High voltage direct current transmission system and control method thereof

摘要

A high voltage direct current (HVDC) transmission system is provided. The high voltage direct current (HVDC) transmission system includes: a rectifier converting alternating current (AC) power into DC power; an inverter converting the DC power into the AC power; a DC transmission line transmitting, to the inverter, the DC power obtained through conversion by the rectifier; a first active power measurement unit measuring first active power input to the rectifier; a second active power measurement unit measuring second active power output from the inverter; and a first control unit detecting an abnormal voltage state on the DC transmission line based on the first and second active power measured.

主权项

1. A high voltage direct current (HVDC) transmission system comprising:
a rectifier configured to convert alternating current (AC) power into direct current (DC) power; an inverter configured to convert the DC power into the AC power; a DC transmission line configured to transmit, to the inverter, the DC power obtained through conversion by the rectifier; a first active power measurement unit configured to measure first active power input to the rectifier; a second active power measurement unit configured to measure second active power output from the inverter; and a first control unit configured to: determine a ratio of the second active power to the first active power; and detect an abnormal voltage state on the DC transmission line when the determined ratio is out of a threshold ratio range.