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:
Sep. 16, 2025
Filed:
May. 03, 2024
Hitachi Energy Ltd, Zürich, CH;
Rasool Heydari, Västerås, SE;
Hongyang Zhang, Stockholm, SE;
Jean-Philippe Hasler, Västerås, SE;
Pinaki Mitra, Västerås, SE;
Hitachi Energy Ltd, Zurich, CH;
Abstract
The present disclosure provides a method and a control unit for controlling a power unit connected at a connection point to a power grid. The method comprises obtaining a power oscillation damping (POD) signal from a POD controller, based on a power oscillation in the power grid. A gain value may be determined based on a difference between a first voltage measurement at the connection point and a first voltage reference, or an estimated short circuit ratio of the power grid. The POD signal may be added to an input signal of a power unit regulator to obtain an intermediate reference signal. A combined reference signal may be determined based on adding the POD signal, multiplied by the gain value, to the intermediate reference signal. The power unit may be operated using the determined combined reference signal to damp the oscillation in the grid.