5年来全球风电增长迅猛

从2005～2010年间,世界风电都以年均40%的速度增长,据《全球风能展望2010》报告预测,到2020年全球风电装机容量将达到10亿kW,可满足全球12%的电力需求。据全球风能协会统计,到去年底全球约有67万人在与风电有关的各领域工作,其产值也已达到5000亿美元。     

海外

正2013年美国风电在电力消费中占比首次超过4%2014年3月7日消息,据美国风能协会统计,2013年,美国风电在整个电网占比中的比例首次超过4%。虽然过去一年,美国风电新增装机量大幅下滑,但是业内预计2014年这一形势将有所有所好转。美国各州的风电分布情况依然差别很大,有些州远远领先于其他地方。美国能源部能源信息管理局的统计数据显示,在爱荷华州和南     

2020年风电将进入每个欧洲家庭

来自格拉德哈森集团的研究者在考察了欧洲的风速、海深和经济基础、设施以及风电场技术条件后得出结论:欧洲沿海能建设5万座风机电站,足以为1.5万个家庭提供电力。该报告预言欧洲的风电工业将会得到巨大发展,其中德国、英国、荷兰、法国和西班牙将建设大型风电项目。建成这些风电能满足整个欧洲1/3的电力需求,其总量与整个欧洲核电持平。研究者称,到2020年欧洲风电将创造300万个就业机会,重振衰退和不景气的行业,创造一个巨大的新能源市场,使欧洲走向完全使用清洁能源供应系统之路,从而结束风电不能大规模发电的疑虑。2020年风电将进入每个…     

2020年风电装机有望达2亿kW

近日发布的《中国风电发展路线图2050》显示,到2020年我国风电装机容量将达到2亿kW,将满足5%的电力需求。2030年和2050年将分别达到4亿kW和10亿kW,分别满足届时8%和17%的电力需求,二氧化碳减排量将分别达到6亿t和15亿t。由国家发展和改革委员会能源研究所与国际能源署联合国内有关机构实施的该路线图,在2011北京国     

5年来全球风电增长迅猛

从2005～2010年间,世界风电都以年均40%的速度增长,据《全球风能展望2010》报告预测,到2020年全球风电装机容量将达到10亿kW,可满足全球12%的电力需求。据全球风能协会统计,到去年底全球约有67万人在与风电有关的各领域工作,其产值也已达到5000亿美元。     

龙源电力公布2010年度业绩

<正>2011年3月16日,龙源电力集团股份有限公司(股票代码:00916)在香港召开2010年度业绩发布会,董事长朱永芃出席会议并致辞,执行董事、总经理谢长军介绍龙源电力2010年经营业绩。2010年,龙源电力风电控股发电量达100.94亿kWh,同比增加62.5%;风电售电收入达人民币46.13亿元,比2009年的人民币27.52亿元增加人民币18.61亿元,增幅67.6%。在过去的1年里,龙源电力调整风电开发战     

巴基斯坦风电蹒跚前行

<正>身为发展中国家的巴基斯坦,随着经济的发展,对能源的需求也是水涨船高。近来,由于电力的严重匮乏,加上能源基础设施建设不完善,巴基斯坦在可再生能源领域的探索也吸引了不少关注,而这其中,风电产业最受欢迎。事实上,巴基斯坦发展风电的"先天条件"很好。首先,由于经济的发展,巴基斯坦目前正面临着严重的电力短缺问题。其次,巴基斯坦境内的许多地方,风力资源条件很好,比如Sindh省     

变压器经济运行方式的探讨

随着电力变压器性能的发展,适合于老式变压器的一些节能措施例如小容量变压器只有接近满载后才应转运大容量变压器,一台变压器只有接近满载后才应改为2台并列运行,变压器的效率最高点在75%左右,以及把30%以下的负载运行称为"大马拉小车"等,已经不能适用.通过分析计算,确定了这些措施新的临界值,可供相关用户参考.     

美国强调扩大国内风力发电

<正>ENECO,2014,47(10):94美国能源部公布两项强调扩大国内风力发电产业的报告。风力发电是美国国内可全部有效利用的能源,在奥巴马政府的能源战略中占重要地位。首先,根据《2013年度风力发电技术市场报告》,2013年度国内风力发电装机容量缓慢增加,达到61GW(年均电力需求的4.5%),风能价格创历史最低纪录。超39个州(准州)设置实用规模的涡轮机。风电产业扩大给美国经济带来利好,带动出口和关联产业增长,     

保加利亚政府暂停40%风电与光伏发电项目

2013年3月28日,据可再生能源杂志报道,保加利亚有可能暂停40%的风电和光伏发电装机项目,以缓解该国政府所说的产能过剩困境,并稳定电力生产。保加利亚能源部长Asen Vasilev在保能源部官网上的一份文件里提到:"大约有40%的风电和光伏发电开发商没有向保加利亚中央电力调度系统     

风电系统的无功功率与电网电压稳定

论述了风电容量在占局部电网相当比例时,风电机组的无功功率调整与电网电压之间的关系,对于定速和变速风电机组的运行特性做了分析,提出了在需要做无功功率调整时风电机组应能满足的特殊要求。     

New energy power generation-wind power generation

This paper introduced the status quo of wind power and wind power generation technology. Focusing on the introduction of wind power generating system ibrational self-consistent field（VSCF）, program implementation included Alternating Current （AC）-Direct Current （DC）-AC conversion system, magnetic field modulation generator system, doubly-fed generator system etc. Among these, doubly-fed generator system is the trend. Where to build the wind farm is very important, so a perfect site is needed. Wind power generation will have a bright future. As long as the wind power can be linked to the grid in large scale.     

