我国风力发电设备制造业发展战略

在世界范同内,风电产业出现突飞猛进的发展势头,为风电装备制造业提供了广阔的市场.文章分析了我国风电装备制造业所面临的形势和挑战,提出了风电设备制造业应发挥政策法规的促进作用、加强自主研发能力和制造能力、把握世界风电设备发展趋势和发挥本土企业低成本优势的战略和建议.     

山地风力发电设备安全安装技术要点分析

为实现山地风力发电设备低成本、高效的安全安装,本文以实际工程为例,分析了山地风力发电设备安全安装的难点,主要体现在风力发电机组的安装技术难度大、山地施工条件恶劣。并从施工工序安排、吊装平台处理及吊车选择、关键组件的吊装三方面进行分析,总结了山地风力发电设备安全安装技术要点,以期为山地风力发电设备安全安装提供一定的参考与借鉴。     

国电龙源与西班牙Gamesa签署风力发电采购合同

9月13日,国电龙源电力集团公司与西班牙Gamesa公司签署了510MW风电设备(共计601台850kW风机)采购合同。这是亚洲地区迄今最大规模的风电设备采购项目,主要用于黑龙江伊春耳朵眼     

风力发电的战略研究

本文介绍风力发电的国内概况、国外发展风力发电的经验及我国开发风力发电的技术对策.提出了近期风力发电应以解决生活用电为主.风力机应以小型、网外独立运行为主的原则.     

风力发电的现状与进展

综述国内外风电发展的现状,各国风机的装机容量,未来世界风电的发展趋势以及风力发电的成本。我国虽然风机总装机容量已达1200MW,但其所占比例还很小,需大力扶持与发展。     

2012年世界光伏电池、风电设备发展现状与趋势

美国、欧洲风力和光伏发电量占总发电量的比例上升。2012年上半年．德国光伏发电所占比例超过5％、风力发电接近10％。欧美的光伏发电设备无法与中国产廉价设备竞争。欧洲电费上涨对家庭和产业的影响也很大。在光伏发电设备市场,以中国厂家为主的供应持续过剩。     

完善我国风力发电政策的思考

风能是取之不尽的、清洁无污染的可再生资源。世界上风力发电技术的发展突飞猛进,风力发电是近几年逐渐形成的朝阳产业。有的国家风力发电量已占总发电量的一定份额。在我国大力提倡落实科学发展观,构建和谐社会,建设资源节约型社会的当前。从政策上保证风力发电事业的健康发展是十分必要的。文章简述了发展风电的优势及其在国内外的发展情况,指出了影响我国风电发展的某些政策弊端,提出了完善和优化我国风力发电政策的建议。     

基于状态评价的风力发电设备故障诊断系统的研制

基于状态评价的风力发电设备故障诊断系统,通过实时监控表征风力发电设备运行情况的状态量,依据风力发电设备状态评价导则,对风力发电设备进行状态评价,并依据状态评价的结果,对潜在故障进行诊断分析。同时给出相应的运维策略,通过早期故障预测,变事后维护为事前检修,科学合理地安排检修计划,极大地提高了风力发电设备的运维效率,降低了机组的维护成本,保证了风力发电机组的可靠稳定运行。依据此方法研制的风力发电设备故障诊断系统,已成功应用于南方电网超高压输电公司检修试验中心。实践证明,该方法有效地提高了风力发电设备故障诊断的实时性与准确性。     

地域、季节和气候对风力发电设备的影响

通常风力、气候及外部电力对风力发电设备运行的影响被称为风力发电设备外部工作条件。其中气候因素对风力发电设备故障的影响,是由风力发电设备在野外露天工作的特殊环境所造成的。在各种气候因素中,闪电、冰冻和暴风是风力发电设备发生故障和损坏的主要因素。     

上海地区开发风力发电的必要性

上海电网目前基本上是纯火电电网,单一的电源结构难以满足上海市用电需求和电力系统可持续发展的战略要求。因此,开发利用可再生能源一风力资源来发电,替代部分煤电,适当减轻能源对外依靠的压力,对改善上海市的电源结构和走能源可持续发展的道路是十分必要的。上海地区江海岸线总长约450km,沿江地区年平均风速高,风力资源丰富,具有较高的开发价值,而且沿岸地势平坦,滩涂广阔,为大规模开发风力发电提供了良好的条件。     

风电机组车载移动测试台设计方法

在大型风力发电机组生产过程中,需对主传动系统进行模拟运行,以测试其装配质量。为此,设计了一种移动式风电机组测试台。研究和解决了驱动电机功率选择、动力传动设计以及设备与机组的兼容连接等关键技术问题。使用风电机组车载移动测试台,可提高风机出厂试验的检测效率,降低风机现场运行的风险。     

