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Abstract
Distributed generation (DG) is a new approach for solving some problems of older power networks. Due to the increasing power demand in recent power systems, the importance of power loss reduction and maintaining system voltages within an acceptable range has given rise to the wide use of DG units in power systems. On the other hand, unplanned and non-optimal application such as installation and operation of DG units might cause other technical problems. In addition, it is important to consider the load pattern in the network, and the best decision for DG unit's operation must be chosen accordingly. In this paper, a method is introduced in order to make the optimal placement and find an optimal operating point for the DG units, which means the power output of DG units, considering the load pattern of the network. This load pattern has an average load of 24 hr a day, four seasons a year. In the proposed method, optimization has two goals: first, is optimizing the DG unit's placement based on improvement of the voltage profile, and the second is operating DG units with optimum power factor, minimizing power loss, and improving voltage profile, with regard to the load pattern. In order to solve this problem, the gravitational search algorithm and genetic algorithm are used. The proposed method is applied on the IEEE 33-bus test system, and the result shows the effectiveness of the proposed method. In order to solve the optimization problem, MATLAB software is used.
Additional information
Notes on contributors
Sajjad Hadavi
Sajjad Hadavi was born in Kashmar, Iran in 1991. He received the B.S and M.S. degrees in electrical engineering from Amirkabir University of technology, Tehran, Iran in 2013 and 2015, respectively. He is also member of FACTS lab in Amirkabir University of technology. His main fields of interests are Smart grids, Microgrids, FACTS devices, Power system component modeling and simulation.
Ali Zoghi
Ali Zoghi was born in 1991 in Ahwaz, Iran. He received the B.S. and M.S. degrees in electrical engineering from the Amirkabir University of Technology, Iran. His research interests include electrical and energy systems engineering, renewable energy systems, integration of renewable resources in power system, power system economics and optimization, and smart grids.
Behrooz Vahidi
Behrooz Vahidi received the B.S. degree in electrical engineering from Sharif University of Technology, Tehran, Iran, in 1980, the M.S. degree in electrical engineering from Amirkabir University of Technology, Tehran, in 1989, and the Ph.D. degree in electrical engineering from the University of Manchester Institute of Science and Technology, Manchester, U.K., in 1997. From 1989 to the present, he has been with the Department of Electrical Engineering of Amirkabir University of Technology, where he is now a Professor. He has authored and coauthored more than 400 papers and six books on high-voltage engineering and power system. Prof. Vahidi is IEEE senior member and he is selected by the ministry of higher education of Iran and by IAEEE (Iranian Association of Electrical and Electronics Engineers) as the distinguished researcher of Iran. His main fields of research are high voltage, electrical insulation, power system transient, lightning protection, and pulse power technology.
Gevork B. Gharehpetian
Gevork B. Gharehpetian received his BS, MS and Ph.D. degrees in electrical engineering in 1987, 1989 and 1996 from Tabriz University, Tabriz, Iran and Amirkabir University of Technology (AUT), Tehran, Iran and Tehran University, Tehran, Iran, respectively, graduating all with First Class Honors. As a Ph.D. student, he has received scholarship from DAAD (German Academic Exchange Service) from 1993 to 1996 and he was with High Voltage Institute of RWTH Aachen, Aachen, Germany. He has been holding the Assistant Professor position at AUT from 1997 to 2003, the position of Associate Professor from 2004 to 2007 and has been Professor since 2007. The power engineering group of AUT has been selected as a Center of Excellence on Power Systems in Iran since 2001. He is a member of this center. He was selected by the ministry of higher education as the distinguished professor of Iran and by IAEEE (Iranian Association of Electrical and Electronics Engineers) as the distinguished researcher of Iran and was awarded the National Prize in 2008 and 2010, respectively. Prof. Gharehpetian is a senior and distinguished member of IEEE and IAEEE, respectively, and a member of the central board of IAEEE since 2004. His main field of research is electric power engineering.
Seyed Hossein Hosseinian
Seyed Hossein Hosseinian was born in Iran. He received the Ph.D. degree from the Electrical Engineering Department, University of Newcastle, Newcastle upon Tyne, U.K., in 1995. He is currently a Professor in the Electrical Engineering Department, Amirkabir University of Technology (AUT), Tehran, Iran. He is the author of four books in the field of power systems. He is also the author and the coauthor of more than 100 technical papers. His research interests include transient in power systems, power quality, restructuring, and deregulation in power systems.
