光伏电站区域投资机会研究

为便于光伏电站投资者快速辨别投资机会,抢占地面光伏电站投资先机,本文依据国家最新政策,通过对各资源区代表性项目的太阳能辐射资源、建设成本费用及盈利能力分析,辨别各资源区的投资价值。     

光伏电站投资之忧

光伏组件商纷纷将触角伸向下游,暂时缓解了组建的积压和库存压力,但短期内光伏电站的扎堆建成,会否让这一产业从一个泡沫演变成另一个泡沫？     

光伏电站建设项目投资预算的编制

结合以往编制光伏电站投资预算的经验,针对青海省送电到乡工程,提出了光伏电站建设项目投资预算的编制原则及方法,给出了编制光伏电站建设项目预算定额采用的依据、预算编制的步骤和内容。     

大型地面光伏电站发电成本分析

近年来,中国的光伏产业发展迅速,发电成本逐渐降低.介绍了影响光伏发电成本的因素并分析了其对光伏发电成本的影响,同时以实例介绍了现阶段典型光伏电站发电成本及投资效益分析,为投资者进行光伏电站投资提供一定的理论技术支持.     

水面漂浮式光伏电站的经济性分析

地面光伏电站会占用大量土地且其发电效率受到光伏组件工作温度的限制,但水面漂浮式光伏(FPV)电站不仅可提升发电效率,还能在一定程度上缓解用地紧张等问题。太阳电池在水体附近的工作温度低于其在空气中的工作温度,太阳电池的负温度系数特性使其在FPV电站的光电转换效率提高,从而使电站整体发电效率提高。对FPV电站采用的太阳电池的工作温度进行分析,并以山东大学热科学与工程研究中心的学者得出的“FPV电站中太阳电池的实际光电转换效率比地面光伏电站中太阳电池的高1.58%～2.00%”研究结论为理论依据,从年发电量、投资成本、投资回收期和平准化度电成本(LCOE) 4个方面对FPV电站的经济性进行分析;最后对几种可再生能源发电方式与FPV电站相结合形成的混合型电站的设计方式进行介绍。分析结果显示：FPV电站的LCOE可低至0.4元/kWh。发电效率高、占地面积小、LCOE低且对水体起到保护作用等优势使FPV电站的未来发展前景可观。     

光伏电站的可靠性分析

本文初步探讨了组成光伏电站的各主要部分与系统可靠性的关系，提出一些影响可靠性的问题及相应采取的措施。     

荒漠光伏电站的电气设计分析

通过对大型并网光伏电站典型主接线的介绍,说明了大型并网光伏电站的主要技术原则,阐述了大型并网光伏电站的主接线原则、设备配置原则和主要参数选择等技术条件,并特别说明了几个重点问题。推荐通过标准化的方法完成并网光伏电站的设计,提高并网光伏电站运行的可靠性。     

光伏电站夜间下网电费构成分析及优化方法研究综述

随着光伏产业的迅速发展,光伏电站的数量与规模不断增长,降低运营成本成为电站提升经济效益的关键。夜间下网电费是光伏电站运营成本的重要组成部分,本文旨在从减少夜间下网电量和提升夜间功率因数两方面入手,深入探讨降低光伏电站夜间下网电费的有效策略。     

并网光伏电站关键部件的运行性能分析

简要概述了50kW大型并网光伏电站的系统构成;通过一段时间的运行,对该电站的一些关键部件进行性能评价。分析结果表明：电站的光伏组件设计合理,并网逆变器具有较高的转换效率。     

泰国罗勇府屋顶光伏电站的效益分析

介绍了泰国罗勇府3 MW屋顶光伏电站的系统构成,从理论上计算了该电站在泰国罗勇府气候条件下的发电能力,并进行了效益分析,展望了屋顶光伏电站在泰国罗勇府地区的应用前景.     

光伏系统最大功率点跟踪方法

最大功率点跟踪是光伏发电系统中重要的问题.在对太阳电池特性曲线分析的基础之上,阐述了几种常用的光伏系统最大功率点的追踪方法.文章总结并分析了各种方案的优缺点.     

