Abstract
The power flow controlled in the electric power network is one of the main factors that affected the modern power systems development. The unified power flow controller (UPFC) is a FACTS powerful device that can control both active and reactive power flow of parallel transmission lines branches. In this paper, modelling and simulation of active and reactive power flow control in parallel transmission lines using UPFC with adaptive neuro-fuzzy logic is proposed. The mathematical model of UPFC in power flow is also proposed. The results show the ability of UPFC to control the flow of powers components "active and reactive power" in the controlled line and thus the overall power regulated between lines.
Highlights
The unified power flow controller (UPFC) is a universal AC transmission controller having three main functions those are real and reactive power control, reactive power compensation and voltage regulation
“The series-connected voltage source” is modeled by an ideal series voltage Vs which is controllable in magnitude and phase
The UPFC is a member of the 2nd generation of FACTS which uses the concept of synchronous voltage source converter (VSC) for giving a uniquely comprehensive ability for transmission line control [1]
Summary
The unified power flow controller (UPFC) is a universal AC transmission controller having three main functions those are real and reactive power control, reactive power compensation and voltage regulation. There are several ways to introduce and explain the concept of UPFC These include mathematical approach, phasor diagrams, or various plots showing graphically relationships among the main transmission parameters, active and reactive power, voltage, line impedance, and transmission angle. The UPFC injection model is derived enabling three parameters to be simultaneously controlled They are namely the shunt reactive power, magnitude, and phase angle, of the injected series voltage Vs. The UPFC is a member of the 2nd generation of FACTS which uses the concept of synchronous voltage source converter (VSC) for giving a uniquely comprehensive ability for transmission line control [1]. The contribution of this study is to use a unified power flow controller for balancing active and reactive power flow in parallel transmission lines with adaptive neuro-fuzzy logic.
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