Abstract
The present invention relates to a control method for enhancing a dynamic model of power flow. A serial converter, a shunt converter and a direct current coupling capacitor are respectively set up between the two buses in a power transmission system. By using the serial converter, a d-axis current is used to regulate the real power in a transmission line; a q-axis current is used to regulate the reactive power in a transmission line. By using the shunt converter, a d-axis current is used to regulate an UPFC direct current coupling capacitor voltage, a q-axis current is used to regulate the s sending-end bus current. By using an UPFC direct current coupling capacitor, a regular voltage of a transmitting current can be maintained. Finally, the regulated current is transmitted to the power system.