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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.:

US 10680550 B1

PDFFull Text
Date of Patent:
Jun. 09, 2020

Filed:

Mar. 30, 2017

Cascaded photovoltaic grid-connected inverter, control method and control device for the same

Applicant:

Sungrow Power Supply Co., Ltd., Hefei, Anhui, CN;

Inventors:

Jun Xu, Anhui, CN;

Tao Zhao, Anhui, CN;

Yilei Gu, Anhui, CN;

Assignee:

SUNGROW POWER SUPPLY CO., LTD., Hefei, Anhui, CN;

Attorney:

Cantor Colburn LLP

Primary Examiner:

Rexford N Barnie

Assistant Examiner:

Thai H Tran

Int. Cl.
CPC ...
H02S 40/32 (2014.01); H01L 31/05 (2014.01); H02J 3/16 (2006.01); H02J 3/38 (2006.01); H02S 40/36 (2014.01); H02M 7/49 (2007.01); H02M 1/42 (2007.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
H02S 40/32 (2014.12); H01L 31/0508 (2013.01); H02J 3/16 (2013.01); H02J 3/383 (2013.01); H02M 7/49 (2013.01); H02S 40/36 (2014.12); H02M 1/42 (2013.01); H02M 2001/0077 (2013.01); Y02B 70/12 (2013.01); Y02E 10/563 (2013.01);
Abstract

Provided are a cascaded photovoltaic grid-connected inverter, a control method and a control device for the same. The method includes: determining whether at least one of inverter units of the cascaded photovoltaic grid-connected inverter is over-modulated; injecting a reactive current to a power grid to make a grid-connected current effective value greater than or equal to √{square root over (2)}*i, in a case that at least one of the inverter units is over-modulated; determining a voltage Urequired for grid connection for the cascaded photovoltaic grid-connected inverter corresponding to a current grid-connected current effective value; and adjusting an output active voltage of each of the inverter units according to U=P/P*U, and adjusting an output reactive voltage of each of the inverter units in a case that none of the inverter units is over-modulated.

Find Patent Forward Citations

Xu, Jun. (2020). Cascaded photovoltaic grid-connected inverter, control method and control device for the same (U.S. Patent No. 10680550). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10680550

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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