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677 / 2022-03-31 09:22:21
Effects of Stray Current on Transferring Characteristics of Current Transformer
stray current; current transformer; DC bias; time-to-saturation
2. Transients and EMC: Lightning, Switching, Repetitive Transients
终稿
WU Guoxing / Shenzhen Power Supply Bureau Co., Ltd.
GONG Junqiang / Shenzhen Power Supply Bureau Co., Ltd.
WANG Qilin / Shenzhen Power Supply Bureau Co., Ltd.
ZHENG Runlan / Shenzhen Power Supply Bureau Co., Ltd.
ZHANG Guoxin / Shandong University
WANG Ganlin / Shandong University
DC bias may affect the transferring characteristics of the current transformer, threatening the operation of relay protection. Compared with the high voltage direct current (HVDC) transmission in the unipolar-earth loop operation mode and geomagnetically induced current (GIC), the amplitude of the stray current is smaller, and the randomness and fluctuation are larger and accompanied by sudden changes. The amplitude-frequency characteristics of stray currents are studied. According to the equivalent circuit of current transformer, the transmission characteristics and the saturation mechanism of current transformer due to stray current are discussed. Then simulation models are developed in PSCAD/EMTDC. Simulations are conducted to analyze current transformer transient saturation and partial transient saturation, the results of which demonstrate that the stray current is composed of a variety of low-amplitude low-frequency components, which amplitude, frequency and duration are the influencing factors that affect the CT transient transfer characteristics.
重要日期

  • 会议日期

    09月25日

    2022

    至

    09月29日

    2022

  • 08月15日 2022

    提前注册日期

  • 09月10日 2022

    报告提交截止日期

  • 11月10日 2022

    注册截止日期

  • 11月30日 2022

    初稿截稿日期

  • 11月30日 2022

    终稿截稿日期

主办单位
IEEE DEIS
承办单位
Chongqing University
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