Patent ID: 11909303
Assignee: HYOSUNG HEAVY INDUSTRIES CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A device for bypassing a sub-module in a high voltage direct current (HVDC) system, the device comprising:
the sub-module configured to generate a voltage in the HVDC system;
a bypass switch driving unit configured to drive a bypass switch positioned at an input of the sub-module;
a sub-module controller configured to monitor a voltage of a capacitor positioned in the sub-module to transmit the monitored voltage to a system controller and control the sub-module and the bypass switch driving unit according to a command of the system controller; and
a voltage monitoring unit configured to monitor the voltage of the capacitor positioned in the sub-module and control the bypass switch driving unit,
wherein, when the voltage of the capacitor exceeds a bypass switch-on voltage by the sub-module controller positioned between an operating voltage and a capacitor limit voltage, the sub-module controller controls the bypass switch driving unit to perform bypass at the input of the sub-module, and
wherein, when the voltage of the capacitor exceeds a bypass switch-on voltage by the voltage monitoring unit positioned between the bypass switch-on voltage by the sub-module controller and the capacitor limit voltage, the voltage monitoring unit controls the bypass switch driving unit to perform bypass at the input of the sub-module.