Output power control for large wind power penetration in small power system

Nowadays, wind turbine generator (WTG) is increasingly required to provide control capabilities regarding output power. Under this scenario, this paper proposes an output power control of WTG using pitch angle control connected to small power systems. By means of the proposed method, output power control of WTG considering states of power system becomes possible, and in general both conflicting objectives of output power leveling and acquisition power increase are achieved. In this control approach, WTG is given output power command by fuzzy reasoning which has three inputs for average wind speed, variance of wind speed, and absolute average of frequency deviation. Since fuzzy reasoning is used, it is possible to define output power command corresponding to wind speed condition and changing capacity of power system momentarily. Moreover, high performance pitch angle control based on output power command is achieved by generalized predictive control (GPC). The simulation results by using actual detailed model for wind power system show the effectiveness of the proposed method.     

Output power variations with solar power satellites

The first comprehensive evaluation of output power variations expected from Solar Power Satellites is presented. The various factors are classified in a two tier manner as: deterministic (either periodic or non-periodic) and statistical (either constant with system life or changing with life). The largest variations are due to seasonal periodic factors, namely variations in the solar constant (± 3.3 per cent) and a solar illumination variation with the photovoltaic array held perpendicular to the orbit plane (± 4.2 per cent). Other key factors delineated which are being quantified presently include power reductions due to microwave power tube failure and silicon solar cell radiation damage, while multiple shadowing of adjacent power stations in geosynchronous orbit and rectenna structural factors and combining efficiency variations are representative of areas that need further study.     

Microthermophotovoltaic power generator with high power density

A promising energy source for portable MEMS devices, microthermophotovoltaic (micro-TPV) power generator, is described in this paper. The system mainly consists of a micro SiC combustor, and a GaSb photovoltaic (PV) cell array and a simple nine-layer dielectric filter, with a volume of about 3.1 cm³. When the flow rate of H₂ is 4.2 g/h, and H₂/O₂ ratio is 0.7, the system is able to deliver 3.06 W electrical power, the open-circuit voltage and short-circuit current are 2.31 V and 1.74 A, respectively, the result is a power density of about 1.0 W/cm³ (1 MW/m³). The effect of all kinds of factors on the performance of the micro-TPV system is also discussed in this paper.     

Wind power and market power in competitive markets

Average market prices for intermittent generation technologies are lower than for conventional generation. This has a technical reason but can be exaggerated in the presence of market power. When there is much wind smaller amounts of conventional generation technologies are required, and prices are lower, while at times of little wind prices are higher. This effect reflects the value of different generation technologies to the system. But under conditions of market power, conventional generators with market power can further depress the prices if they have to buy back energy at times of large wind output and can increase prices if they have to sell additional power at times of little wind output. This greatly exaggerates the effect. Forward contracting does not reduce the effect. An important consequence is that allowing market power profit margins as a support mechanism for generation capacity investment is not a technologically neutral policy.     

A hybrid power source for pulse power applications

Portable 12 V power supplies are used extensively for communications and power tool applications. These devices demand fast response times of the power supply. Fuel cells are generally best suited to continuous power applications and require an initial warm-up period, although they offer the prospect of increased operational duration over a battery for a given weight of portable system. This paper investigates the combination of specific energy performance from the fuel cell system with the specific power and response time of the battery. Two separate hybrid systems have been developed and tested; a planar, 20-cell, polymer electrolyte membrane fuel cell (PEMFC) stack together with either a lead–acid or nickel/cadmium battery; and a conventional 20-cell, bipolar, PEMFC stack. Both systems have been tested under pulse-load conditions at temperatures between −20°C and +40°C, and for comparison, the individual components have undergone similar tests. The hybrid systems have successfully operated continuously for several weeks under load profiles that the fuel cell alone could not sustain.     

Got power? [power engineers recruitment]

This paper discusses the different factors that can help to ensure that the future demand for power engineers will be met. These factors include the articulation of a compelling mission, development of a comprehensive strategy, execution of supporting tactics, and demonstration of leadership.     

Modeling market power in Korea's emerging power market

The Korean power market is being formed from the unbundled generation, transmission and distribution assets of Korea Electric Power Corporation. The KEPCO generation has been allocated to six independent gencos with a combined generating capacity of 46,629 MW in 2002. This gave an 11% margin over the peak load that year (41,921 MW).     

Environmental/economic power dispatch with wind power

Economic environmental dispatch (EED) is a significant optimization problem in electric power system. With more wide spread use of wind power, it is necessary to include wind energy conversion system (WECS) in the EED problem. This paper presents a model to solve the EED problem incorporating wind power. In addition to the classic EED factors, the factors accounting for overestimation and underestimation of available wind power in both economic and environmental aspects are also considered. In order to obtain some quantitative results, the uncertain characteristic of available wind power and the performance of WECS are determined on the basis of the statistical characteristic of wind speed. The optimization problem is numerically solved by a scenario involving two conventional generators and two wind-powered generators. The results demonstrate that the allocation of system generation capacity may be influenced by multipliers related to the cost for overestimation and underestimation of available wind power, and by the multiplier related to the emissions for underestimation of available wind power. Nevertheless, the multiplier related to the emissions for overestimation of available wind power has little impact on the allocation. Taking account of economic factors, environmental factors and impacts of wind power penetration, the proposed EED model is beneficial to finding the right balance between radical and conservative strategy for wind power development.