云南风能可开发地区风速的韦布尔分布参数及风能特征值研究

选用Ｖ和Ｖｍａｘ估计云南的韦布尔分布参数。计算分析云南风能可利用地区的风能特征值Ｗ、Ｗｅ、ｔ，有几个站还直接用自记风速资料计算其风能特征值。     

也谈风能计算中的瑞利分布订正

提出了瑞利分布的订正式及其参数的确定方法。该订正式不仅可以计算平均风速超过４．５ｍ／ｓ地区的风能，而且可以计算低于４．５ｍ／ｓ钢速地区的风能，且精度较高，从而拓宽了瑞利分布统计风能的范围。     

我国风能资源量的商榷

关于中国风能资源的评估大多数的文献都认为我国陆地风能可开发量为2．53亿kW，海洋可开发量为7．5亿kW。比较典型的论述见于文献《我国风能资源储量估计分析》，该文献利用我国900余个气象站的多年年平均风能密度计算绘制的全国年平均风能密度分布图，对我国各省及全国的离地面10m高度层上的风能资源储量进行了首次完整细致的估算。     

风能的计算方法

若要了解风能的蕴藏量、各地的风力分布状况,探讨风能开发利用的价值,制定风能利用规划或选择风机设置的最佳位置,都必须先进行风能计算。国内外计算风能的方法很多,现将常用的一些方法简介如下。     

江苏省风能资源的分布和利用

江苏省地处祖国的东南沿海，境内河网交错，水域面积大，风能资源较为丰富，里中地区有我能利用的悠久历史，本文应用１９７５～１９９０年气象站的自记风资料，用代表年法计算了敛上４０个站点的风能，对风能的年，季，日变化作了分析，前功尽弃人此依据进行了敛上的风能区划，同时还分析了江苏近看见风能利用的情况，从而为今后本省开发和利用这一自然能源的潜力和前景作了探讨和展望。     

太阳能—风能转换的内可逆双热机模型

提出了地球大气太阳能—风能转换的双热机并联模型。在这个模型中，大气作为热机工质进行内可逆循环。太阳能—风能转换的不可逆性并入热机的辐射热阻来考虑。两热机的输出机械功全部转换为大气风能。该模型的数值计算结果与实际风能的观测值基本符合。     

尖山子风电场风能资源评价

根据尖山子风电场1999年7月～2000年6月测风资料，对风电场的风能资源各参数进行了详细地计算和分析，从而得出尖山子地区风能资源丰富，适宜建设大型风电场，具有较大的开发利用价值的结论。     

风能资源评估系统搭建方法研究

复杂地形和低风速风电场风能资源评估过程中,在缺少实测数据的情况下寻找风能资源丰富的开发区域,对提高风电场的盈利能力具有重要的现实意义。本文针对风电场开发前期有效数据匮乏的情况,在传统风能资源评估系统的基础上,引入大气模式进行大范围计算获得中尺度计算结果,同时引入陆地卫星遥感资料处理技术,获得大范围高精度的地表粗糙度信息,结合计算流体动力学技术对中尺度数据进行降尺度,建立大气模式和计算流体动力学技术双核心的风能资源评估系统。本文所建立的先进风能资源评估系统可以满足复杂地形和低风速风电场风能资源评估的工程需要,从而拓宽了风能资源评估的途径。     

我国风电开发面面观

我国风电开发面面观施鹏飞风能资源及其分布风能是地球表面空气移动时产生的动能。由于风速是一个随机性很大的量，必须通过长时间的观测计算出平均风功率密度。根据风的气候特点，一般选取十年风速资料中年平均风速最大、最小和中间的三个年份为代表年份，分别计算该三个...     

