Detection and elimination of DC injection on the power grid system
US11271402B2 · kind B2 · utility
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14References
20Claims
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Key dates
| Filing date | Mar 10, 2020 |
| Grant date | Mar 8, 2022 |
| Priority date | — |
| Expiry date | Mar 17, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S40/121
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The presence of injected DC has harmful consequences for a power grid system. A piecewise sinusoidal ripple voltage wave at the line-frequency that rides on the main capacitor bank of the power converter is observed. This observation leads to a new DC detection elimination method. Three DC elimination methods for this ripple component are disclosed to allow dissipation of DC energy through heat and/or electromagnetic wave, or to allow transformation of this energy into usable power that is fed back into the power grid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.