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Coordinated Stability Control of Wind-Thermal Hybrid AC/DC Power System

机译：风热交流/直流混合动力系统的协调稳定控制

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摘要

The wind-thermal hybrid power transmission will someday be the main form of transmitting wind power in China but such transmission mode is poor in system stability. In this paper, a coordinated stability control strategy is proposed to improve the system stability. Firstly, the mathematical model of doubly fed wind farms and DC power transmission system is established. The rapid power controllability of large-scale wind farms is discussed based on DFIG model and wide-field optical fiber delay feature. Secondly, low frequency oscillation and power-angle stability are analyzed and discussed under the hybrid transmission mode of a conventional power plant with wind farms. A coordinated control strategy for the wind-thermal hybrid AC/DC power system is proposed and an experimental prototype is made. Finally, real time simulation modeling is set up through Real Time Digital Simulator (RTDS), including wind power system and synchronous generator system and DC power transmission system. The experimental prototype is connected with RTDS for joint debugging. Joint debugging result shows that, under the coordinated control strategy, the experimental prototype is conductive to enhance the grid damping and effectively prevents the grid from occurring low frequency oscillation. It can also increase the transient power-angle stability of a power system.
机译：风热混合动力输电将有一天成为中国风电的主要输电方式，但这种输电方式的系统稳定性较差。本文提出了一种协调稳定控制策略，以提高系统的稳定性。首先，建立了双馈风电场和直流输电系统的数学模型。基于DFIG模型和广域光纤延迟特性，讨论了大型风电场的快速功率可控性。其次，分析和讨论了传统风电场发电厂的混合传输模式下的低频振荡和功率角稳定性。提出了风热混合AC / DC电力系统的协调控制策略，并制作了实验样机。最后，通过实时数字仿真器（RTDS）建立了实时仿真模型，包括风力发电系统，同步发电机系统和直流输电系统。实验原型与RTDS连接以进行联合调试。联合调试结果表明，在协调控制策略下，该实验样机具有导电性，可以增强电网的阻尼，有效地防止电网发生低频振荡。它还可以提高电源系统的瞬态功率角稳定性。

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  • 来源
    《Mathematical Problems in Engineering》 |2015年第19期|591232.1-591232.9|共9页
  • 作者

    Yao Zhiqing; Hao Zhenghang; Chen Zhuo; Yan Zhiguo;

  • 作者单位

    Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, Wuhan 430074, Peoples R China;

    Guizhou Univ, Sch Elect Engn, Guiyang 550025, Peoples R China;

    Guizhou Univ, Sch Elect Engn, Guiyang 550025, Peoples R China;

    Qilu Univ Technol, Sch Elect Engn & Automat, Jinan 250353, Peoples R China|Qilu Univ Technol, Key Lab Pulp & Paper Sci & Technol, Minist Educ China, Jinan 250353, Peoples R China;

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