HALF BRIDGES MULTI-MODULE CONVERTER USING SERIES COMPENSATION

摘要

PURPOSE: A series compensation half bridge multi-module converter is provided to prevent short-circuit current in accidents by controlling current flowing in a smoothing series inductor through a secondary side circuit. CONSTITUTION: A half bridge multi-module converter (100) includes a series compensation inductor (110) with a transformer structure, a multi-module converter (MMC) (130), and a grid related compensation system (120). The MMC includes multiple half bridge type conversion modules. The series compensation inductor has a first inductor and a second inductor connected in series between the half bridge type conversion modules connected to a positive terminal and a negative terminal of an output side of the MMC in series. A system AC input is received through a contact point of a primary side coil of the first inductor and a primary side coil of the second inductor. The grid related compensation system is connected between secondary side coils of the first inductor and the second inductor and a terminal of the system AC input. [Reference numerals] (AA) Load