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(11)

EP 4 681 319 A1

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(43) Date of publication: 21.01.2026 Bulletin 2026/04 (21) Application number: 23712823.6 (22) Date of filing: 15.03.2023

(51) International Patent Classification (IPC):  H02P 1/26(2006.01) H02P 21/22(2016.01) H02P 21/12(2016.01) (52) Cooperative Patent Classification (CPC): H02P 1/26; H02P 21/22; H02P 21/06 (86) International application number: PCT/EP2023/056609 (87) International publication number: WO 2024/188461 (19.09.2024 Gazette 2024/38)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (71) Applicant: Hitachi Energy Ltd 8050 Zürich (CH)	(72) Inventors: YANG, XiaoBo 100015 Beijing (CN) HUANG, Xing 100024 Beijing (CN) YANG, MinZhong 100192 Beijing (CN) (74) Representative: Michalski Hüttermann & Partner Patentanwälte mbB  Kaistraße 16A 40221 Düsseldorf 40221 Düsseldorf (DE)