共查询到20条相似文献,搜索用时 109 毫秒
1.
2.
3.
4.
本研究属863计划"兆瓦级绕线式双馈异步发电机研制"课题。本文分析了兆瓦级绕线式双馈异步发电机的总体结构,提出了总体设计方案及参数,考虑了兆瓦级变速恒频风电机组的总体协调以及发电机与控制系统、励磁系统、冷却系统的协调,完全满足风力发电机组的运行要求及兆瓦级风力发电机国产化的需求,达到国内领先水平。 相似文献
5.
6.
7.
详细归纳了不同类型风力发电系统的暂态仿真模型,研究了包括空气动力系统、风机轴系系统、桨距控制系统和变频器在内的动态仿真模型,以双馈风力发电机为例,研究了变桨距恒频/变速风力发电系统的控制系统模型。最后,在电力系统分析软件DigSILENT PowerFactory上分别对异步风力发电机、双馈风力发电机和全换相同步风力发电机进行建模,模拟变风速条件下不同类型风力发电机的动态特性。仿真结果进一步验证了所研究模型的正确性。 相似文献
8.
双馈风力发电机在国内外的风力发电实际应用中逐渐取代同步发电机和笼型异步发电机,由于风力发电并网时出力的随机波动性,给配电系统的电压无功带来了很大的影响。考虑双馈风力发电机自身的无功输出特点,研究了SVG在其电压无功控制时的应用,详细探讨了SVG并网时的关键技术点,包括控制结构模型、容量的选取以及主要参数的确定。通过IEEE9节点的配电网络数据,在PSCAD中进行实例仿真,验证了所提出方法的有效可行性,为SVG在双馈风力发电系统电压无功控制中的应用提供了依据。 相似文献
9.
10.
兆瓦级风力发电机综述 总被引:2,自引:0,他引:2
阐述了风力发电机的组成及设计思想;介绍了新型兆瓦级风力发电机产品,如双馈异步、永磁和电励磁同步及直接驱动等发电机,为我国自主研制风力发电系统提供有价值的参考。 相似文献
11.
风能技术可持续发展综述 总被引:1,自引:0,他引:1
文章介绍了我国风电发展的现状和长期规划。综合分析了风电技术可持续发展中的重点问题,如风能资源评估、风电机组技术的发展趋势、风电并网关键问题、海上风电场建设、风能与其他能源组成互补系统以及风电直接应用与大规模蓄电相组合等。随着风电机组技术水平的不断提升,风电机组发展趋势为:单机容量不断提高、风电机组型式多元化、风电机组关键部件技术不断发展、风电机组设计技术趋向成熟、风电机组制造技术智能化、风电机组可利用率不断提高。 相似文献
12.
13.
随着大容量风电场集中接入电网,有必要研究含不同风电机组参数和类型的风电场暂态特性及对电网的影响。在分析笼型异步和双馈异步风电机组暂态模型的基础上,分别建立了含不同风电机组的风电场容量加权等值模型。从风电机组不同容量比、风电场不同短路容量比以及电网联络线不同阻抗比角度,对含不同风电机组的风电场暂态运行特性进行仿真。仿真结果表明:在电网接受风能容量一定的条件下,双馈异步风电机组装机容量比例提高以及风电场短路容量比和联络线阻抗比的降低,都可以提高和改善风电场出口处电压和机组的暂态稳定性。 相似文献
14.
The development of a wind turbine generator system in Japan is regarded as a promising source of clean energy, and its popularization is rapidly increasing. In Japan, there are many wind turbine generator systems installed on the Sea of Japan coast, with large wind capacity. However, since the Sea of Japan coast is a region with abundant winter lightning, a phenomenon peculiar to Japan, the wind turbine generator systems are subject to damage from winter lightning. Thus, it is important to observe the lightning currents striking wind turbine generator systems in order to provide lightning protection. The authors therefore installed currents sensors (Rogowski coils) on wind turbine generators installed in Hokkaido and Kagoshima Prefectures, and performed waveform observation of lightning stroke current in the winter of 2002 and the summer of 2003. These observations yielded a few current waveforms for lightning striking wind turbine generators. This paper describes the investigation and presents the observation results. © 2006 Wiley Periodicals, Inc. Electr Eng Jpn, 157(4): 40– 47, 2006; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20250 相似文献
15.
The depletion of fossil fuel and advancement in technology have made the wind generation as one of the important renewable energy source. With lot of wind generation systems added to the grid, issues related to the integration of wind generation with grid are also increasing. One such problem is grid instability due to multiple wind generation systems getting isolated from the grid during fault. In order to improve grid stability, wind energy systems are expected to ride-through the disturbances in the grid, called as fault ride-through capability. In this paper, the fault ride-through capability of an induction generator based wind generation system is estimated in terms of critical clearing time (CCT). A comparative study on determination of CCT using approximate steady state model and transient model of squirrel cage induction generator has been done. It was observed that when operating slip is high, CCT is same for both the cases while it differs significantly at lower operating slip values. A method has been proposed to improve the fault ride-through capability of induction generator based wind generation system using dynamic voltage Restorer (DVR). Simulation studies have been done on a grid connected squirrel cage induction generator based wind generation system and the results are presented. 相似文献
16.
风力发电机及其控制系统的对比分析 总被引:2,自引:0,他引:2
文章通过对风力机特性的分析,指出风力发电的主流控制方式是变速恒频控制方式;对几种常见的风力发电机及具控制系统进行了简单的描述,并做了对比分析。 相似文献
17.
18.
对目前流行的风力发电机组控制系统进行对比分析.在简述风力机特性的基础上,介绍了定桨距和变桨距发电机组的特点,重点分析了基于双馈发电机的变速恒频发电系统及桨叶节距角控制系统.讨论了未来风力发电控制技术的发展趋势和应用前景. 相似文献
19.
20.
Mamoru Kimura Kazumasa Ide Kazuo Nishihama Motoo Futami Masaya Ichinose Tetsuo Fujigaki Motonobu Iizuka Kazuhiro Imaie Yasuomi Yagi Jyunji Tamura 《Electrical Engineering in Japan》2007,161(1):51-57
This paper focuses on selection of wind turbine generation systems that include generators, converters, and gears. We study three systems: a permanent magnet generator (PMG) system, a doubly‐fed generator (DFG) system, and a synchronous generator (SYG) system in terms of the system efficiencies and running costs. The system efficiencies and running costs are calculated by considering the relationship between wind power and wind conditions. According to these results, the one‐step gear PMG system is the best choice for a large wind turbine system. © 2007 Wiley Periodicals, Inc. Electr Eng Jpn, 161(1): 51–57, 2007; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20506 相似文献