一种开关器件的保护电路
By designing a protection circuit for switching devices, including a first-stage protection circuit and a buffer circuit, the problem of IGCT damage due to excessive voltage in the converter valve was solved, thus achieving protection for the IGCT and ensuring the safe operation of the DC power grid.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
- Filing Date
- 2021-06-29
- Publication Date
- 2026-07-17
AI Technical Summary
In the existing technology, the IGCT is easily damaged by excessive voltage in the passive buffer circuit capacitor during the normal operation of the converter valve, which affects the safe operation of the DC power grid.
A protection circuit for a switching device is designed, including a first-stage protection circuit and an optional buffer circuit. The circuit, composed of capacitors and diodes connected in parallel, conducts when the voltage across the switching device exceeds a preset threshold, suppressing voltage rise. The multi-stage protection circuit achieves dynamic and static voltage equalization and bypass current to protect the IGCT module.
It effectively suppresses the voltage rise across the switching devices, protects the IGCT from damage, ensures the safe operation of the DC power grid, and improves the safety and reliability of the IGCT module.
Smart Images
Figure CN115549453B_ABST