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In grids with high wind power penetration, the System Operator may curtail the power injected at critical moments for security reasons. An intermediate operator can optimize this power reduction for a group of wind farms under its control, attending to their controllability. In this way, resources may be used efficiently, and in cooperation with the system operation. In this paper, an optimization‐based procedure is proposed to allocate the power reductions among the wind farms of a region. Application examples based on the Spanish situation are shown, because in that country, these intermediate entities (called Delegated Dispatches) are about to begin their full operation. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
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This paper presents a framework to find optimal offshore grid expansions using a transportation model of the power grid. The method extends the standard mixed‐integer linear programming approach to the solution of the transmission expansion planning problem to account for fluctuations in wind power generation and load; this makes the method especially suited to identify optimal transnational offshore high‐voltage direct current grid structures for the integration of large amounts of offshore wind power. The applicability of the method is demonstrated by a case study of the North Sea region. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
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The planning of new units for electrical power generation is a problem which involves different and conflicting aspects. Besides cost, security issues and environmental concerns must be explicitly incorporated into the models. In this way mathematical models become more realistic, and they enhance the decision maker's comprehension of the complex and conflicting nature of the distinct aspects of the problem. A multiple objective linear programming model for power generation expansion planning is presented. The model considers three objective functions (net present cost of the expansion plans, reliability of the supply system, and environmental impacts) and three categories of constraints (load requirements, operational restrictions and budget). Three generating technologies are considered for power system expansion: oil, nuclear and coal. 相似文献
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In this paper, an adaptive simulated annealing genetic algorithm is proposed to solve generation expansion planning of Turkey's power system. Least‐cost planning is a challenging optimization problem due to its large‐scale, long‐term, nonlinear, and discrete nature of power generation unit size. Genetic algorithms have been successfully applied during the past decade, but they show some limitations in large‐scale problems. In this study, simulated annealing is used instead of mutation operator to improve the genetic algorithm. The improved algorithm is applied to the power generation system with seven types of generating units and a 20‐year planning horizon. The planning horizon is divided into four equal periods. The new algorithm provides approximately 6.6 billion US$ (3.2%) cheaper solution than GA and also shows faster convergence. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
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本文在地区水、火电站组成的电力系统容量扩建基础上,研究了规划期内水电厂和火电厂的投产顺序优化模型。模型中考虑了电厂间相互关联,从而得到含有逻辑表达式的非线性整数规划模型。 相似文献
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Large integration of intermittent wind generation in power system has necessitated the inclusion of more innovative and sophisticated approaches in power system investment planning. This paper presents a novel framework on the basis of a combination of stochastic dynamic programming (SDP) algorithm and game theory to study the impacts of different regulatory interventions to promote wind power investment in generation expansion planning. In this study, regulatory policies include Feed-in-Tariff (FIT) incentive, quota and tradable green certificate. The intermittent nature and uncertainties of wind power generation will cause the investors encounter risk in their investment decisions. To overcome this problem, a novel model has been derived to study the regulatory impacts on wind generation expansion planning. In our approach, the probabilistic nature of wind generation is modeled. The model can calculate optimal investment strategies, in which the wind power uncertainty is included. This framework is implemented on a test system to illustrate the working of the proposed approach. The result shows that FITs are the most effective policy to encourage the rapid and sustained deployment of wind power. FITs can significantly reduce the risks of investing in renewable energy technologies and thus create conditions conducive to rapid market growth. 相似文献
