本文分析了轻型直流输电VSC-HVDC的工作原理、数学模型和电网电压矢量定向VOC控制策略,推导了电流内环的前馈解耦机理。基于Matlab仿真平台,搭建了2000MVA的VSC-HVDC轻型直流输电仿真模型,实验结果表明通过PQ解耦,实现了潮流控制、无功控制和两不同频率的交流电网互联等。
2022-05-20 23:04:44
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关于matlab里的传统直流输电系统的建模与仿真，交流-直流-交流。整流逆变装置
2022-05-10 11:01:45
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HVDC and FACTS Controllers: Applications of Static Converters in Power Systems focuses on the technical advances and developments that have taken place in the past ten years or so in the fields of High Voltage DC transmission and Flexible AC transmission systems. These advances (in HVDC transmission and FACTS) have added a new dimension to power transmission capabilities. The book covers a wide variety of topics, some of which are listed below: -Current Source and Voltage Source Converters, -Synchronization Techniques for Power Converters, -Capacitor Commutated Converters, -Active Filters, -Typical Disturbances on HVDC Systems, -Simulation Techniques, -Static Var Compensators based on Chain Link Converters, -Advanced Controllers, -Trends in Modern HVDC. In addition to EHV transmission, HVDC technology has impacted on a number of other areas as well. As an example, a chapter dealing with HVDC Light applications is included providing recent information on both on-shore and off-shore applications of wind farms. HVDC and FACTS Controllers: Applications of Static Converters in Power Systems is meant for senior undergraduate, graduate students and professional power systems engineers. Mathematical treatment of the subject has been kept to a minimum and emphasis has been placed on principles and practical applications. Applications from major manufacturers are included to provide useable information for the practicing power systems engineer.
2022-05-01 20:51:55
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对含基于电压源型变流器的高压直流输电（VSC-HVDC）交直流混合系统进行机电暂态仿真研究。VSC-HVDC系统的外环功率、电压控制器采用PI控制，以产生内环电流参考值。针对dq同步旋转坐标系下VSC-HVDC交流侧数学模型不能精确解耦的问题，建立基于α β静止坐标系的VSC-HVDC数学模型，引入比例谐振（PR）控制改进了内环电流控制器，可以无静差跟踪内环电流信号。采用以上控制策略实现VSC-HVDC系统的精确解耦控制，并采用双时步仿真方法对VSC-HVDC系统的动态响应进行准确模拟。通过在新英格兰系统上进行仿真实验，验证了所提VSC-HVDC机电暂态控制模型的正确性和双时步混合仿真方法的有效性。
2022-04-28 14:48:06
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高压直流输电（HVDC）技术在过去的几十年中取得了巨大的成就。直流输电技术具有技术面广、技术含量高、综合性很强的特点，它不仅促进了电力电子技术的发展，而且伴随着电力电子器件、计算机技术的发展，新材料的出现，新能源和可再生能源的开发利用，一定会为电力工业的发展发挥更大的作用。首先介绍了高压直流输电(HVDC)技术的历史发展以及国内外现状，分析了高压直流输电系统的基本结构和元件，并总结了高压直流输电系统的运行特性。之后着重讨论了柔性直流输电，也就是基于电压源换流器的高压直流输电（VSC-HVDC)。分析了它的基本结构和工作原理，并运用Matlab软件建立了VSC-HVDC系统的仿真模型，通过对仿真结果的分析，验证了高压直流输电系统的适用性和合理性。
2022-04-27 19:44:01
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