Open AccessInterior point‐based slack‐bus free‐power flow solution for balanced islanded microgrids
Author(s) -
Vural Ahmet Mete
Publication year - 2016
Publication title -
international transactions on electrical energy systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 42
ISSN - 2050-7038
DOI - 10.1002/etep.2117
Subject(s) - microgrid , interior point method , voltage droop , slack bus , control theory (sociology) , power (physics) , mathematical optimization , power flow , point (geometry) , distributed generation , computer science , flow (mathematics) , convergence (economics) , nonlinear system , operating point , power flow study , engineering , electric power system , ac power , voltage , mathematics , electronic engineering , voltage regulator , electrical engineering , artificial intelligence , economic growth , geometry , control (management) , quantum mechanics , physics , economics
Summary The power flow study is an exigency for planning, operation, and optimization of future smart microgrids. In this paper, an interior point‐based power flow solution for balanced microgrids operating in islanded mode is presented. In the proposed method, the power flow problem is set up as a constrained interior‐point optimization problem in which nonlinear power mismatch equations are iteratively solved without defining a slack bus. Unlike conventional power flow problems, the unknown frequency of the microgrid and droop equations for distributed generation units are also taken into account. Moreover, fixed, voltage‐dependent, and frequency‐dependent distributed loads are also considered. The computational efficiency of the proposed method is verified using two tools and tested with various case studies. The proposed method has a good convergence pattern and execution time for all types of distributed generation units and loads in islanded networks that are arbitrarily complex. Copyright © 2015 John Wiley & Sons, Ltd.