American Journal of Electrical and Electronic Engineering

ISSN (Print): 2328-7365

ISSN (Online): 2328-7357

Editor-in-Chief: Naima kaabouch




Electric Power Transmission Enhancement: A Case of Nigerian Electric Power Grid

1Electrical and Computer Engineering Department, North Carolina A&T State University, Greensboro NC, USA

2Electrical Engineering Department, University of Port Harcourt, PortHarcourt, Nigeria

3Electrical and Electronic Engineering Department, Federal University of Oye-Ekiti, Ekiti State Nigeria

American Journal of Electrical and Electronic Engineering. 2016, 4(1), 33-39
doi: 10.12691/ajeee-4-1-5
Copyright © 2016 Science and Education Publishing

Cite this paper:
Emmanuel U. Oleka, Samuel N. Ndubisi, Gerald K. Ijemaru. Electric Power Transmission Enhancement: A Case of Nigerian Electric Power Grid. American Journal of Electrical and Electronic Engineering. 2016; 4(1):33-39. doi: 10.12691/ajeee-4-1-5.

Correspondence to: Emmanuel  U. Oleka, Electrical and Computer Engineering Department, North Carolina A&T State University, Greensboro NC, USA. Email:


Increase in economic activities resulting from increase in population and social advancement has led to increase in electrical energy demands. This has increased the burdens on the existing transmission assets and in some cases, has caused the loading of the transmission assets beyond their design limits with consequent reduction in power quality and power outages in extreme cases. Many techniques have been developed to enhance the capabilities of the power grids. This paper looks into these techniques with the view to exploring their applicability to the Nigerian 330KV electric power grid, towards seeking ways to enhancing the performance of the grid for better asset utilization. A typical transmission line in the grid was modeled to assess its strengths and weaknesses. Enhancement techniques were then applied to assess their impacts on the line.



[1]  US-Canada-Power-System_Outage-Task-Force, “Final Report on the August 14, 2003 Blackout in the United States and Canada: Causes and Reecommendations,” 2004. [Online] Available:
[2]  L. Furby, P. Slovic, B. Fischhoff, and R. Gregory, “Public perceptions of electric power transmission lines,” Journal of Environmental Psychology, vol. 8, pp. 19-43, 1988.
[3]  UNITED-NATIONS, “Multi Dimensional Issues in International Electric Power Grid Interconnections” United Nation Department of Economic and Social Affiars, 2006, [Online]. Available:
[4]  NERC, “NERC Policy 2: Transmission,” [Online] Available: %20Markup.pdf.
[5]  B. E. Dikki, “Update-Privatization Issues,” ed: A presentation at the 1st National Council on Power Conference (NACOP) Abuja Nigeria, August 11, 2014.
Show More References
[6]  H. Saadat, “Power System Analysis,(2nd),” ed: McGraw-Hill Higher Education, 2009.
[7]  J. Verboomen, D. Van Hertem, P. H. Schavemaker, W. L. Kling, and R. Belmans, “Phase shifting transformers: principles and applications,” in Proceedings of the IEEE 2005 International Conference on Future Power Systems, 2005, pp. 6 pp.-6.
[8]  L. Gyugyi, “Application characteristics of converter-based FACTS controllers,” in Proceedings of the IEEE International Conference on Power System Technology, PowerCon., 2000, pp. 391-396.
[9]  E. Wirth and A. Kara, “Innovative power flow management and voltage control technologies,” Power Engineering Journal, vol. 14, pp. 129-140, 2000.
[10]  H. Jin and X. Wilsun, “Extended transmission line loadability curve by including voltage stability constrains,” in Proceedings of the IEEE 2008 Electric Power Conference, EPEC, Canada, 2008, pp. 1-5.
[11]  R. Gutman, P. Marchenko, and R. Dunlop, “Analytical development of loadability characteristics for EHV and UHV transmission lines,” IEEE Transactions on Power Apparatus and Systems, pp. 606-617, 1979.
[12]  WESTERN-AREA-POWER-ADMINISTRATION, “Transmission Enhancement Technology Report “July 2002 [Online]. Available:
[13]  EEI, “Transmission Projects: At A Glance,” Edison Electric Institute, 2015. [Online] Available:
[14]  H. S. Labo, “Current status and future outlook of the transmission network,” in Investors' Forum for the Privatization of PHCN Successor Companies, Abuja Nigeria, January 18, 2010.
[15]  J. U. Ndiagwalukwe, “Frequency Control and Grid Stability,” National Power Summit, Abuja Nigeria, December, 2012.
[16]  I. Samuel, J. Katende, S. A. Daramola, and A. Awelewa, “Review of System Collapse Incidences on the 330-kV Nigerian National Grid,” International Journal of Engineering Science Invention, vol. 3, pp. 55-59, 2014.
[17]  Presidential Task Force on Power, 2014 Year In Review, Annual Report of the Presidential Task Force on Power (PTFP), 2015.
[18]  C. C. Okoro and K. C. Achugbu, “Performance Analysis and Indices for the Existing Nigerian 330KV National Power Grid,” in Proceedings of International Conference and Exhibition on Power and Telecommunication, ICEPT, Abuja Nigeria, 2008.
Show Less References