老爷庙风电场风能资源评价

本文利用老爷庙风电场2001年4月～2002年4月逐时平均风向、风速资料，对老爷庙风电场的风能资源各参数进行了计算和分析，并与附近星子气象站累年或同期资料进行比较，对老爷庙风电场风能资源进行评价。     

Repowering—Next big thing in India

Indian wind energy sector has seen a CAGR of more than 27% during the period 2002–2007. However, the annual capacity additions has been declining for the past 2 years and recently, India lost one place in the Global ranking on total installed wind capacity to China. While issues like unfavourable tariff, non-uniform state policies, unavailability of evacuation infrastructure, etc. can be attributed to the slower pace of capacity addition, the issue of unavailability of on-shore wind sites with sufficiently high wind velocity is expected to take centre stage in the next 2–3 years. Wind sites with low wind velocity make the investment unattractive to developers. Given the current situation, repowering as an investment option, which has already seen favourable response in countries like Germany and Denmark, would start maturing in India. This paper analyzes the present situation of the wind energy in India, evaluates the different wind energy market segments including repowering market, provides financial highlights of the repowering concept and ends with concluding remarks on major triggers which can set this concept in motion.     

基于电池储能系统和双重扩展卡尔曼滤波的风能发电智能调度技术研究

风能等新能源发电系统在供电体系中的占比越来越大,但其随机性和波动性问题,将风力发电厂输出的电力直接向电网调度会造成安全隐患。为了解决这一问题,基于电池储能系统提出了一种风能发电智能调度技术,该技术以风力发电动力学模型和电池储能系统状态模型为基础,利用双重扩展卡尔曼滤波算法实现了风能发电系统的稳定输出。以某地风速实测数据和电网需求功率为参考,对不同算法的输出功率预测值进行了仿真分析和实验对比。结果表明：提出的改进算法预测的风速值误差相比于传感器观测值平均误差降低了28%以上,可以更准确地提供发电系统输出功率;提出的智能调度技术可以使电压波动幅度降低60%以上,系统整体输出功率稳定在参考功率附近,误差不超过2%,有一定的实用意义。     

Environmental issues associated with wind energy – A review

Recognized as one of the most mature renewable energy technologies, wind energy has been developing rapidly in recent years. Many countries have shown interest in utilizing wind power, but they are concerned about the environmental impacts of the wind farms. The continuous growth of the wind energy industry in many parts of the world, especially in some developing countries and ecologically vulnerable regions, necessitates a comprehensive understanding of wind farm induced environmental impacts. The environmental issues caused by wind farms were reviewed in this paper by summarizing existing studies. Available mitigation measures to minimize these adverse environmental impacts were discussed in this document. The intention of this paper is to provide state-of-the-art knowledge about environmental issues associated with wind energy development as well as strategies to mitigate environmental impacts to wind energy planners and developers.     

Renewable energy policy and landscape management in Andalusia,Spain: The facts

Renewable energy has developed spectacularly in Spain since the European Union started a process of energy policy reform. A review of Spanish State legislation on renewable energies confirms that the success in installing renewable energy is attributable to public aid. Andalusia is one of the autonomous communities, which has simultaneously developed the legal framework and very successfully implemented the introduction of renewable power. When implementing the central government’s policy, the Andalusian regional government prioritised increases in both surface cover by wind and solar plants (thermal and photovoltaic energy) and in the number of companies involved. However, this development of renewable energies took place without any proper integration into regional spatial and landscape planning. This paper explores renewable power implementation in Andalusia through regulatory measures put in place over the last decade to develop renewable energy systems and the way they can be managed alongside planning issues. The location of large-scale renewable plants has had consequences for territory in the socio-political context of renewable energy promotion. The main findings focus on renewable energy plant sprawl throughout rural areas in Andalusia with no clear effect on landscape management and no firm backing from the local population.     

风能利用和研究综述

近年来,由于各国对新能源的普遍关注,风力发电发展迅速.本文在综合相关资料的基础上,总结了世界风能资源及各国风电发展的现状,提出了风电发展中的一系列技术问题和研究方向,并展望风力发电的前景.     

