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A Simplified Equivalent Model of Central-North China Power Grid

(1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; 2. Midwest Independent Transmission System Operator Inc., Carmel 46032, USA)


In order to further study the operation mechanism of the Central-North China AC synchronous power grid, this paper simplified this power grid into a 7-machine 48-node equivalent system. The equivalent system well retains the power flow static characteristics, tie-line power dynamic characteristics, the impact of large disturbance characteristics and short-circuit current characteristics of the original power grid. By the simulation analysis of the equivalent system, this paper preliminarily proves that the system UHV AC line splitting resulting from the serious fault occurring in Sichuan power grid is an angle instability problem. Based on this, a practical measure is proposed to improve the system stability.



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[1]LIU Ju, SUN Haishun, LIU Ziquan, et al. A Simplified Equivalent Model of Central-North China Power Grid[J]. Automation of Electric Power Systems,2014,38(6):38-42. DOI:10.7500/AEPS20130712018
  • Received:July 12,2013
  • Revised:February 17,2014
  • Adopted:October 07,2013
  • Online: February 17,2014
  • Published: