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首页三轴行星齿轮箱驱动的风力发电机控制分析与功率分配
本文探讨了带有动力分段传输系统的风力发电机组控制分析,该系统通过三轴行星齿轮箱实现。这种设计旨在优化风能转换效率,提高电力输出的灵活性。作者张、李和杜分别来自江苏大学、 Chemnitz理工大学机械工程学院以及大众汽车公司的CAE方法部门,他们在2005年4月24日提交了初稿,并于2006年1月6日经过修订后接受发表。 文章的核心内容聚焦在一种特殊的风力涡轮机结构上,其特点在于输入轴由风力发电机的转子驱动,输出轴则通过主发电机(异步发电机)与电网相连,而第三个轴则由一个可变速度的控制电机驱动。这种设计允许风力发电机根据需要调整转速,从而实现功率的动态分配和优化利用。 研究者首先构建了风力涡轮机各子系统的动态模型,包括旋转气动学、传动系统动力学和电力生成单元的动力学。这些模型是在工作点上进行了线性化处理,以便于在多学科动力学框架下进行集成和仿真分析。线性化处理简化了复杂系统的行为理解,有助于开发精确的控制器,确保风力发电机组在各种运行条件下保持稳定并最大化效率。 此外,文中可能涉及对变桨变速控制策略的研究,这种策略是现代风力发电技术的关键部分,它能够根据风速变化实时调整叶片角度和发电机转速,以最大化能量捕获和减少风阻。通过动力分段传输,还可以实现对电网的适应性连接,提供更稳定的电力输出,减少对电网的冲击。 这篇文章提供了深入的洞察,揭示了如何通过创新的机械结构和控制系统设计,提高风力发电的性能和可靠性,同时满足了可再生能源行业的环保和经济效益目标。通过这个研究,读者可以了解到风力发电系统中的关键控制技术和设计决策,为风能产业的进一步发展提供了有价值的技术参考。
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Control analysis of the wind turbine with transmission
to split power
T Zhang
1
,WLi
2
, and YDu
3
1
Jiangsu University, Zhenjiang, People’s Republic of China
2
Department of Mechanical Engineering, Institution of Construction and Propulsion Engineering, Chemnitz University
of Technology, Chemnitz, Germany
3
CAE-Methods Volkswagen AG, Wolfsburg, Germany
The manuscript was received on 24 April 2005 and was accepted after revision for publication on 6 January 2006.
DOI: 10.1243/09576509JPE187
Abstract: In this article, a wind turbine with power splitting transmission, which is realized
through a three-shaft planetary gearbox, is presented. The input shaft of the transmission is
driven by the rotor of the wind turbine, the output shaft is connected to the grid via the main
generator (asynchronous generator), and the third shaft is driven by a control motor with
variable speed. The dynamic models of the subsystems of this wind turbine, e.g. the rotor aero-
dynamics, the drive train dynamics, and the power generation unit dynamics, were given and
linearized at an operating point. These submodels were integrated in a multi-disciplinary
dynamic model, which is suitable for control syntheses to optimize the utilization of wind
energy and to reduce the excessive dynamic loads. The important dynamic behaviours were
investigated and the suggestions to design a suitable control system were given.
Keywords: variable speed wind turbine, renew energy, mechatronic control model, power
splitting transmission
1 INTRODUCTION
The power generation with wind turbines has grown
during the past 20 years. The customers who are
environmentally conscious have now been using
this clean wind energy from power providers. The
global market for the electrical power produced by
the wind turbine generator has been increasing stea-
dily, which directly pushes the wind power techno-
logy into a more competitive area [1]. However, in
recent years, many wind turbines were incapacitated
because of the damage caused by excessively high
dynamic loads from the strong fluctuations of the
wind speed. Several solutions have been presented
to reduce the dynamic loads and to utilize the wind
energy more effectively. To reduce the dynamic
loads, wind turbines, which use the asynchronous
generator at constant rotor speed, were discussed
in reference [2]. Later, the wind turbines at variable
speeds are investigated by many researchers [3–8].
There are two important structures for the variable
speed wind turbines. The first structure consists of
a fixed ratio transmission and a variable speed gene-
rator. The generator is usually connected to the elec-
trical supply system through a rectifier and an
inverter. The main disadvantages of these solutions
are the high cost of electronic hardware, off-setting
the main objectives of increased cost-effectiveness,
a loss of 5–10 per cent in the energy output caused
by the rectification and inversion of all generated
power, and the harmonics generated by the elec-
tronic conversion induce electrical noise in the elec-
trical grid [5]. To overcome these disadvantages, a
new transmission technology was applied, which
splits the power into the main induction generator
and a control motor. By adjusting the torque of the
control motor, the speed of the main induction
generator can be always run at a desired constant
speed to maximize the capture of the wind energy,
although wind speeds are strongly variable. This
Corresponding author: Department of Mechanical Engineering,
Institution of Construction and Propulsion Engineering,
Chemnitz University of Technology, Reichenhainer Str. 70, Zi. A 317,
Chemnitz 09126, Germany. email: wenyong.li@mb.tu-chemnitz.de
415
JPE187
#
IMechE 2006 Proc. IMechE Vol. 220 Part A: J. Power and Energy
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