A hybrid high-voltage direct-current circuit breaker and control method
CN121923047BActive Publication Date: 2026-06-09WUHAN INSTITUTE OF MARINE ELECTRIC PROPULSION (THE 712TH RESEARCH INSTITUTE OF CHINA STATE SHIPBUILDING CORP LTD)
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WUHAN INSTITUTE OF MARINE ELECTRIC PROPULSION (THE 712TH RESEARCH INSTITUTE OF CHINA STATE SHIPBUILDING CORP LTD)
- Filing Date
- 2026-03-26
- Publication Date
- 2026-06-09
AI Technical Summary
Technical Problem
Existing hybrid high-voltage DC circuit breakers are complex and costly, mainly due to the need for three pulse discharge systems and two bridge circuits, resulting in large size and high cost.
Method used
A pulse discharge circuit is adopted, which realizes the fast mechanical switch opening function through the tripping commutation turn-off circuit, the current transfer branch realizes the transfer of fault current, and the voltage limiting and energy dissipation branch realizes the forced turn-off of thyristors, thus simplifying the circuit structure.
Benefits of technology
It reduces the circuit complexity and cost of circuit breakers while improving breaking reliability, making it suitable for fault protection in high-voltage DC power systems.
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Smart Images
Figure CN121923047B_ABST
Abstract
The application relates to a hybrid high-voltage direct-current circuit breaker and a control method, and belongs to the technical field of circuit breaker control, wherein the hybrid high-voltage direct-current circuit breaker comprises a main switch branch for through flow under normal conditions; a current transfer branch for fault current transfer and voltage conversion; a voltage limiting and energy consuming branch for overvoltage protection of the hybrid high-voltage direct-current circuit breaker; and a switching and commutation off circuit for controlling the off of the main switch branch, transferring the fault current from the main switch branch to the current transfer branch, and turning off the current transfer branch after the transfer is completed; and the main switch branch, the current transfer branch, the voltage limiting and energy consuming branch and the switching and commutation off circuit are connected in parallel. The application effectively reduces the circuit complexity and cost of the hybrid circuit breaker.
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