The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 2022
Filed:
Mar. 10, 2020
Smart Wires Inc., Union City, CA (US);
Antonio Ginart, Santa Clarita, CA (US);
Shreesha Adiga Manoor, Milpitas, CA (US);
Mahsa Ghapandar Kashani, Millbrae, CA (US);
Hamed Khalilinia, Hayward, CA (US);
Haroon Inam, San Jose, CA (US);
Amrit Iyer, Oakland, CA (US);
Govind Chavan, Fremont, CA (US);
Niloofar Torabi, Menlo Park, CA (US);
Smart Wires Inc., Union City, CA (US);
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 detection method and mitigation method. A two-stage control circuit is added to the operation of a power converter that controls power line impedance in order to mitigate the injected DC and to block DC circulation. This control computes a correction angle to adjust the timing of generated pulsed square waves to counter-balance the ripple. A functional solution and the results of experiments are presented. Furthermore, an extraction method and three elimination methods for this ripple component are presented to allow dissipation of DC energy through heat and/or electronic magnetic wave, or to allow transformation of this energy into usable power that is fed back into the power grid.