American Journal of Electrical and Electronic Engineering. 2018, 6(1), 16-27
DOI: 10.12691/AJEEE-6-1-3
Original Research

The Effect of Load Modeling on Load Flow Results in Distribution Systems

Nour ali Rostami1 and Mahmoud Oukati Sadegh1,

1Department of Electrical and Electronic Eng, University of Sistan and Baluchestan, Zahedan, Iran

Pub. Date: February 03, 2018

Cite this paper

Nour ali Rostami and Mahmoud Oukati Sadegh. The Effect of Load Modeling on Load Flow Results in Distribution Systems. American Journal of Electrical and Electronic Engineering. 2018; 6(1):16-27. doi: 10.12691/AJEEE-6-1-3

Abstract

Effective utilization of power distribution networks requires extensive studies in such areas as using of capacitors, voltage regulators, network reconfiguration, and so on. Indeed, achieving to accurate answers, and managing appropriate solutions for network problems requires a detailed modeling of the network in the process of the above studies. Among the elements that are important for modeling in network research is network loads. Loads are generally being modeled such as constant power. While load nature is often widespread and different. Failure to have a detailed modeling can lead to non-optimal and even wrong answers, and will result in waste of costs and investments. Since the load flow is the basis of any research in distribution networks, in this paper the effect of load modeling on load flow results which can clarify the importance of the load modeling for other network studies are investigated. What can be inferred from this study is that any study in distribution networks can only lead to optimal results if the load model is accurate. Therefore, attempting to measure necessary load parameters and using their exact modeling methods in distribution networks should be done in order to obtain more accurate results and more savings.

Keywords

load modeling, load flow, distribution network, power loss, voltage profile, backward-forward sweep

Copyright

Creative CommonsThis work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

References

[1]  W.D. Stevenson., Elements of Power System Analysis, McGraw-Hill, 1982.
 
[2]  W.G. Tinney, C.E. Hart., Power Flow Solutions by Newton’s Method, IEEE Transaction on Power Apparatus Systems, Vol. 86, pp. 1449-1457, 1967.
 
[3]  B. Stott, O. Alsac., Fast Decoupled Load Flow, IEEE Trans. Power Apparatus Systems, Vol. 93, No. 3, pp. 859-869, 1974.
 
[4]  S. Iwamoto, Y. Tamura., A Load Flow Calculation Method for Ill-Conditioned Power Systems, IEEE transaction on power apparatus, Vol. 100, No. 4, pp. 1736-1743, 1981.
 
[5]  D. Rajicic, Y. Tamura., A Modification to Fast Decoupled Power Flow for Networks with High R/X Ratios, IEEE Transaction on Power System, Vol. 3, No. 2, pp. 743-746, 1988.
 
[6]  G.W. Stagg, A.H. El-Abiad., Computer Methods in Power System Analysis, McGraw-Hill, 1968.
 
[7]  W. H. Kersting., A Method to Teach the Design and Operation of a Distribution System, IEEE Transactions on Power Apparatus and Systems, Vol.103, No.7, pp. 1945-1952, 1999.
 
[8]  R. A. Stevens, D. T. Rizy, S. L. Purucker., Performance of Conventional Power Flow Routines for Real Time Distribution Automation Application, Proceedings of 18th southeastern symposium on system theory, pp. 196-200, April 1986.
 
[9]  S. Ghosh, D. Das., Method for Load-Flow Solution of Redial Distribution Networks, IEEE Proc-Gener. Transm. Distrib. Vol.146, No. 6, pp.641-648, November 1999.
 
[10]  D. Shirmohammadi, H.W. Hong, A. Semlyen, G.X. Luo., A Compensation-Based Power-Flow Method for Weakly Meshed Distribution and Transmission Networks, IEEE Transaction on Power Systems, Vol. 3, No. 2, pp. 753-762, 1988.
 
[11]  J. H. Teng., A Network-Topology-Based Three-Phase Load Flow for Distribution Systems, Proceeding National Science Council, Republic of China, Vol. 24, No. 4, pp. 259-264, 2000.
 
[12]  J. H. Teng., A Direct Approach for Distribution System Load Flow Solutions, IEEE Transaction on Power Delivery, Vol. 18, No. 3, pp. 882-887, 2003.
 
[13]  S. Mok, S. Elangovan, C. Longjian, M. Salama., A New Approach for Power-Flow Analysis of Balanced Radial Distribution Systems, Electric Machines Power System, Vol. 28, pp. 325-340, 2000.
 
[14]  U. Eminoglu, M. H. Hocaoglu., A New Power Flow Method for Radial Distribution Systems Including Voltage Dependent Load Models, Electrical Power System Research, Vol.76, pp. 106-114, 2005.
 
[15]  Jia Hou, Zhao Xu, Zhao Yang Dong, load Modeling Practice in a Smart Grid Environment, IEEE Conference, 2011.
 
[16]  K. Qian, Ch. Zhou,M. Allan,Y. Yuan., Effect of Load Models on Assessment of Energy Losses in Distributed Generation Planning, Electrical Power Energy Systems, Vol. 33,pp. 1243-1250, 2011.
 
[17]  P. kundur., Power System Stability and Control, second ed., Wiley, New York, pp. 1-1166, 1994.
 
[18]  Mohamed M. Hamada, Mohamed A. A. Wahab, Abou-Hashema M.El-Sayed, Husms. Ramadan., A Proposed Strategy for Capacitor Allocation in Radial Distribution Feeders, IEEE Proc. Int. Conf. pp146-151, 2008.