METHOD, APPARATUS, AND SYSTEM FOR CONTROLLING STRING INVERTER, AND STORAGE MEDIUM

Title:

METHOD, APPARATUS, AND SYSTEM FOR CONTROLLING STRING INVERTER, AND STORAGE MEDIUM

Document Type and Number:

WIPO Patent Application WO/2021/047389

Kind Code:

A1

Abstract:

The present application relates to the technical field of photovoltaics, and disclosed are a method, apparatus and system for controlling a string inverter and a storage medium. The method comprises: during the process of performing IV curve scanning for one or more first DC/DC boost circuits, controlling the change in the output voltage of one or more second DC/DC boost circuits that do not need to perform IV curve scanning, wherein the change trend appears to have a non-strictly monotonic increasing relationship with the change trend of the input voltage of the one or more first DC/DC boost circuits that perform IV curve scanning. In the foregoing manner, for DC/DC boost circuits that perform IV curve scanning, the voltage difference across two ends of the DC/DC boost circuits will not always be in a relatively high state, so that the ripple current on an input inductor in the DC/DC boost circuits may be reduced, that is too say, the DC/DC boost circuits may be prevented from triggering overcurrent protection due to excessive ripple current on the input inductor.

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Inventors:

YU XINYU (CN)
XIN KAI (CN)

Application Number:

PCT/CN2020/111435

Publication Date:

March 18, 2021

Filing Date:

August 26, 2020

Export Citation:

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Assignee:

HUAWEI TECH CO LTD (CN)

International Classes:

H02M7/12; H02J3/38; H02M1/14

Foreign References:

CN110719038A	2020-01-21
CN108879756A	2018-11-23
CN107017836A	2017-08-04
CN107508551A	2017-12-22
US20100020576A1	2010-01-28
CN201910848724A	2019-09-09

Other References: