Matthew C Webster

US Patent:

20210328426, Oct 21, 2021

Filed:

Apr 16, 2020

Appl. No.:

16/850219

Inventors:

- Rosemead CA, US
Andrew Swisher - Riverside CA, US
Benjamin Garcia - La Palma CA, US
Matthew Webster - Phelan CA, US

International Classification:

H02H 9/08
H02H 3/16
H02H 7/045
G01R 31/62
G01R 31/52
G01R 31/08

Abstract:

Disclosed is a system that reduces fault currents in a power grid, thereby reducing the risk of unintentionally igniting a fire when an object comes in proximity to a high voltage power line. The circuit comprises an isolation transformer, a neutral connection, a current compensating device, and an automatic recloser or other circuit interrupting type protection system. The isolation transformer may comprise a delta-delta or delta-zigzag transformer with a one-to-one ratio between the input and output voltages and phase angle. The current compensating device is connected to the neutral and configured to redirect a substantial portion of a fault current to ground through the isolation transformer neutral instead of the fault itself. The current compensating device may comprise an arc suppression coil tuned to match the capacitance of the three phase outputs, or an inverter.