Open AccessDesign of Robust UPFC Controller Using H∞ Control Theory in Electric Power System
Author(s) -
Seyed Abbas Taher,
Shahabeddin Akbari,
Ali Abdolalipour,
Reza Hematti
Publication year - 2008
Publication title -
american journal of applied sciences
Language(s) - English
Resource type - Journals
eISSN - 1554-3641
pISSN - 1546-9239
DOI - 10.3844/ajassp.2008.980.989
Subject(s) - control theory (sociology) , unified power flow controller , electric power system , controller (irrigation) , control engineering , power (physics) , electric power , robust control , engineering , control system , computer science , control (management) , electrical engineering , physics , artificial intelligence , quantum mechanics , power flow , agronomy , biology
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