Wind energy in Egypt: Economic feasibility for Cairo

Motivated by the rise of the electricity tariffs applied on industrial customer and the frequent electricity cut offs recently experienced in Egypt, this paper assesses the economic feasibility of installing a stand alone wind energy technology by an industrial customer who seeks to reduce his dependency on the national grid. For this purpose, the wind energy potential at the wind regime of Cairo was chosen to be assessed using half an hour wind speed data for a full one-year period (2009). The Weibull parameters of the wind speed distribution function were estimated by employing the maximum likelihood approach. The estimation revealed that Cairo has poor wind resources. Despite the poor resources, the financial analysis has shown that under certain parameters the wind project can prove to be financially viable. Thus harnessing wind energy through stand alone systems can help in meeting the industries electric power needs.     

Hybrid renewable energy systems for power generation in stand-alone applications: A review

It has become imperative for the power and energy engineers to look out for the renewable energy sources such as sun, wind, geothermal, ocean and biomass as sustainable, cost-effective and environment friendly alternatives for conventional energy sources. However, the non-availability of these renewable energy resources all the time throughout the year has led to research in the area of hybrid renewable energy systems. In the past few years, a lot of research has taken place in the design, optimization, operation and control of the renewable hybrid energy systems. It is indeed evident that this area is still emerging and vast in scope. The main aim of this paper is to review the research on the unit sizing, optimization, energy management and modeling of the hybrid renewable energy system components. Developments in research on modeling of hybrid energy resources (PV systems), backup energy systems (Fuel Cell, Battery, Ultra-capacitor, Diesel Generator), power conditioning units (MPPT converters, Buck/Boost converters, Battery chargers) and techniques for energy flow management have been discussed in detail. In this paper, an attempt has been made to present a comprehensive review of the research in this area in the past one decade.     

Innovation and the price of wind energy in the US

In the last ten years, the wind energy industry has experienced many innovations resulting in wider deployment of wind energy, larger wind energy projects, larger wind turbines, and greater capacity factors. Using regression analysis, this paper examines the effects of technological improvements and other factors on the price of wind energy charged under long-term contracts in the United States. For wind energy projects completed during the period 1999–2006, higher capacity factors and larger wind farms contributed to reductions in wind energy contract prices paid by regulated investor owned utilities in 2007. However, this effect was offset by rising construction costs. Turbine size (in MW) shows no clear relationship to contract prices, possibly because there may be opposing factors tending to decrease costs as turbine size increases and tending to increase costs as turbine size increases. Wind energy is generally a low-cost resource that is competitive with natural gas-fired power generation.     

Progress and recent trends in wind energy

Towards the end of 20th and beginning of the 21st centuries, interest has risen in new and renewable energy (RE) sources especially wind energy for electricity generation. The scientists and researchers attempted to accelerate solutions for wind energy generation design parameters. Our life is directly related to energy and its consumption, and the issues of energy research are extremely important and highly sensitive.In a short time, wind energy is welcomed by society, industry and politics as a clean, practical, economical and environmentally friendly alternative. After the 1973 oil crisis, the RE sources started to appear in the agenda and hence the wind energy gained significant interest. As a result of extensive studies on this topic, wind energy has recently been applied in various industries, and it started to compete with other energy resources. In this paper, wind energy is reviewed and opened for further discussion. Wind energy history, wind-power meteorology, the energy–climate relations, wind-turbine technology, wind economy, wind–hybrid applications and the current status of installed wind energy capacity all over the world reviewed critically with further enhancements and new research trend direction suggestions.     

Development of benchmark wind speed for Gharo and Jhimpir,Pakistan

This paper deals with the development of benchmark wind speed values for different regions at different height levels in Gharo – Keti bandar wind corridor in the south of Pakistan. Unavailability of reliable long term historical wind data had made many uncertainties to project development activities because of unsteady nature of wind. This situation has resulted in realizing the importance of development of the benchmark wind speed values for the development of wind energy sector in Pakistan. Thus Government of Pakistan has introduced an innovative concept of Wind Risk by guaranteeing the wind speeds as given in benchmark wind speed table and has consequently diluted the financial risks of project developers involved in execution of wind power projects in Pakistan. Developing countries that do not have long term wind data, can be benefited from this study to establish wind energy in their country on fast track basis by pursuing same path. This will lead to the creation of new wind energy markets in the world.