US 9,810,730 B2
System and method for electrical short detection
William James Premerlani, Scotia, NY (US); Karim Younsi, Niskayuna, NY (US); Bret Dwayne Worden, Erie, PA (US); John Krahn, Niskayuna, NY (US); Daniel Cullen, Erie, PA (US); and Ajith Kuttannair Kumar, Erie, PA (US)
Assigned to General Electric Company, Schenectady, NY (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on Sep. 17, 2015, as Appl. No. 14/856,945.
Claims priority of provisional application 62/067,086, filed on Oct. 22, 2014.
Prior Publication US 2016/0116519 A1, Apr. 28, 2016
Int. Cl. G01R 31/02 (2006.01); G01R 31/00 (2006.01); B60L 7/02 (2006.01)
CPC G01R 31/006 (2013.01) [G01R 31/008 (2013.01); G01R 31/025 (2013.01); B60L 7/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
measuring a characteristic of a current that is supplied to an electrical system from a power source as an applied voltage and that is conducted through one or more resistive elements of the electrical system;
determining a resistance change of the one or more resistive elements based at least in part on a difference between the characteristic of the current that is measured and a filtered value of one or more of the characteristic of the current that is measured or the applied voltage supplied by the power source; and
identifying a short circuit event based at least in part on the resistance change;
wherein the characteristic of the current that is measured is a voltage drop across at least one of the one or more resistive elements; and
wherein the resistance change represents a difference between a ratio of the voltage drop across the at least one of the one or more resistive elements to the applied voltage and a filtered value of the ratio of the voltage drop across the at least one of the one or more resistive elements to the applied voltage.