Journal of South China University of Technology(Natural Science Edition) ›› 2018, Vol. 46 ›› Issue (4): 85-90,97.doi: 10.3969/j.issn.1000-565X.2018.04.012

• Energy，Power & Electrical Engineering • Previous Articles     Next Articles

Risk Assessment Model of AC/DC Hybrid System Based on Random Fuzzy Theory
 

DONG Ping WU Huayi    

  1.   School of Electric Power，South China University of Technology，Guangzhou 510640，Guangdong，China
  • Received:2017-10-17 Revised:2017-12-13 Online:2018-04-25 Published:2018-03-01
  • Contact: 董萍( 1978-) ，女，博士，副教授，主要从事电力系统运行优化与控制研究 E-mail:epdping@scut.edu.cn
  • About author:董萍( 1978-) ，女，博士，副教授，主要从事电力系统运行优化与控制研究
  • Supported by:
     Supported by the National Program on Key Basic Ｒesearch Project of China( 973 Program) ( 2013CB228205) and the National Natural Science Foundation of China( 51107042) 

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Abstract:  In the operational risk assessment of AC/DC hybrid transmission system，the failure rate of transmission line is often characteristic of being random and fuzzy because of various uncertainties due to the lack of historical data and the influence of climate and other factors on the accuracy of data measurement． In this paper，the stochastic fuzzy uncertainty model of AC/DC transmission lines is put forward and the random fuzzy theory is applied in the operational risk assessment of AC/DC transmission system． Firstly，the model takes into account the random and fuzzy characteristics． Then the operational risk assessment index based on the definition of operational risk assessment is obtained． Finally，the expected value of the operational risk index is obtained by the use of the stochastic fuzzy simulation process combining the contingency set of AC/DC system． Take IEEE-30 AC/DC hybrid system for example and the results show that the model proposed in this paper is effective．

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