共查询到20条相似文献,搜索用时 203 毫秒
1.
针对标准动态规划算法应用于梯级水库群发电优化调度求解时的"维数灾"问题,基于大系统分解协调原理建立了二级(分解、协调)递阶结构的梯级水库群发电优化调度模型。在分解级,应用多线程技术实现了标准动态规划算法的并行化,以对分解后的单库子系统进行优化求解;单库子系统间的耦合关联作为协调级,反复与分解级交换信息,经迭代计算求得模型的最优解。通过应用于李仙江三库梯级系统的实例验证分析,结果表明该方法可在一定程度上提高求解效率,为复杂工程系统优化提供了理论参考。 相似文献
2.
以光伏-储能电池系统为研究对象,构建光储系统的配置-运行优化分解协调模型.首先,将考虑储能投资成本与光储系统运行成本在内的综合费用作为目标函数,利用Benders分解方法将模型分解为规划配置主问题和运行调度子问题,然后,通过分解协调优化得到储能电池的最优配置方案与系统的优化运行策略,通过设定光伏消纳率、自给率、内部收益率、动态投资回收期等一系列指标,对模型进行评价.此外,实现了 Benders分解法收敛过程和Bender割集累积过程的可视化,直观展现出容量配置与优化运行的交互作用.基于此,进一步利用K-means聚类分析算法建立了年光伏出力模型,求解长时间尺度上储能电池的最优配置,探讨了分解协调优化模型在中长期尺度下求解的可行性. 相似文献
3.
针对标准动态规划算法应用于梯级水库群发电优化调度求解时的"维数灾"问题,基于大系统分解协调原理建立了二级(分解、协调)递阶结构的梯级水库群发电优化调度模型。在分解级,应用多线程技术实现了标准动态规划算法的并行化,以对分解后的单库子系统进行优化求解;单库子系统间的耦合关联作为协调级,反复与分解级交换信息,经迭代计算求得模型的最优解。通过应用于李仙江三库梯级系统的实例验证分析,结果表明该方法可在一定程度上提高求解效率,为复杂工程系统优化提供了理论参考。 相似文献
4.
5.
最小化运行费用的时变重构全局优化算法 总被引:5,自引:0,他引:5
该文提出了一种以运行费用最小为目标的时变重构全局优化算法。将时变重构问题分解为多个静态重构子问题,使用核心模式遗传最短路算法(CSGSA)分别求解每个子问题,得出候选放射状网络结构,并使用动态规划,根据各子问题的结果求解全局最优的时变重构策略。算法还对开关操作次数约束进行了处理,使之不影响动态规划的全局最优性。所提算法是配电网络实时调度,规划和离线分析的有效工具。 相似文献
6.
7.
8.
9.
10.
基于混合粒子群算法并计及概率的梯级水电站短期优化调度 总被引:1,自引:0,他引:1
针对梯级水电站短期优化调度的不确定性问题,研究了不确定性因素的概率分布规律,并根据实际系统的运行要求,给出了概率分布密度函数的假设检验方法。探索发电用水量与各种随机因素的互动关系及影响机理,构建了一种新的计及概率的梯级水电站短期优化调度策略。把灾变理论、混沌优化思想和基本粒子群算法结合起来,形成一种混合粒子群算法。该算法扩大了种群的搜索空间,增加了种群的多样性,改善了基本粒子群算法摆脱局部极值点的能力,并能从理论上证明其依概率收敛至全局最优解。将混合粒子群算法嵌入蒙特卡罗随机模拟中对本文提出的模型进行求解,求解方法简单有效。仿真结果表明,该策略能较好地处理不确定性条件下梯级水电站的短期优化调度问题。 相似文献
11.
含风电场电力系统经济调度的模糊建模及优化算法 总被引:41,自引:13,他引:28
随着人们对风电的日益关注,新型风电场的容量在并网系统中所占比例不断增加,这对传统电力系统的经济调度问题提出了新的要求。特别是风电场输出功率的随机变化给系统的经济调度带来了更多的不确定性因素。文中应用模糊理论建立了含风电场电力系统动态经济调度的模糊模型,使调度结果能够表达决策者的意愿,从而更好地适应风机输出功率的随机性。在优化算法上,利用下降搜索思想对传统粒子群算法进行了改进,并将改进后的算法用于求解提出的动态经济调度问题。在算例中进行了测试,结果验证了所提出的方法的可行性。 相似文献
12.
This paper develops an efficient and practical approach for determining the feasible optimal solution of the economic dispatch problem when some of the online units have prohibited operating zones. When a unit has prohibited operating zones, its operating region will be broken into isolated sub-regions, which results in multiple decision spaces for the economic dispatch problem. For each of the decision spaces, it can be either feasible or unfeasible with respect to the system demand. The feasible optimal solution for the dispatch problem can only reside in one of the feasible, spaces, and can be found by performing the conventional λ-δ iterative search based on the equal-incremental-cost criterion in each of the feasible spaces. However, for a system with a large number of decision spaces, such an exhaustive search method would not be acceptable in real time operation due to its high computational time requirement. In this paper, a novel approach is proposed. It defines a small and advantageous set of decision spaces, uses an efficient algorithm to determine the most advantageous space and then utilizes the conventional λ-δ iterative method to find the feasible optimal dispatch solution 相似文献
13.
This article deals with the coordination of security-constrained economic dispatch and load frequency control in an interconnected power system. The realistic and performance optimization inherent of the load frequency control (LFC) and security-constrained economic dispatch are fully considered without simplifying assumptions. For this purpose, modeling security-constrained economic dispatch as a discontinuous control action in the continuous frequency response model of a power system is well addressed. Considering conflict behavior of LFC and security-constrained economic dispatch beside the powerfulness of the multi-objective genetic algorithm (GA) to solve high-dimensional problems with conflicted objective functions makes it attractive for the automatic generation control coordination problem. The employed security-constrained economic dispatch utilizes the advantages of dynamic economic dispatch to achieve more realistic results. The GA is used to compute the decentralized control parameters and centralized generation levels of the on-line units to achieve an acceptable operating point. A significant modification in convergence speed has been performed by using LFC model properties in corporation with the genetic algorithm, so the proposed method gives considerable promise for implementation in multi-area power systems. The efficiency of the proposed algorithm and modification is demonstrated on a three control area power system. 相似文献
14.
The problem of analytically coordinating dissimilar voltage control actions to prevent voltage collapse in a large power system is addressed. A framework for hybrid voltage control based on coordination of controls with different response time and dynamic characteristics is presented. The proposed method is based on a security constrained steady-state approach. The minimum distance from the operating point to the bifurcation boundary is used to evaluate system voltage security. The optimal control direction toward adequate security is then obtained by calculating the sensitivity of the minimum distance with respect to control parameters. The actual dispatch of controls along the optimal direction, which takes into account impacts of economic cost and control availability, is determined as the solution of a multiple-stage optimization problem using differential dynamic programming. The algorithm is demonstrated for a system with dynamic load models representing the main grid of New South Wales, Australia 相似文献
15.
This article proposes an improved interval optimization method based on differential evolution for dynamic economic dispatch of a microgrid. First, the dynamic economic dispatch model applied is a microgrid model considering various distributed generations, energy storage systems, the transaction between the microgrid and power grid, as well as multiple kinds of loads. Both economic and environmental costs are taken into account. Second, an improved interval optimization method based on differential evolution is proposed to solve this non-linear optimization model. The proposed method is improved in the aspects of the branch-and-bound strategy, acceleration tool, and interval estimation method. Finally, a practical dynamic economic dispatch case of a microgrid considering the valve-point effect is studied. A comparison among the proposed method, traditional interval method, differential evolution method, and interior point method is given to verify the efficiency and practicality of the improved interval optimization method. 相似文献
16.
17.
18.
基于风速预测和随机规划的含风电场电力系统动态经济调度 总被引:45,自引:7,他引:45
随着风力发电在电力系统中比重的持续增加,在电力系统经济调度中需要考虑风电场的影响;而并网风电场具有动态、随机、容量大等特点,传统的经济调度方法已不再适用。针对风电场出力的随机性,在风速预测的基础上,应用随机规划理论建立了考虑机组组合的含风电场电力系统动元网络和遗传算法的混合智能算法,提高了算法的收敛速度和搜索性能。以含风电场的IEEE30节点系统为算例验证了所提方法的可行性和有效性。 相似文献
19.
D. M. Falco 《International Journal of Electrical Power & Energy Systems》1991,13(6):330-336
A methodology for power system operating state forecasting with applications in the study mode security analysis is described. Additional application areas are advance or dynamic dispatch and measurement replacement. The operating state is represented by the active and reactive nodal injections which are forecast using a four-step procedure: bus active and reactive load forecast, simulation of the economic dispatch and on-line load flow. The multivariate Box and Jenkins approach and the adaptive Kalman filter are used for the active and reactive bus load forecast, respectively. The results of numerical experiments with the proposed methodology indicate a performance with potential for practical applications. 相似文献
20.
为了解决常规空调调度中切除负荷带来的电网运行稳定问题,在集群空调的调度中考虑空间上的优化组合,提出一种考虑网损和调度偏差最小的自上而下双层优化动态调度决策方法。在空调的聚类建模中,研究空调参数和运行状态的差异性,分析并验证聚类中的误差约束值和分组数对调度准确性的影响;在双层优化调度中,通过最优潮流计算合理地分配空间上调度的容量,有效减小网损与电压越限的可能性;结合动态调度,提高调度的准确性,保证用户的舒适性。IEEE 33节点配电网算例结果验证了所提算法的可行性和准确性。 相似文献