Optimal Placement of D-STATCOMs into the Radial Distribution Networks in the Presence of Distributed Generations

1Department of Power System Engineering, Roudsar and Amlash Branch, Islamic Azad University, Roudsar, Iran

2Department of Electrical Engineering, Khodabandeh Branch, Islamic Azad University, Khodabandeh, Iran

American Journal of Electrical and Electronic Engineering. 2016, 4(2), 40-48
doi: 10.12691/ajeee-4-2-1
Copyright © 2016 Science and Education Publishing

Cite this paper:
Babak Safari Chabok, Ahmad Ashouri. Optimal Placement of D-STATCOMs into the Radial Distribution Networks in the Presence of Distributed Generations. American Journal of Electrical and Electronic Engineering. 2016; 4(2):40-48. doi: 10.12691/ajeee-4-2-1.

Correspondence to: Ahmad  Ashouri, Department of Electrical Engineering, Khodabandeh Branch, Islamic Azad University, Khodabandeh, Iran. Email:


This paper proposes a combination of Discrete Imperialistic Competition and Nelder-Mead algorithms to solve D-STATCOMs placement optimization problem. It is assumed that optimal number, locations and sizes of D-STATCOMs are determined in radial distribution network while Distributed Generations are previously installed in it. Indeed, we focus on voltage control and concept of reactive power management in annual scheduling time interval. Objective function is defined in terms of network active power losses and voltage stability characteristic at different load levels by appropriate weighting factors. Voltage Stability Index (VSI) is applied to identify the weak buses in radial distribution network. To validate performance and effectiveness of proposed DICA-NM hybrid algorithm, simulation studies are applied on the 30-bus IEEE radial distribution test feeder. Finally, numerical results for some important network variables have been compared in three different case studies.



