HIGH-VOLTAGE DIRECT-CURRENT POWER-TRANSMISSION SERIES VALVE GROUP CONTROL DEVICE

摘要

A high-voltage direct-current power-transmission series valve group control device (24), which is used for regulating a series circuit (10) composed of two or more valve groups (4) provided with controllable power semiconductors respectively. Each valve group is provided with a current regulation unit (17) and a voltage regulation unit (13). The current regulation unit controls a direct-current current flowing through a valve group corresponding thereto, and the voltage regulation unit controls a voltage across two ends of a valve group corresponding thereto. One valve group is selected from the series valve group as a master control valve group, while the others are taken as a slave control valve group. The master control valve group selects a trigger angle output by the current regulation unit to control same, and the slave control valve group selects a trigger angle obtained after the trigger angle transmitted from the master control valve group and an output value of the voltage regulation unit pass through a subtractor to control same.