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Switched-capacitor high-speed emulator for real-time fault location in electrical power systems

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Abstract

This research presents a discrete-time transmission line model based on the propagation of travelling waves. In this approach, the transmission line is emulated by means of many interconnected unit delay cells implemented with switched-capacitor (SC) circuits. The accuracy and limitations of this method is compared to existing transconductance–capacitor solutions and is evaluated in the frame of a novel power network fault location method based on the electromagnetic time-reversal principle. The impact of the non-ideal effects associated to analog CMOS SC circuits, such as amplifier finite gain, offset and switch charge injection is evaluated in the same context. A possible application of the model for the simulation of interconnected or multi-conductor lines is also discussed. After an AMS 0.35 µm process implementation, it is shown that the present method allows a fault location within 1% resolution and is a hundred times faster than nowadays digital solutions. This speed improvement allows a fault location within 160 ms, making thus real-time applications realistic.

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Authors and Affiliations

  1. Electronics Laboratory, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

    François Gaugaz, François Krummenacher & Maher Kayal

Authors
  1. François Gaugaz
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  2. François Krummenacher
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  3. Maher Kayal
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Correspondence to François Gaugaz.

Additional information

This research has been Funded by the Swiss National Science Foundation (SNSF), within the Project N: 146414.

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Gaugaz, F., Krummenacher, F. & Kayal, M. Switched-capacitor high-speed emulator for real-time fault location in electrical power systems. Analog Integr Circ Sig Process 97, 449–456 (2018). https://doi.org/10.1007/s10470-018-1226-1

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  • DOI: https://doi.org/10.1007/s10470-018-1226-1

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