[1]  Y. Del Valle, J.C. Hernandez, G.K. Venayagamoorthy, and R.G. Harley,“ Multiple STATCOM allocation and sizing using particle swarm optimization,” In: IEEE conference power systems and exposition, pp. 1884-1891, 2006.
[2]  S.A. Taher, M.K. Amooshahi ,“Optimal placement of UPFC in power systems using immune algorithm,” Simulation Modeling and Practice Theory, Vol. 19, No. 5, pp. 1399-412, 2011.
[3]  M. Farhoodnea, A. Mohamed, H. Shareef, H. Zayandehroodi, “Optimum D-STATCOM placement using firefly algorithm for power quality enhancement,” IEEE 7th International Power Engineering and Optimization Conference (PEOCO), pp. 98-102, June 2013.
[4]  S.A. Taher, and S.A. Afsari,“Optimal location and sizing of D-STATCOM in distribution systems by immune algorithm,” International Journal of Electrical Power&Energy Systems, Vol. 60, pp. 34-44, Sep. 2014.
[5]  H. Hamouda, K. Zehar, “ Efficient Load Flow Method for Radial Distribution Feeders”, Journal of Applied Sciences, Vol. 6, No. 13, pp. 2741-2748, 2006.
Show More References
[6]  A. Losi and M. Russo, “Dispersed Generation Modeling for Object-Oriented Distribution Load Flow,” IEEE Transactions on Power Delivery, vol. 20, no. 2, pp. 1532-1540, 2005.
[7]  H. Chen, J. Chen, D. Shi, and X. Duan, “Power Flow Study and Voltage Stability Analysis for Distribution Systems with Distributed Generation,” in Power Engineering Society General Meeting, june2006, IEEE (PP. 8-PP).
[8]  S.M. Moghaddas-Tafreshi and E. Mashhour, “Distributed Generation Modeling for Power Flow Studies and a Tree-Phase Unbalanced Power Flow Solution for Distribution Systems Considering Distributed Generation,” Electric Power System Research, vol. 79, pp. 680-686, 2009.
[9]  K. Somsai, T. Kulworawanichpong, “Modeling, simulation and control of DSTATCOM using ATP/EMTP,” In: 13th IEEE conference harmonics and quality of power, pp. 1-4, 2008.
[10]  M. Hosseini, H.A. Shayanfar, M. Fotuhi, “Modeling of series and shunt distribution facts devices in distribution load flow,” Journal Electrical System, pp. 1-12, 2008.
[11]  G. Brownell, H. Clarke, “Analysis and solutions for bulk system voltage instability,” IEEE Computer Applications in Power Systems, Vol. 2, No. 3, pp. 31-35, 1989.
[12]  M. Chakravorty, D. Das,“Voltage stability analysis of radial distribution networks,” Electrical Power and Energy Systems, Vol. 23, pp.129-135, Elsevier Journal (2001).
[13]  L. Dasilva, S. Carneiro, E. DeOliveira, E. DeSouzaCosta, J. RezendePereira, P. Garcia,“ A heuristic constructive algorithm for capacitor placement on distribution systems,” IEEE Transaction on Power System, vol. 23, no. 4, pp.1619-1626, Nov. 2008.
[14]  E. Lakervi, E.J. Holmes, “Electricity distribution network design,” IET, No. 21, 1996.
[15]  E. Atashpaz-Gargari, C. Lucas, “Imperialist Competitive Algorithm: An Algorithm for Optimization inspired by Imperialistic Competition,” IEEE Congress on Evolutionary Computation, vol. 7, pp. 4661-4667, Sept. 2007.
[16]  L.D.S. Coelho, L. D. Afonso and P. Alotto, “A modified imperialist competitive algorithm for optimization in electromagnetic,” vol. 48, no. 2, pp.579-582, Feb. 2012.
[17]  G. Zhang, J. Peng, “Improved ICA for Constrained optimization,” International forum on computer science technology and application, pp.204-207, 2009.
[18]  J.A. Nelder, R. Mead, “A simplex for function minimization,” The computer journal, vol. 7, pp. 308-313, 1965
[19]  Z.H. Wang, H. Chen, and G.A. Taylor, “Volt/Var Control in Distribution Systems Using a Time-Interval Based Approach,” IEE proceedings Generation Transmission & Distribution, vol. 150, no. 5, pp. 548-554, September2003.
[20]  F. Viawan and D. Karlsson, “Voltage and Reactive Power Control in Systems with Synchronous Machine-Based Distributed Generation,” IEEE Transactions on Power Delivery, vol. 23, no. 2, pp. 1079-1087, 2008.
Show Less References


A Review on Hybrid Controller Using Soft Computing Algorithms

1Department of Electrical Engineering, IFTM University, Moradabad(U.P.), India

2Department of Electrical Engineering, ABESIT, Ghaziabad (U.P.), India

American Journal of Electrical and Electronic Engineering. 2016, 4(2), 49-61
doi: 10.12691/ajeee-4-2-2
Copyright © 2016 Science and Education Publishing

Cite this paper:
Lokesh Kumar Agrawal, Bhavesh Kumar Chauhan, G. K. Benerjee. A Review on Hybrid Controller Using Soft Computing Algorithms. American Journal of Electrical and Electronic Engineering. 2016; 4(2):49-61. doi: 10.12691/ajeee-4-2-2.

Correspondence to: Lokesh  Kumar Agrawal, Department of Electrical Engineering, IFTM University, Moradabad(U.P.), India. Email:


Aadaptability and self-organization of a system is two key factors, when it comes to how well the system is surviving for the changes to the environment and how these work within the plant. Different tuning methods and soft computing techniques improve these two factors in controllers. Considering the increasing complexity of dynamic systems along with their need for feedback controls, using more complicated controls has become necessary and these techniques can be a suitable response to this necessity. This paper briefly describes a review on different techniques used for PID tuning as well as soft computing algorithm for hybrid controllers. This paper provides a comprehensive reference source for people working with hybrid controllers.



