Patent ID: 11885844
Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 6:
7. A device for detecting insulation state in a conversion system, wherein the conversion system includes an excitation source, a converter having an input end coupled to the excitation source, a connection element coupled between an output end of the converter and a reference point, and a coupling impedance having a first end coupled to the excitation source and a second end coupled to the reference point,
the device for detecting insulation state including:
a pulse current sensor sleeved on the connection element for detecting a pulse current signal of the connection element when at least one main power switch of the converter does not switch; and
a partial discharge signal processing unit connected to the pulse current sensor for receiving the pulse current signal, processing the pulse current signal, and outputting a partial discharge information, wherein the partial discharge information indicates an insulation state of an isolating transformer in the converter.