Vahid Bahrami Foroutan
Bu-Ali Sina University, Iran
Title: Stability and power quality improvement in micro-grids using Local control strategies
Biography
Biography: Vahid Bahrami Foroutan
Abstract
Using Micro-Grid (MG) concept to enhance penetration of Distributed Generation (DG) has raised some technical challenges including stability and power quality issues. Therefore, such issues has been researched and investigated by many experts in recent years.
Power quality considerations are the most challenging tasks in MGs so that designing control strategy without power quality considerations can lead to instability of MG. Thus, stability and power quality are two relevant issues regarding the selection of control strategy in an MG.
For this reason, this paper presents a review of control strategies and also investigates the effect of new approach on power quality and stability of MGs.
A new problem formulation is developed by employing a multi-objective function approach where the objectives include the fuel consumption cost, voltage stability index and the total voltage variation of MG. A hybrid optimization algorithm is proposed to solve the proposed problem by combing the HS and the GA. A new load flow formulation is derived to run the proposed optimization algorithm where the steady state frequency of system, reference frequency, reference voltage and droop coefficients of DGs, based on a droop controller, are considered as optimization variables. To find the best solution of non-dominated results, a fuzzy method is employed.