光伏电站组件和运行方式组合及其容量优化配置研究

文章针对大规模并网光伏电站出力波动较大的问题,提出一种光伏组件和运行方式的组合及其容量优化配置的方法。该方法考虑光伏系统在典型天气下出力特性的互补性、初始投资成本、运行维护成本、占地面积等因素建立数学模型,从而进行容量配置。实例研究表明:与各组合的光伏系统单独运行时相比,最优容量配置方案可降低光伏电站出力波动34.63%~50.97%,降低平准化度电成本7.81%~10.31%;土地成本升高时,单位容量占地面积小的运行方式的容量配比逐渐增加;初始投资至少需要降低30%,方可使共和光伏实证基地平准化度电成本小于该地区最新上网指导电价。     

分布式光伏发电系统最大功率点跟踪技术比较研究

基于当前光伏阵列最大功率点跟踪技术的研究现状,介绍了适用于分布式光伏发电系统最大功率点跟踪的各种常用控制方法,阐述了每一种控制方法的技术原理,分析和比较了这些常用控制方法的特点,总结了各自的优点和缺点,最后对分布式光伏发电系统最大功率点跟踪方法的选择问题进行了探讨,并指出了具体选择方法时应综合考虑的各种因素。     

光伏并网逆变器辅助电源的设计

采用光伏并网技术的太阳能发电已成为目前发展最快、应用面最广的太阳能利用方式之一.文章介绍了光伏并网系统中逆变器辅助电源的工作原理,这种辅助电源是由TOPSwitch芯片组成的高频开关电源,它降低了辅助电源的生产成本,简化了电路,提高了整个电路板的电磁兼容性,具有较高的使用价值.     

Modelling utility-scale wind power plants. Part 1: Economics

As the worldwide use of wind turbine generators continues to increase in utility-scale applications, it will become increasingly important to assess the economic and reliability impact of these intermittent resources. Although the utility industry in the United States appears to be moving towards a restructured environment, basic economic and reliability issues will continue to be relevant to companies involved with electricity generation. This article is the first of two which address modelling approaches and results obtained in several case studies and research projects at the National Renewable Energy Laboratory (NREL). This first article addresses the basic economic issues associated with electricity production from several generators that include large-scale wind power plants. An important part of this discussion is the role of unit commitment and economic dispatch in production cost models. This paper includes overviews and comparisons of the prevalent production cost modelling methods, including several case studies applied to a variety of electric utilities. The second article discusses various methods of assessing capacity credit and results from several reliability-based studies performed at NREL. Copyright © 1999 John Wiley & Sons, Ltd.     

An ANP-based approach for the selection of photovoltaic solar power plant investment projects

In this paper the Analytic Network Process (ANP) is applied to the selection of photovoltaic (PV) solar power projects. These projects follow a long management and execution process from plant site selection to plant start-up. As a consequence, there are many risks of time delays and even of project stoppage.In the case study presented in this paper a top manager of an important Spanish company that operates in the power market has to decide on the best PV project (from four alternative projects) to invest based on risk minimization. The manager identified 50 project execution delay and/or stoppage risks.The influences between the elements of the network (groups of risks and alternatives) were identified and analyzed using the ANP multicriteria decision analysis method. Two different ANP models were used: one hierarchy model (that considers AHP as a particular case of ANP) and one network-based model. The results obtained in each model were compared and analyzed. The main conclusion is that unlike the other models used in the study, the single network model can manage all the information of the real-world problem and thus it is the decision analysis model recommended by the authors. The strengths and weaknesses of ANP as a multicriteria decision analysis tool are also described in the paper.     

风/光互补发电系统的优化设计

在分析现有风/光互补发电系统研究的基础上,确定风机容量与PV组件容量在系统总容量中所占的比例;根据安装地点气候条件与地理条件、负载要求,估算出蓄电池的最低容量,并归纳设计各部件的数量和类型选择的约束关系;综合给出一种适合于风/光互补发电系统优化设计的模型。     

内蒙古建设大型并网光伏沙漠电站的可行性分析

合理利用现有资源、改善能源结构,已成为可再生能源发展的指导思想.有效地利用内蒙古荒漠资源建设大型并网光伏沙漠电站,是实现能源可持续发展战略,开拓和发展可再生能源的必由之路.文章从政策指导、太阳能资源、荒漠资源和电网交通等方面,分析了在内蒙古建设大型并网光伏沙漠电站的可行性.     

某15MW太阳能屋顶光伏发电工程的应用分析

在对太阳能屋顶光伏发电系统构成及发展意义阐述的基础上,通过对某15MW屋顶光伏发电工程大量实际数据的分析,表明太阳能屋顶光伏发电工程具有良好的社会、经济效益和广阔的发展前景。     

Technical efficiency of thermoelectric power plants

This paper analyses the technical efficiency of Portuguese thermoelectric power generating plants with a two-stage procedure. In the first stage, the plants' relative technical efficiency is estimated with DEA (data envelopment analysis) to establish which plants perform most efficiently. These plants could serve as peers to help improve performance of the least efficient plants. The paper ranks these plants according to their relative efficiency for the period 1996–2004. In a second stage, the Simar and Wilson [Simar, L., Wilson, P.W., 2007. Estimation and inference in two-stage, semi-parametric models of production processes. Journal of Econometrics 136, 1–34] bootstrapped procedure is adopted to estimate the efficiency drivers. Economic implications arising from the study are considered.