[1]  Emad Ali, “Automatic Fuzzy Tuning of Proportional-Integral Controller Based on Time-Domain Specification”, Journal of King Saud University, 17, Eng. Sci. (2), 171-196, 2005.
[2]  Hari Om Bansal, Rajamayyoor Sharma, P. R. Shreeraman, “PID Controller Techniques: A Review”, Journal of Control Engineering and Technology, Volume 2, Issue 4, October 2012, Pages 168-176.
[3]  Amit Kr Singh, Manjari Mehrotra, and AK Pandey, “Improvement of the Performance of Different Order System with Adaptive Fuzzy PID Controller”, VSRD-IJEECE, Volume 2, Issue 2, 27-38, 2012.
[4]  Prajakta S.Taywade, K.N.Kasat, “A Review on Implementation of Neuro-fuzzy PID Controller using FPGA”, International Journal of Engineering Research and General Science, Volume 3, Issue 1, January-February 2015, Pages 1145-1152.
[5]  Y.M. Zhao, W.F. Xie, X.W. Tu , “Performance-based parameter tuning method of model-driven PID control systems”, ISA Transactions, Volume 51, Issue 3, May 2012, Pages 393-399.
Show More References
[6]  Mohamed S. Zaky, “A self-tuning PI controller for the speed control of electrical motor drives”, Electric Power Systems Research, Volume 119, February 2015, Pages 293-303.
[7]  Dao Thanh Liem, Dinh Quang Truong, Kyoung Kwan Ahn, “A torque estimator using online tuning grey fuzzy PID for applications to torque-sensorless control of DC motors”, Mechatronics, Volume 26, March 2015, Pages 45-63.
[8]  Juing-Shian Chiou, Shun-Hung Tsai, Ming-Tang Liu, “A PSO-based adaptive fuzzy PID-controllers”, Simulation Modelling Practice and Theory, Volume 26, August 2012, Pages 49-59.
[9]  Rajani K. Mudi, Chanchal Dey, Tsu-Tian Lee, “An improved auto-tuning scheme for PI controllers”,ISA Transactions, Volume 47, Issue 1, January 2008, Pages 45-52.
[10]  Chanchal Dey, Rajani K. Mudi, “An improved auto-tuning scheme for PID controllers,”ISA Transactions, Volume 48, Issue 4, October 2009, Pages 396-409.
[11]  Muguo Li, Da Liu, “A Novel Adaptive Self-turned PID controller based on Recurrent-Wavelet-Neural-Network for PMSM Speed Servo Drive System”, Procedia Engineering, Volume 15, 2011, Pages 282-287.
[12]  Muawia A. Magzoub, Nordin B. Saad, Rosdiazli B. Ibrahim, “Efficiency Improvement of Induction Motor Variable Speed Drive Using a Hybrid Fuzzy-fuzzy Controller”, Energy Procedia, Volume 75, August 2015, Pages 1529-1535.
[13]  Sakuntala Mahapatra, Raju Daniel, Deep Narayan Dey, Santanu Kumar Nayak, “Induction Motor Control Using PSO-ANFIS”, Procedia Computer Science, Volume 48, 2015, Pages 753-768.
[14]  Sharda Patwa, “Control of starting current in three phase induction motor using fuzzy logic controller,” International Journal of Advanced Technology in Engineering and Science, Volume 1,Issue 12, pages 27-32, December 2013.
[15]  P.M.Menghal, A.Jaya Laxmi, “Adaptive Neuro Fuzzy based dynamic simulation of induction motor drives”, IEEE International Conference Fuzzy Systems (FUZZ-IEEE 2013) 7-10 July 2013.
[16]  P.M.Menghal, A.Jaya Laxmi, N.Mukhesh, “Dynamic simulation of induction motor drive using neuro controller”, International Journal on Recent Trends in Engineering and Technology, Volume 10, Issue 2, January 2014.
[17]  Ahmed J. Fattah, Ikhlas Abdel-Qader, “Performance and Comparison Analysis of Speed Control of Induction Motors using Improved Hybrid PID-Fuzzy Controller”, Electro/Information Technology (EIT), 2015 IEEE International Conference on Year 2015, Pages 575-580.
[18]  Mohammed Abdelbar Shamseldin and Adel A. EL-Samahy, “Speed Control of BLDC Motor by using PID Control and Self-tuning Fuzzy PID Controller”, 15th International Workshop on Research and Education in Mechatronics (REM), September 9-11, 2014, IEEE Conference Publication.
[19]  Bemal K. Bose, “Modern Power Electronics and Ac Drives”, 1st ed., Bernard Goodwin, Ed. USA: Prentice Hall, Inc., 2002.
[20]  Raul Rojas, “Neural Network a Systematic Introduction”, Springer-Verlag, Berlin 1996.
Show Less References