US 11,996,693 B2
Control platform architecture for grid integration of large-scale grid energy storage system
Per Karreby, Västerås (SE); Daniel Hallmans, Ludvika (SE); Lexuan Meng, Västerås (SE); and Maria Werlefors, Västerås (SE)
Assigned to HITACHI ENERGY LTD, Zürich (CH)
Appl. No. 18/555,449
Filed by Hitachi Energy Ltd, Zürich (CH)
PCT Filed Apr. 14, 2021, PCT No. PCT/EP2021/059602
§ 371(c)(1), (2) Date Oct. 13, 2023,
PCT Pub. No. WO2022/218514, PCT Pub. Date Oct. 20, 2022.
Prior Publication US 2024/0088662 A1, Mar. 14, 2024
Int. Cl. H02J 3/32 (2006.01); H02J 3/46 (2006.01); H02J 13/00 (2006.01)
CPC H02J 3/32 (2013.01) [H02J 3/46 (2013.01); H02J 13/00019 (2020.01)] 14 Claims
OG exemplary drawing
 
1. A support system for an alternating current, AC, power transmission system, comprising:
an energy storage arrangement comprising a plurality of interconnected storage units (112), wherein the energy storage arrangement is configured to output power to the AC power transmission system and to charge the storage units with power from the AC power transmission system; and
a main controller configured to control the operation of the energy storage arrangement;
wherein each storage unit of the plurality of storage units comprises at least three control signal connections and a storage unit controller configured to control the operation of the storage unit, wherein the at least three control signal connections are connected to the storage unit controller;
wherein each of the storage units is configured to receive a control signal from at least three storage entities via said control signal connections;
wherein each of said storage entities is either the main controller or a storage unit controller of an adjacent storage unit; and
wherein each of the storage units is 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;
wherein the support system further comprises:
a converter arrangement comprising a plurality of interconnected converter units configured to be functionally arranged between the energy storage arrangement and the AC power transmission system to act as static synchronous compensator, STATCOM; and
a converter arrangement controller configured to control the operation of the converter arrangement;
wherein each converter unit comprises at least three control signal connections and a converter unit controller configured to control the operation of the converter unit;
wherein each converter unit is configured to receive a control signal from at least three converter entities via said control signal connections;
wherein each of said converter entities is either the converter arrangement controller or a converter unit controller of an adjacent converter unit; and
wherein each converter unit is arranged to forward a control signal received via a first one of said control signal connections to all adjacent converter units connected via the remaining ones of said control signal connections.