Systems and methods of detecting ground faults in energy storage and/or generation systems that employ DC/AC power conversion systems
US9599651B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2015 |
| Grant date | Mar 21, 2017 |
| Priority date | — |
| Expiry date | Oct 22, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods of detecting ground faults in energy storage and/or generation systems that can detect ground faults on the DC and/or AC side of an energy storage/generation system, and generate warning signals and/or shutdown at least part of the system upon detection of such ground faults. The systems and methods can monitor levels of DC voltages and amplitudes of AC voltages occurring on the positive and negative side of a DC bus with respect to ground on the DC side of the energy storage and/or generation system, and process the monitored DC voltage levels and AC voltage amplitudes to detect a ground fault. Having detected such a ground fault, the systems and methods can generate a warning signal and/or shutdown at least part of the system, for example, by disconnecting a DC energy system from the DC bus, and/or by disabling a DC-to-AC bidirectional inverter included in the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.