Self-testing features of sensing and control electronics for a power grid protection system
USRE48775E1 · kind E1 · reissue
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2017 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Jul 7, 2037 |
Classification
- Technology area (CPC —)General
Abstract
Systems and method for detecting potentially harmful harmonic and direct current signals at a transformer are disclosed. One system includes a protection circuit electrically connected to a transformer neutral, the transformer electrically connected to a power grid, the protection circuit including a DC blocking component positioned between the transformer neutral and ground and one or more switches selectively actuated to form a path between the transformer neutral and ground in the event of unwanted DC current at the transformer neutral. The system also includes a control circuit electrically connected to the protection circuit and positioned to selectively actuate the switches based on observed conditions within the protection circuit. The system further includes a plurality of test connections disposed within the protection circuit and useable to test electrical properties of the protection circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.