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Effective Demand Side Scheme for PHEVs Operation Considering Voltage Stability of Power Distribution Systems

  • Mamdouh Abdel-Akher was born in Egypt on October 9, 1974. He received the B.Sc. with a first-class honors and M. Sc. degrees from Assiut University, Egypt, in 1997 and 2002 respectively and the Ph. D in 2006 from University of Malaya, Kuala Lumpur, Malaysia. Since 1999, he has been associated with the Department of Electrical Engineering, Aswan University, Egypt as a research engineer, and since 2002, as an Assistant Lecturer, and currently as an associate professor. His current research interest is in power system analysis and simulation.

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    Ahmad Eid (S’06-M’10) was born in Egypt. He received the B.Sc. and M.Sc. degrees in electrical engineering from Assiut University, Egypt, in 1997 and 2002, respectively. He received Ph.D. degree in electrical engineering from South Valley University, Egypt in 2010 from a joint research with the University of Texas at Tyler, TX, USA. Dr. Eid was a research engineer in Malaya University, Kuala Lumpur, Malaysia, 2003-2005 and in Kyungnam University in Masan, South Korea, 2006. Currently, he is an Associate Professor in electrical engineering department, faculty of engineering Aswan University, Aswan, Egypt. Major of interests include Power system control, Power quality, Aircraft power systems, Distribution generation, Power electronics and Renewable energy systems.

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    Abdel-Fatah Ali received the B.Sc. and M.Sc. degrees in electrical engineering from Aswan University, Aswan, Egypt, in 2009 and 2013, respectively. Since 2010, he has been an Assistant Lecturer with the Faculty of Engineering, South Valley University, Qena, Egypt. He is currently working toward the Ph.D. degree at the Doctoral School of Electrical Engineering, Faculty of Electrical Engineering and informatics, Budapest University of Technology and Economics, Budapest, Hungary. His research interests include modeling, analysis, control, and optimization of distribution systems with distributed generation and plug-in hybrid electric vehicles.

Published/Copyright: March 10, 2017

Abstract

This paper presents a new technique for a controlled charging/discharging of the PHEV’s battery considering the network status on a real-time basis. A control strategy is developed to secure the operation of power system irrespective of the number of vehicles and their connection place. The proposed control strategy utilizes an improved normalized steady-state voltage stability index that is easy to compute in the distribution management systems. A fuzzy logic controller (FLC) is used for evaluating the battery level of charging/discharging of individual PHEV connected to the distribution network. The controller is a part of the smart charger which uses the battery state of charge and the stability index as input variables. Based on the FLC output, the interface converter of a PHEV decides the desired charging/discharging levels of the battery. The developed controller ensures the secure operation of the distribution system during charging since only empty batteries will have a high priority to charge. A time domain, as well as 24-hour time-series simulations, are used to test the proposed control method. The results show that the developed control method guarantees secure operation, whatever the number and location of PHEVs connected to the studied system.

Funding statement: Science and Technology Development Fund (Grant /Award Number: ‘839ʹ)

About the authors

Mamdouh Abdel-Akher

Mamdouh Abdel-Akher was born in Egypt on October 9, 1974. He received the B.Sc. with a first-class honors and M. Sc. degrees from Assiut University, Egypt, in 1997 and 2002 respectively and the Ph. D in 2006 from University of Malaya, Kuala Lumpur, Malaysia. Since 1999, he has been associated with the Department of Electrical Engineering, Aswan University, Egypt as a research engineer, and since 2002, as an Assistant Lecturer, and currently as an associate professor. His current research interest is in power system analysis and simulation.

Ahmad Eid

Ahmad Eid (S’06-M’10) was born in Egypt. He received the B.Sc. and M.Sc. degrees in electrical engineering from Assiut University, Egypt, in 1997 and 2002, respectively. He received Ph.D. degree in electrical engineering from South Valley University, Egypt in 2010 from a joint research with the University of Texas at Tyler, TX, USA. Dr. Eid was a research engineer in Malaya University, Kuala Lumpur, Malaysia, 2003-2005 and in Kyungnam University in Masan, South Korea, 2006. Currently, he is an Associate Professor in electrical engineering department, faculty of engineering Aswan University, Aswan, Egypt. Major of interests include Power system control, Power quality, Aircraft power systems, Distribution generation, Power electronics and Renewable energy systems.

Abdelfatah Ali

Abdel-Fatah Ali received the B.Sc. and M.Sc. degrees in electrical engineering from Aswan University, Aswan, Egypt, in 2009 and 2013, respectively. Since 2010, he has been an Assistant Lecturer with the Faculty of Engineering, South Valley University, Qena, Egypt. He is currently working toward the Ph.D. degree at the Doctoral School of Electrical Engineering, Faculty of Electrical Engineering and informatics, Budapest University of Technology and Economics, Budapest, Hungary. His research interests include modeling, analysis, control, and optimization of distribution systems with distributed generation and plug-in hybrid electric vehicles.

Nomenclature

a,b,c

constants of a second order equation

AC

alternating current

CO_2

Carbon dioxide

DC

direct current

DMS

distribution management system

EV

electric vehicle

FLC

fuzzy logic controller

G2V

grid to vehicle

HEV

hybrid electric vehicle

i,j

refer to buses

id

direct current component

iq

quadrature current component

ib

battery charging current

IDLE

idle operation mode

LC

second-order passive filter

NR

Newton-Raphson method

NSI

maximum stability index or network stability index

P,Q

active and reactive powers

Pb

battery power

PL

load power

Pu

utility power

PHEV

plugin hybrid electric vehicle

PI

proportional-integral control

PLC

power-line communication

Qn

nominal charge

R,X

line resistance and reactance

S

switch

SI

stability index

SOC

state of charge

t

time

USC

utility side converter

V

bus voltage

V2G

vehicle to grid

V2V

vehicle to vehicle

ZIP

constant-impedance, -current, and -complex power load model

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Published Online: 2017-3-10

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