18-10-2010, 12:53 PM
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Recent Power Electronics/FACTS Installations to Improve Power System Dynamic Performance
Introduction
Unified Power Flow Controller (UPFC) is used to control the power flow in the
transmission systems by controlling the impedance, voltage magnitude and phase angle.
This controller offers advantages in terms of static and dynamic operation of the power
system. It also brings in new challenges in power electronics and power system design. The
basic structure of the UPFC consists of two voltage source inverter (VSI); where one
converter is connected in parallel to the transmission line while the other is in series with
the transmission line.
