Line power control method and system for unified power flow controller

摘要

A line power control method and system for a unified power flow controller includes outer loop line power control, inner loop valve side current control, and converter valve control. Series-side converter valve side current reference values I_sedref and I_seqref are calculated by means of the outer loop line power control according to line power instructions P_ref and Q_ref that are input, a measured line power U_L, and measured line power P_line and Q_line; a converter output voltage reference value U_cref is calculated by means of the inner valve side current control according to the valve side current reference values that are output by means of the outer loop power control, a measured valve side current, and a measured valve side voltage; and finally, a converter outputs, according to the voltage reference value, a corresponding voltage to control line power to achieve a reference value.