ON-LINE LOGIN AND LOGOUT CONTROL METHOD FOR CONVERTER OF PARALLEL HIGH-VOLTAGE DIRECT-CURRENT POWER TRANSMISSION SYSTEM

摘要

An on-line login and logout control method for a converter of a parallel high-voltage direct-current power transmission system. The method is based on the voltage and current operation control manners of the traditional parallel high-voltage direct-current power transmission, i.e. a rectifier station adopts constant current control, and an inverter station adopts constant voltage control. A current balance controller is particularly added to an inverter side, and operates in the case of unlocking two converters simultaneously for eliminating an unbalance phenomenon which is generated when the two converters conduct voltage control independently.