The unified power flow controller (UPFC) is the most versatile among a variety of flexible AC transmission system (FACTS) devices, which can be used for power flow control, enhancement of transient stability, damping system oscillations and voltage regulation. In this paper, we propose a new PI based approach for the dynamic control of UPFC. With the new control strategy, not only the active and reactive power flow control but also the system oscillations damping can be achieved. The digital simulation results developed in MATLAB and PSCAD/EMTDC environments are presented to verify the efficiency of the proposed control algorithm.

Meeting Name

2002 IEEE Power Engineering Society Winter Meeting (2002: Jan. 27-31, New York, NY)


Electrical and Computer Engineering

Keywords and Phrases

EMTP; MATLAB; PI Based Approach; PSCAD/EMTDC; UPFC; Active Power Flow Control; Damping; Damping System Oscillations; Digital Simulation; Flexible AC Transmission System Devices; Flexible AC Transmission Systems; Load Flow Control; Oscillations; Power Flow Control; Power System Control; Power System Transient Stability; Reactive Power Control; Reactive Power Flow Control; System Oscillations Damping; Transient Stability Enhancement; Two-Term Control; Unified Power Flow Controller; Voltage Control; Voltage Regulation

International Standard Book Number (ISBN)


Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 2002 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jan 2002