公开(公告)号：US11996696B2

公开(公告)日：2024-05-28

申请号：US17908046

申请日：2020-04-02

Applicant: Hitachi Energy Ltd

Inventor： Lexuan Meng ,  Jean-Philippe Hasler ,  Gunnar Ingeström ,  Jan Kheir ,  Tong Wu ,  Theodore Soong

IPC: H02J3/40 ,  H02J3/18 ,  H02J3/30 ,  H02M5/458

CPC classification number: H02J3/40 ,  H02J3/18 ,  H02J3/30 ,  H02M5/4585

Abstract: A power supporting arrangement for a power grid includes a first and a second voltage source converter with an AC side and a DC side. A DC link interconnects the DC sides of the voltage source converters. A first switching arrangement includes a number of settable positions. The AC side of the second voltage source converter is connected to the power grid and the first switching arrangement is connected between a first synchronous machine. The AC side of the first voltage source converter and the power grid and operable to selectively connect the first synchronous machine to the power grid or to the AC side of the first voltage source converter.

公开(公告)号：US11996693B2

公开(公告)日：2024-05-28

申请号：US18555449

申请日：2021-04-14

Applicant: Hitachi Energy Ltd

Inventor： Per Karreby ,  Daniel Hallmans ,  Lexuan Meng ,  Maria Werlefors

IPC: H02J3/32 ,  H02J3/46 ,  H02J13/00

CPC classification number: H02J3/32 ,  H02J3/46 ,  H02J13/00019

Abstract: A support system for an AC power transmission system, comprising an energy storage arrangement comprising a plurality of storage units and a main controller configured to control the operation of the energy storage arrangement. Each storage unit comprises at least three control signal connections and is configured to receive a control signal from at least three storage entities via said control signal connections, wherein each of the storage entities is either the main controller or a storage unit controller of an adjacent storage unit. The storage units are arranged to forward a control signal received via a first one of said control signal connections to all adjacent storage units that are connected via the remaining ones of said control signal connections.

公开(公告)号：US12212165B2

公开(公告)日：2025-01-28

申请号：US18700636

申请日：2021-10-13

Applicant: Hitachi Energy Ltd

Inventor： Per Karreby ,  Jean-Philippe Hasler ,  Mikael Tenerz ,  Mohsen Asoodar ,  Lexuan Meng

IPC: H02J7/00

Abstract: An arrangement is disclosed, comprising a series connection of a plurality of energy storage units, a plurality of bypass circuits, each bypass circuit being configured to bypass a respective one of the energy storage units in the series connection, and a plurality of control modules, wherein each control module corresponds to a respective one of the bypass circuits. Each control module is configured to control operation of the corresponding bypass circuit and at least one other bypass circuit of the plurality of bypass circuits to selectively bypass the corresponding energy storage units in the series connection in such a way that operation of each bypass circuit of the plurality of bypass circuits to selectively bypass the corresponding energy storage unit in the series connection is controllable by means of at least two of the control modules. A related method is also disclosed.