HVDC HVDC A CONTROL METHOD TO IMPROVE TRANSIENT PERFORMANCE OF HVDC SYSTEM AND AN INVERTER CONTROL APPARATUS OF HVDC SYSTEM

摘要

A control method for improving the transient performance of the HVDC system according to an embodiment of the present invention includes the steps of: (a) controlling a drive of an inverter of a high voltage direct current (HVDC) system, Determining whether a rectifier of the HVDC system is operating in a constant current control mode; (B) if the rectifier operates in the constant current control mode, determining in the control unit whether the inverter operates in a constant current control mode; And (c) when the rectifier and the inverter operate in the constant current control mode, increasing the SOHO angle command value applied to the subject flush angle controller in the inverter control apparatus by a predetermined SOHO correction value, HVDC system can reduce voltage fluctuation of inverter output and AC system relatively in the process of recovering after failure of AC system on rectifier side and can shorten transient time which is reaching steady state.;