Power arrangement and method for operating a power arrangement

The power arrangement with a control circuit that manages fault signals and converter modes addresses the issue of unnecessary shutdowns in microgrids, enhancing stability and preventing blackouts by supporting the DC link during faults.

WO2025061503A1 Publication Date: 2025-03-27EATON INTELLIGENT POWER LTD
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Patent Information

Application Number
PCT/EP2024/075108
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-22
Filing Date
2024-09-09
Publication Date
2025-03-27

AI Technical Summary

Technical Problem

Existing power arrangements in microgrids are prone to complete shutdown due to faults, such as short-circuits, which can cause overcurrents in other circuit breakers, leading to unnecessary tripping and potential blackouts.

Method used

A power arrangement with a control circuit that receives information from circuit breakers and converters, allowing it to manage fault signals and change converter modes from normal to fault mode, thereby supporting the DC link during faults and preventing unnecessary shutdowns.

Benefits of technology

The proposed solution enhances the stability of power arrangements by preventing unnecessary shutdowns during faults, allowing most parts of the microgrid to continue operating while supporting the DC link, thus increasing grid inertia against short circuits.

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Abstract

A power arrangement (10) comprises a first number N of power circuits (11 to 15), a DC link line (16), and a control circuit (17). Each power circuit of the first number N of power circuits (11 to 15) comprises a circuit breaker (21 to 25) and a converter (31 to 35) which is coupled via the circuit breaker to the DC link line (16). Each circuit breaker (21 to 25) of the first number N of power circuits (11 to 15) and each converter (31 to 35) of the first number N of power circuits (11 to 15) are coupled to the control circuit (17). Moreover, a method for operating a power arrangement (10) is provided.
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