The effect of spatial dispersion of wind power plants on the curtailment of wind power in the Greek power supply system

To meet the national target of 29% for electricity production from renewable energy sources by 2020 in Greece, effective implementation of massive wind power installed capacity into the power supply system is required. In such a situation, the effective absorption of wind energy production is an important issue in a relatively small and weak power system such as that of Greece, which has limited existing interconnections with neighboring countries. The curtailment of wind power is sometimes necessary in autonomous systems with large wind energy penetration. The absorption or curtailment of wind power is strongly affected by the spatial dispersion of wind power installations. In the present paper, a methodology for estimating this effect is presented and applied for the power supply system of Greece. The method is based on probability theory, and makes use of wind forecasting models to represent the wind energy potential over any candidate area for future wind farm installations in the country. Moreover, technical constraints imposed by the power supply system management, the commitment of power plants and the load dispatch strategies are taken into account to maximize the wind energy penetration levels while ensuring reliable operation of the system. Representative wind power development scenarios are studied and evaluated. Results show that the spatial dispersion of wind power plants contributes beneficially to the wind energy penetration levels that can be accepted by the power system. Copyright © 2009 John Wiley & Sons, Ltd.     

Current situation and development of wind power in China

The current development of wind power in China was presented in this paper. Many regions such as Xinjiang Uygur Autonomous Region, Inner Mongolia Autonomous Region and southeast coastal region, etc. in China have abundant wind energy resource. At the same time, the utilization of wind power in China has been developing quickly and its prospect is promising in spite of many some obstacles. With the implementation of the Renewable Energy Law, some previous obstacles have been or are being eliminated. Much investment and many enterprises start to enter this field. In spite of this, there still exist some financial and technological obstacles. One of the technological obstacles is the stability of local power grid owing to the increasing proportion of the wind power capacity. Because the centralized development mode of wind power was adopted, the quick fluctuation of wind speed will influence the voltage and frequency stability of local power grid. In addition, large wind farm has little dispatching ability because of the uncontrollability, randomness and fluctuation of natural incoming wind. To erase these obstacles, a novel hybrid power system combining wind farm and small gas turbine power plants is discussed.     

风电场微观选址及发电量预测的探讨

对风资源评估、选址地面情况和风机位置的排布等影响风电场微观选址的因素进行了分析.阐述了风电场发电量的预测方法,通过实例说明如何使用相关软件来预测风电场发电量,并根据预测结果对风电场微观选址注意事项进行了探讨.     

A new formulation for rotor equivalent wind speed for wind resource assessment and wind power forecasting

The spurt of growth in the wind energy industry has led to the development of many new technologies to study this energy resource and improve the efficiency of wind turbines. One of the key factors in wind farm characterization is the prediction of power output of the wind farm that is a strong function of the turbulence in the wind speed and direction. A new formulation for calculating the expected power from a wind turbine in the presence of wind shear, turbulence, directional shear and direction fluctuations is presented. It is observed that wind shear, directional shear and direction fluctuations reduce the power producing capability, while turbulent intensity increases it. However, there is a complicated superposition of these effects that alters the characteristics of the power estimate that indicates the need for the new formulation. Data from two field experiments is used to estimate the wind power using the new formulation, and results are compared to previous formulations. Comparison of the estimates of available power from the new formulation is not compared to actual power outputs and will be a subject of future work. © 2015 The Authors. Wind Energy published by John Wiley & Sons, Ltd.     

我国风电设备市场扩散模型与预测研究

近年来,我国风电产业发展迅速,也面临着发展过快、产能过剩和政策调控等问题。文章针对我国风电设备市场扩散模型选择及产业发展趋势进行了研究。以Gompertz模型预测我国风电产业的发展趋势:2010年是风电产业发展的起飞点,此后的17年是产业发展的成长期,2027年后进入产业成熟期,按照这种发展速度,当前存在着风电设备产能过剩现象。政府应在角色定位、政策实施和产业链构建等方面予以调整。     

厄立特里亚风能资源、电力需求及其适宜的风力机组

分析了厄立特利亚东部红海低地、中部山区高原和西部低地三个地区的风能资源.采用当地的全年风速数据比较了各个地区的风能潜力.根据目前和未来若干年的用电状况预测了各地区的电力需求.也对厄立特里亚政府的风能鼓励政策和与文化背景有关风险提示作了介绍.研究表明,在厄立特里亚东南部地区存在可观的风能资源并且当地也具有电力需求.估计年发电量在2 GWh,相当于全年满负荷运行2 500 h,当地可以安装大量风力机组,全部发电量将超出厄立特里亚全国在可预见的将来的用电量.风速8m·S-1的低速机组是最适合该地区的风电机组.     

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。