Design of cross-coupling free current mode controller for UPFC series converter

The unified power flow controller (UPFC) is nowadays one of the most useful Flexible AC Transmission Systems (FACTS), allowing the simultaneous control of the bus voltage and line active and reactive power. This paper presents the model, cross-coupling free current mode control approach, simulations and experimental results in static and dynamic conditions of a current mode controller for the UPFC series converter. Simulations were carried in the Matlab/Simulink environment and experimental tests were performed using a lab prototype. The power flow control capability is demonstrated in steady state and in dynamic conditions.