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电网技术  2006 

一种利用VSC-HVDC提高发电机阻尼的新控制策略

, PP. 62-67

Keywords: 电力系统,交直流混合系统,VSC-HVDC,发电机阻尼,Bang-bang控制,混合调制,PI调节器

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Abstract:

在交直流混合输电系统中,可以利用直流系统的功率调制来提高交流系统的运行稳定性。文章在建立含有VSC-HVDC的交直流混合输电系统模型的基础上,提出了一种新的VSC-HVDC混合功率调制方法来提高发电机阻尼,该方法利用Bang-bang控制原理设计混合调制信号,并将其加入到常规的PI调节器中。仿真结果表明,加入混合调制信号可以增强系统的阻尼并有效地抑制振荡,能够改善系统在各种扰动下的动态性能。

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