Design of Robust UPFC Controller Using H∞ Control Theory in Electric Power System
Seyed Abbas Taher, Shahabeddin Akbari, Ali Abdolalipour and Reza Hematti
DOI : 10.3844/ajassp.2008.980.989
American Journal of Applied Sciences
Volume 5, Issue 8
An industrial plant, such a power system, always contains parametric uncertainties. In the design of a controller the uncertainties have to be considered. Otherwise, if the real plant differs from the assumed plant model, a controller, designed based on classical controller design approaches, may not ensure the stability of the overall system. In this paper design of robust control for the UPFC controllers including power - flow and DC voltage regulator, using a H∞ loop-shaping design via a normalized coprime factorization approach, where loop-shape refers to magnitude of the loop transfer function L = GK as function of frequency is presented. As an example, we have designed a case for the system to compare the proposed method with a conventional method (classical P-I controller). AS the results of the linear and nonlinear simulations, the validity of the proposed method has been confirmed.
© 2008 Seyed Abbas Taher, Shahabeddin Akbari, Ali Abdolalipour and Reza Hematti. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.