• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
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  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 21 Issue 3
Jun.  2008
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Article Contents
WANG Yuhong, LI Qunzhan, HE Xiaoqiong, GAO Shibin. Effects of DC Control Strategies on DC Power Transmission System Stability[J]. Journal of Southwest Jiaotong University, 2008, 21(3): 304-308.
Citation: WANG Yuhong, LI Qunzhan, HE Xiaoqiong, GAO Shibin. Effects of DC Control Strategies on DC Power Transmission System Stability[J]. Journal of Southwest Jiaotong University, 2008, 21(3): 304-308.

Effects of DC Control Strategies on DC Power Transmission System Stability

  • Received Date: 11 Dec 2007
  • Publish Date: 25 Jun 2008
  • DC(direct current) control strategy and its application in power transmission systems were analyzed,and constant current control(CCC) and constant power control(CPC) were compared in terms of their principles and implementation.Gao-Zhao(Gaopo in Guizhou to Zhaoqing in Guangdong) HVDC(high voltage DC) transmission system in China Southern Power Grid was taken as an example.Current controllers with different transfer functions were designed.Simulations were performed on the system stability of power networks,dynamic responses of current controllers and effects of DC modulation by CCC or CPC under the same parameters.The results show that,with proper parameters,CCC and CPC obtain similar stabilities; a PI controller delivers small current overshooting,fast responses and a good adjustability;and DC modulation increases system damping so as to raise power network stability.

     

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