US 11,862,963 B2
Electrical system redundant overvoltage protection
Lev Sorkin, Cranford, NJ (US); and Priyanka D. Shivthare, Ocean, NJ (US)
Assigned to Safran Power USA, LLC, Twinsburg, OH (US)
Appl. No. 17/297,559
Filed by Safran Power USA, LLC, Twinsburg, OH (US)
PCT Filed Nov. 30, 2018, PCT No. PCT/US2018/063339
§ 371(c)(1), (2) Date May 27, 2021,
PCT Pub. No. WO2020/112139, PCT Pub. Date Jun. 4, 2020.
Prior Publication US 2021/0399542 A1, Dec. 23, 2021
Int. Cl. H02H 7/06 (2006.01); H02P 29/024 (2016.01); H02P 9/10 (2006.01)
CPC H02H 7/065 (2013.01) [H02P 9/10 (2013.01); H02P 29/0241 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
monitoring a point of regulation voltage input to a generator control unit;
monitoring a generator output voltage as a backup point of regulation voltage input;
detecting an overvoltage fault at the point of regulation voltage input, the backup point of regulation voltage input, or both;
opening a first solid-state switch in response to detecting the overvoltage fault to prevent provision of an input signal to a generator excitation field;
opening a generator excitation field relay in response to detecting the overvoltage fault to prevent provision of the input signal to the generator excitation field; and
opening a second solid-state switch at a blocking circuit in response to detecting that an input signal to the generator excitation field is above a voltage threshold that induces the generator output voltage to an overvoltage fault value.