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System to reduce start-up times in line-mounted fault detectors

  • US 10,459,025 B1
  • Filed: 04/04/2018
  • Issued: 10/29/2019
  • Est. Priority Date: 04/04/2018
  • Status: Active Grant
First Claim
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1. A line-mounted fault detector, comprising:

  • a power harvesting subsystem configured to harvest electrical energy from a conductor in an electric power system;

    a rectification subsystem configured to rectify electrical energy harvested by the power harvesting subsystem;

    an energy storage subsystem configured to store electrical energy rectified by the rectification subsystem;

    a fast-start power coupling subsystem;

    a first switch subsystem configured to selectively provide electrical energy to the fast-start power coupling subsystem;

    a fast-start subsystem configured to provide power to a subset of components in a startup state;

    a DC-DC converter subsystem in electrical communication with the energy storage subsystem and configured to start up after a voltage of the energy storage subsystem exceeds a first threshold, the DC-DC converter subsystem configured to generate a DC output from electrical energy received from the energy storage subsystem;

    a second switch subsystem configured to selectively provide electrical energy from the DC-DC converter to the fast-start subsystem;

    a control subsystem configured to transition the line-mounted fault detector to an operating state and to;

    actuate the first switch subsystem after an output of the DC-DC converter exceeds a second threshold, the first switch subsystem configured to de-energize the fast-start power coupling subsystem, andactuate the second switch subsystem after the output of the DC-DC converter exceeds the second threshold, the second switch subsystem configured to enable a flow of electrical energy from the DC-DC converter to the fast-start subsystem;

    a fault detection subsystem in electrical communication with the DC-DC converter subsystem and configured to detect a fault condition;

    an RF transmitter subsystem in electrical communication with the DC-DC converter subsystem and configured to transmit an indication of the fault condition.

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