique is developed to reduce the structural complexities of previous techniques and to consist of branch-systems including reservoirs and a surface branch-system without reservoirs. All branch-systems can be treated independently in this method. The decision variables including pressures and production rates in a branch-system, which are determined by the size of reservoir, the producing capacity of reservoir, and the initial pressure of reservoir, are updated simultaneously at every iteration step to accelerate its convergence. The method can analyze multi-reservoir gas fields with a fixed gross production rate at the gathering station efficiently. The results for two fields have shown that the method required less computational efforts and provided relatively accurate outputs for conventional techniques applied to two fields. 相似文献
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风光水互补发电系统优化调度需要考虑风光电源的间歇性及波动性,同时还要处理梯级水库复杂的水力联系及不同电源之间的电力联系,因而建立风光水互补发电系统短期调峰优化调度模型,并采用粒子群算法进行求解,针对粒子群算法的早熟及后期收敛速度慢等问题,从惯性因子和种群拓扑结构两方面对粒子群算法进行改进,并对福建省电力调控中心管辖的12座常规水电站、木兰溪1座抽水蓄能电站、31座风电场、5座光伏电站组成的风光水多种电源互补系统进行数值分析。结果表明,所建模型能较好地实现对电网负荷的削峰填谷,所提算法显著提高了求解效率和求解质量,是一种解决风光水互补发电系统短期联合优化调峰调度实用性很强的有效算法。 相似文献
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网络环境下基于模型驱动的水库群防洪联合调度系统 总被引:2,自引:1,他引:2
在分析水库群实时防洪调度特点的基础上,以JBuilder为开发工具,采用Oracle数据库研究开发了结构合理、功能齐全、界面友好和实用性强的网络环境下的水库群防洪联合调度系统。阐述了利用上述平台进行系统设计和开发的关键技术。该系统主要特点是支持异地用户进行联合调度方案的在线制定。支持从洪水预报数据预处理、初始条件设置、水库限制条件选择、模拟调度到决策会商和报表制定等决策制定的全过程。 相似文献
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近年来,城市化、工业化的发展使得城市对水资源的需求日益增加,为解决城市用水紧张,水库联合调度已成为新的应对措施之一。不同水库水质及污染物来源不同,导致联调水质风险陡增。为分析水库联合调度后水库间水质的相互影响,利用Mike21水动力-水质模型,模拟上游水库不同水质的调水对下游库区的影响,并预测其分布情况。结果表明,调水工程实施后受水水库总体水质较工程未实施前变差,除TP、TN浓度受水库初始浓度影响不能满足要求外,COD和氨氮浓度均较低;上游调水水库水质好坏直接影响下游水库坝址处的下泄水质。水库水质的模拟结果可为水源地的保护及水库的污染治理提供依据。 相似文献
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核动力装置是一个高度复杂并具有高度安全性要求的结构体系,其故障检测方法一般采用传统的阈值方法。为克服阈值方法的不足,提出了基于RBF(radial basis function)神经网络的核动力装置故障诊断方法。该方法选择对核动力装置安全具有重要影响的运行参数作为神经网络的输入,并利用核动力装置正常运行模式及典型故障模式的监测数据作为训练样本,网络训练采用正交最小二乘算法(orthogonal least square,OLS)。为了验证所提方法的可行性,利用核动力装置运行监测数据进行检验。结果表明,RBF神经网络成功地诊断出了故障,具有良好的诊断效果。 相似文献