Self-adaptive current limiter
By dynamically adjusting the current control band using an adaptive current limiter, the problem of instantaneous current exceeding or falling below the control band caused by highly variable di/dt fault current is solved, achieving stable current limiting and coordinated protection of fault current.
CN122092166APending Publication Date: 2026-05-26ABB (SCHWEIZ) AG
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ABB (SCHWEIZ) AG
- Filing Date
- 2025-11-25
- Publication Date
- 2026-05-26
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Figure CN122092166A_ABST
Abstract
The embodiment of the invention relates to an adaptive current limiter. In one embodiment, an adaptive current limiter includes at least one solid state switch, a voltage clamping circuit, a current sensing circuit, and a control circuit. The solid state switch is configured to selectively enable and disable a current path through the solid state switch. A voltage clamping circuit is connected in parallel with the solid-state switch. The current sensing circuit is configured to determine a magnitude of a fault current through the current path and a rate of change (di / dt) of the fault current. The control circuit is configured to: operate the solid state switch to selectively enable and disable the current path to maintain a magnitude of the fault current at Ipeak within an upper current band and a magnitude of the fault current at Ivalley within a lower current band; and modifying the upper current band and / or the lower current band based on the di / dt value of the fault current.
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