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

Citation: NI Chuankun,于同伟,邓茂军,LI Baowei,HU Yebin,LI Xu.Transformer Longitudinal Differential Protection Based on GOOSE Network in Smart Substation[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20180528008 copy

Transformer Longitudinal Differential Protection Based on GOOSE Network in Smart Substation

  • Received Date: May 28, 2018
    Accepted Date: November 09, 2018
    Available Online: 2019-01-31

  • Abstract:

        For transformer longitudinal differential protection, the starting current should avoid the influence of unbalance current which is caused by the regulation of switch gear for on-load tap changer during normal operation. When adjusting the wide range of switch gear, the sensitivity of differential protection would be impacted by high setting of starting current. This paper proposes that the gear position information could be obtained through the GOOSE network for smart substation, and then adjust the balance coefficient of the differential protection automatically based on its actual gear position to eliminate the unbalanced current caused by gear position adjustment during normal operation. Meanwhile, the tuning method of differential protection based on GOOSE network is proposed, which reduces the starting current and ratio restraint coefficient, also improves the operating characteristics of differential protection. The simulation results show that the improved scheme enhances the sensitivity and quickness of transformer differential protection.

  • Keywords:

    smart substation; differential protection; GOOSE network; gear location information; balance coefficient; sensitivity

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