Y-capacitance fault current discharge compensation for HVDC...

Details Y-capacitance fault current discharge compensation for HVDC... Y-capacitance fault current discharge compensation for HVDC...

2008-04-08

2008-04-08

Sherry, Michael (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

Reexamination Certificate

active

07355831

ABSTRACT:
A fuel cell system or HVDC power source includes a fuel cell or DC power source having a high voltage direct current (HVDC) bus including y-capacitors, which connect the HVDC bus terminals to chassis or safety ground, and a fault current discharge compensation circuit interconnected with the HVDC bus. A monitoring circuit monitors a fault discharge current of the Y-cap circuit and generates a fault signal when the fault current occurs based on a rate of change of a voltage of the Y-cap circuit. A switching circuit redirects the majority of the fault discharge current.

REFERENCES:
patent: 6040561 (2000-03-01), Murty
patent: 2003/0155928 (2003-08-01), Roden et al.
patent: 2007/0116997 (2007-05-01), Raiser

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