Control and analysis of a unified power flow controller

Design, Analysis, Fabrication, and Testing of Laboratory Model of Transmission Line

“…In the frequency range higher that 50 Hz, G 1 (s) shows a high gain and less phase delay as compared with G 2 (s). Fujita et al [20] described the cross-coupling control and advance control scheme for the UPFC embedded TL using dq0 variables. It has been shown that G 2 (s) causes cross-coupling of V cd (direct axis injecting voltage) with quadrature axis current I q and V cq (quadrature axis injecting voltage) with direct axis current I d .…”

“…A close study of [18][19][20][21][22][23][24] reveals that modeling and parameter selection of TLs needs to be elaborated in detail. The current carrying capacities of some of the TL models were quite low.…”

“…Many researchers have developed the schematic and basic control models of reconfigurable FACTS systems in power engineering laboratories, making use of inductors and resistors as TL models [18][19][20][21][22].…”

Design of controller for Unified Power Flow Controller (UPFC) using Sliding Mode Control (SMC) strategies

“…Real and Reactive power flow of transmission lines can be controlled independently. UPFC can also be used to improve transient stability [4], steady-state stability [5] and also to limit fault currents [4] [6]. Different controllers have been proposed for UPFC.…”

A Mixed LQRI / PI based Control for Three-Phase UPQCs

“…At the same time, new electronics applications that are critical to the production processes in different fields require mostly near sinusoidal voltages to ensure their correct operation. Then, it is necessary to include some compensation level to assure Power Quality in the electrical system [1] [2] [3].…”