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计及分布式发电(DG)进行配电网扩展规划.从电网年支出费用的角度出发,采用蒙特卡洛方法模拟DG的出力,建立新的数学模型.提出一种基于隐性编码方式的遗传算法,用它对待选新建或升级改造线路、DG的种类、位置和容最进行综合优化规划,并分析DG出力不确定性及其发电成本对规划的影响.经算例验证,对DG进行合理地选择、布点和定容,能够给电网带来可观的经济效益. 相似文献
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为了更直观地分析风光储混合发电商对市场均衡博弈结果和市场力的影响,在偏差电量考核衡量风光储混合发电出力随机波动性的基础上,综合考虑各发电商的出力限制和储能系统的运行约束,建立以风光储混合发电商和传统发电商收益最大化为目标的市场均衡博弈模型,调用CPLEX软件求解利用非线性互补函数处理得到的混合整数规划模型,并对比分析了风光储混合发电商作为价格接受者和影响者参与电力市场竞争对均衡博弈电价和投标出力的影响。结果表明,风光储混合发电商参与电力市场竞争可抑制传统发电商的市场力,对电价有显著的\"削峰填谷\"作用;当风光储混合发电商作为价格影响者时,对电价的影响会减弱,但其收益有所增加。 相似文献
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随着城市电网中光伏容量不断攀升,其容量规划问题的研究也迫在眉睫。该文考虑光伏出力与城市负荷的时序关系,结合火电机组的调频限制,利用混合整数线性规划法建立一种基于时序生产模拟的光伏容量规划模型。规划目标为在满足负荷需求下综合发电成本最低,包括火电机组调频成本和弃光成本。最后,以中国某地区实测数据为例,验证了该方法的有效性,同时分析了光伏接入容量与负荷类型的关系,为城市电网光伏容量规划提供了参考。 相似文献
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针对风光并网会降低系统惯量、削弱系统调频能力的问题,综合考虑水电机组同步惯量、风电场和光伏电站的虚拟惯量和下垂控制作用,提出含风光水的多机系统动态频率响应模型,推导系统频率变化率约束、最低点频率偏差约束和准稳态频率偏差约束。基于此,为实现清洁能源利用最大化,以弃风、弃光、弃水最小及水库调度期末蓄能最大为目标,兼顾梯级水电、风电、光伏和发电系统的多种运行约束,构建风光水互补发电系统短期优化调度模型,并使用混合整数线性规划方法进行求解。最后通过算例仿真验证所提模型的有效性和适用性。 相似文献
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将需求侧响应与抽水蓄能电站纳入系统优化调度,借助需求侧管理与抽水蓄能电站对负荷分布的调控能力以达到提高风电消纳水平和降低电网运营费用的目的。以弃风总量最小和电网购电费用最低为优化目标,并考虑系统功率平衡、机组启停时间、爬坡能力、机组出力界限、系统备用等约束条件,构建含大规模风电的源荷储协调优化调度模型,将模型转化为混合整数问题并应用MOSEK优化软件对其进行求解。算例结果表明,借助需求侧管理与抽水蓄能电站的协作效应,系统对风电消纳能力将有所提高,电网购电费用亦进一步降低。 相似文献
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Motivated by the increasing transition from fossil fuel–based centralized systems to renewable energy–based decentralized systems, we consider a bi‐objective investment planning problem of a grid‐connected decentralized hybrid renewable energy system. In this system, solar and wind are the main electricity generation resources. A national grid is assumed to be a carbon‐intense alternative to the renewables and is used as a backup source to ensure reliability. We consider both total cost and carbon emissions caused by electricity purchased from the grid. We first discuss a novel simulation‐optimization algorithm and then adapt multi‐objective metaheuristic algorithms. We integrate a simulation module to these algorithms to handle the stochastic nature of this bi‐objective problem. We perform extensive comparative analysis for the solution approaches and report their performances in terms of solution time and quality based on well‐known measures from the literature. 相似文献
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为了降低热电联产系统能量调度算法计算的复杂度,减少计算时间,提出了一种基于If-Then-Else规则的热电联产系统能量调度方法。通过引入逻辑变量来描述设备的启停状态和工作模式,建立混合逻辑动态模型,在模型预测控制的框架下,根据实时电价以及本地能源、电力负荷和热力负荷的预测结果,为模型中的二元决策变量赋值,从而将模型中的混合整数线性规划问题转化为线性规划问题。最后,通过仿真将本文提出的方法和混合整数线性规划方法进行比较,结果表明,本文所采用的方法在性能上几乎没有损失,平均计算时间降低65%。 相似文献
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This paper studies an integration model of production planning, scheduling, and order‐ based inventory distribution control systems. It models supply‐chain and production dynamics and employs process control to supply‐chain operations and the production process and scheduling. It embeds generalized disjunctive programming (GDP) and branch‐and‐reduce algorithms to obtain an optimal solution. Generalized disjunctive programming reformulates the original mixed integer nonlinear programming (MINLP) model and solves the new model with a lower number of integer variables. Afterwards, the branch and reduce algorithm, which is strengthened with outer approximation (OA) cutting planes, is able to find optimal solutions with permissible optimality gaps. The results show that supply network size does not affect forecast accuracy; there is a forecast error rate of 12.9%. Similar figures are also shown for the inventory level, which is expected to be 32% of demand level, production changeover time at 0.58 days, inventory ramp‐up period to meet the expected raw materials and final products inventory at 0.02 and 0.04 days respectively, and extra delivery time to meet a certain level of demand change at 1.1 days. The results show that the model is capable of controlling demand forecast, inventory level, and delivery quantity, so that the supply chain can avoid stock out at a minimal level of inventory, regardless of the size of supply‐chain networks. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd. 相似文献
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提出了一种融入灰色关联度分析的最小二乘支持向量机建模方法,建立了垃圾焚烧发电污染物排放过程模型。验证结果表明,模型预测值与实际值的最大相对误差为7.8%,模型拟合平均绝对百分误差最大为4.67%,外推平均绝对百分误差最大为3.98%,模型能够较好地模拟垃圾焚烧过程中污染物排放过程特性。在此基础上,拟合设计了垃圾焚烧过程排放烟气污染物多目标优化函数,以二噁英排放值为主要评价指标,从Pareto最优解集合中选取出二噁英排放值较低的最优解子集。结果表明,优化计算值明显低于实际值,验证了设计方法的可行性和有效性。 相似文献
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基于自适应遗传算法的金盆水库优化调度研究 总被引:5,自引:4,他引:5
根据黑河金盆水库的具体情况。建立了水库优化调度的多目标非线性数学模型。分别利用动态规划、遗传算法和自适应遗传算法求解模型。结果表明,自适应遗传算法由于能够根据群体适应度的分散程度以及个体优劣进行参数的自适应调整。使得算法在保持种群多样性的同时,保证算法的收敛性,其收敛速度和计算结果都明显优于其他两种算法。 相似文献