ISSN 1000-1026
CN 32-1180/TP
  • ISSN 1000-1026
  • CN 32-1180/TP

Citation: gui lin.Analysis of Internal Fault Characteristics and Longitudinal Zero-sequence Overvoltage Protection Performance of Large-scale Condenser[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20181006001 copy

Analysis of Internal Fault Characteristics and Longitudinal Zero-sequence Overvoltage Protection Performance of Large-scale Condenser

  • Received Date: October 06, 2018
    Accepted Date: January 03, 2019
    Available Online: 2019-03-14

  • Abstract:

        Stator winding inter-turn short-circuit may exist in a large condenser (300Mvar), it is a serious hidden danger for the condenser to operate without perfect protection against inter-turn short-circuit. The Multi-Loop analysis method is used to simulate and analyze all possible internal faults of the large condenser of two different cooling modes. The results show that there is a large dead zone in the existing main protection configuration of the large condenser (complete longitudinal differential protection + longitudinal zero-sequence overvoltage protection), and the failure types of longitudinal zero-sequence overvoltage protection is further analyzed, which can provide reference for the performance improvement of the main protection configuration of later large condensers. This work is supported by the State Grid Corporation headquarter science and technology project (Research on fault characteristics, relay protection technology and operation control technology of synchronous condensers).


  • Keywords:

    large-scale condenser; inter-turn short-circuit; internal fault analysis; longitudinal zero-sequence overvoltage protection; split phase transversal differential protection


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