A Novel Power-frequency Variation Protection Strategy Based on System Setting Impedance

NENG JIN, JIAWEI XING, YINGFA HE, XIANGNING LIN, LE CHEN, SHIMING LIU

Abstract


By analyzing the protection principle of power-frequency variation and the influence of the current transformer saturation, this paper proposes a novel protection strategy based on power-frequency variation of the maximum and minimum setting impedance of the system to cope with the transformer saturation. Typical saturation cases of transmission line are analyzed and the simulation results based on PSCAD indicate that the proposed strategy could guarantee the correct operation of protection, which maintains the original operation characteristics of power-frequency variation protection.

Keywords


System impedance, power-frequency variation, current transformer, saturation


DOI
10.12783/dtcse/aiea2017/14962

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