D-UPFC as a Voltage Regulator in the Distribution System

This paper proposes a voltage controller in order to control under-voltage and over-voltage condition in the distrubution system. The voltage controller, which are called distribution-unified power flow controller (D-UPFC), consists of ac-ac converter and the transformer. D-UPFC does not use any energy storage component or rectifier circuit, and it directly converts ac power to ac power. All pass filter and direct-quadrature (d-q) transformation functions are employed in the D-UPFC control. Also, D-UPFC is located in the pole transformer or any place in the distribution line. Simulation and experiment results show the possibility of controlling under-voltage and over-voltage conditions in the distribution system.

[1]  F. Pazos,et al.  DQ transformation development for single-phase systems to compensate harmonic distortion and reactive power , 2004, 9th IEEE International Power Electronics Congress, 2004. CIEP 2004.

[2]  S. Ben-Yaakov,et al.  A four quadrants HF AC chopper with no deadtime , 2006, Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06..

[3]  R. Alvarez,et al.  Compensation of voltage sags and swells using a single-phase AC-AC converter , 2004, 30th Annual Conference of IEEE Industrial Electronics Society, 2004. IECON 2004.

[4]  J.-H. Kim,et al.  Novel topologies of AC choppers , 1996 .