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Study-of-VSC-HVDC-Controller-
风电潮流的波动会引起并网系统公共连接点（PCC）电压的波动。在基于电压源换流
器的高压直流输电（VSC-HVDC）交直流混合风电场并网系统中，控制VSC-HVDC 送端站注入
到PCC 点的无功功率可以抑制电压波动。本文讨论了VSC-HVDC 的无功功率控制器和定电压控制
器抑制电压波动的原理。基于电磁暂态软件PSCAD/EMTDC 建立了并网风电场模型、VSC-HVDC
模型及控制系统模型。仿真结果表明VSC-HVDC 采用定电压控制器的并网系统能更好的抑制电
压波动，采用无功功率控制器的系统具有较好的风电场并网性能。(Reactive power variation of integration wind farm may cause point of common
coupling （PCC） voltage fluctuation. In hybrid wind farm integration system based on HVDC of
voltage source converter （VSC-HVDC）, the voltage fluctuation can be alleviated by compensating
reactive power to PCC from VSC-HVDC sending end. Therefore, the reactive power controller and the
stable voltage controller to alleviate voltage fluctuation are studied in the paper. The integration wind
farm, VSC-HVDC and their controller models are set up by PSCAD/EMTDC. The simulation results
show that the integration system adopted stable voltage controller has a better performance to alleviate
voltage fluctuation. However the system adopted reactive controller has a good wind farm integration
capability.)
- 2012-03-01 16:09:37下载
- 积分：1
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传感器网络
传感器网络由大量能量有限的微型传感器节点组成.因此,如何保证在足够覆盖监测区域的同时延长网络的寿命,是一个需要解决的重要问题.为了达到这一目标,一种广泛采用的策略是选出部分能够足够覆盖监测区域的节点作为工作节点,同时关闭其他冗余节点.提出了一个数学模型,使得只要已知监测范围和节点感知半径的比值,就可以计算出达到服务质量期望所需要的节点数量.需要指出的是:与大部分研究覆盖的文献不同,该研究不基于节点的位置信息,因此可以极大地降低硬件成本,并且减少节点获得和维护位置信息的开销.模拟实验结果表明:在随机部署条件下,服务质量期望与实验所得到的实际覆盖度的误差不大于服务质量期望的2％ 而对于相同的服务质量期望和实际覆盖度,计算所得的工作节点数量与实验所得的工作节点数量的误差小于计算数量的5％,这表明推导出的节点数量与服务质量期望之间的关系与模拟实验的结果相吻合.该结果可以广泛应用于传感器网络的节点部署、拓扑控制等领域中.()
- 2008-03-22 23:09:53下载
- 积分：1
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optimized_datacenter_cloud
说明： Towards an optimized abstracted topology design in cloud environment
- 2019-01-19 09:08:26下载
- 积分：1
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VSCF
变速恒频风力发电技术风力发电具有一些自身所拥有的特点，因此如何提高整个风力发电系统的效率、性能以及其输出电能质量，是当今风力发电研究的重点也是风力发电研究的发展方向。目前已有的风力发电技术主要有四类：定桨距调节技术、变桨距调节技术、主动失速调剂技术、变速恒频技术。因定桨距调节技术产生的时间比较早，并且现在的风力发电系统中不再使用因此不做详细介绍。(VSCF wind power generation technology)
- 2012-05-29 15:37:22下载
- 积分：1
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DOA-mode-space-smooth
基于模式空间的均匀圆阵方位估计性能研究，在建立了均匀圆阵数学模型的基础上，将模式空间与经典高分辨方位估计算法———多重信号分类法（MUSIC）
应用到均匀圆阵方位估计（DOA）中(Based on the pattern space DOA estimation with uniform circular arrays properties, in the establishment of a uniform circular array based on the mathematical model, the model space high resolution DOA estimation algorithm with the classic--- multiple signal classification (MUSIC) direction applied to the uniform circular array estimation (DOA) in)
- 2011-05-10 23:48:33下载
- 积分：1
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123456789
中国中小企业互联网应用状况调杳报告:
近几年，中国互联网应用市场一直保持着快速发展，在国民经济中的地位不断提升。一
方面，个人的互联网应用市场不断发展，截至2010年末中国网民规模已达4.57亿；另一方
面，企业的互联网应用市场也逐渐步入成熟，继企业内部信息化之后，互联网成为企业发展
的又一强劲推力，互联网已经被广泛应用于企业的营销销售、客户服务、办事办公等方面。(The Chinese small and medium-sized enterprise Internet application status of the report were: In recent years, China s Internet application market has been maintained a rapid development of the national economy of stature. a , personal Internet application market development, at the end of 2010 the scale of China s netizens has reached 457 million The other party Surface, enterprise Internet application market also gradually into mature, the enterprise internal information after, the Internet becomes the development of the enterprise And a strong thrust, the Internet has been widely used in enterprise)
- 2011-12-23 11:10:53下载
- 积分：1
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plane2
军用无人机方面的文章，对军事感兴趣的同学可以下载来看看(Military UAVs articles for students interested in the military can be downloaded to look)
- 2016-06-20 15:24:43下载
- 积分：1
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lid driven flow
Lbm用于模拟顶盖驱动流 强制对流 碰撞迁移过程(LBM for lid driven flow)
- 2021-03-31 22:39:08下载
- 积分：1
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ruchong
清华大学的蠕虫研究资料入门级别的，教你怎么写怎么防范，清华大学的蠕虫研究资料入门级别的，教你怎么写怎么防范(Tsinghua University worm entry-level research materials, and teach you how to write how to prevent, Tsinghua University worm entry-level research materials, and teach you how to write how to prevent)
- 2008-07-02 15:13:11下载
- 积分：1
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flying-control-law
概述了飞行控制律设计的几种主要方法。通过对比自适应飞行控制律和程序调参飞行控制律,总结
了处于飞行控制器设计领域主导地位的程序调参飞行控制律的主要优点和不足,并就程序调参技术在现代飞控领
域的研究现状及其在某先进飞机中的实际应用进行了介绍。最后,针对现代飞机的飞行特点,展望了程序调参飞
行控制律今后可能的发展方向。
(Summarizes the flight control law design of several major method. By comparing the adaptive flight control law and procedure parameters tuning flight control law is summarized The flight controller design field is in the leading position of the program and flight control law of the main advantages and disadvantages, and the process parameters tuning technology in the modern flight control broughtThe research status and domain in some advanced aircraft in the practical application are introduced in this paper. Finally, the modern aircraft s characteristics, and looks forward to the program and fly Line control law could in the future development direction.)
- 2012-02-24 13:24:30下载
- 积分：1
