Two Separate Continually Online Trained Neurocontrollers for a Unified Power Flow Controller


The crucial factor affecting the modern power systems today is load flow control. The Unified Power Flow Controller (UPFC) provides an effective means for controlling the power flow and improving the transient stability in a power network. The UPFC has fast complex dynamics and its conventional control is based on a linearized model of the power system. This paper presents the design of neurocontrollers that control the power flow and regulates voltage along a transmission line. Two separate neurocontrollers are used for controlling the UPFC, one neurocontroller for the shunt inverter and the other for the series inverter. Simulation studies carried out in the PSCAD/EMTDC environment is described and results show the successful control of the UPFC and the power system with the two neurocontrollers. Performances of the neurocontrollers are compared with the conventional PI controllers for system oscillation damping.

Meeting Name

38th IAS Annual Meeting of the Industry Applications Conference, 2003


Electrical and Computer Engineering

Keywords and Phrases

EMTP; PSCAD/EMTDC Environment; Unified Power Flow Controller; Adaptive Control; Complex Dynamics; Continually Online Trained Neurocontrollers; Control System Synthesis; Load Flow Control; Neurocontrollers; Power System Control; Power System Transient Stability; Power Transmission Control; Power Transmission Lines; Series Inverter; Shunt Inverter; System Oscillation Damping; Transient Stability Improvement; Transmission Line; Unified Power Flow Controller; Voltage Control; Voltage Regulation

Document Type

Article - Conference proceedings

Document Version


File Type





© 2003 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jan 2003