Fuzzy based DG allocation for Loss Minimization in a Radial Distribution System

Abstract

Due to the restructuring in electricity market and environmental concerns penetration level of DG unit has been increased rapidly. It is also playing a significant role in minimization of line losses of a power system network. So it is very important to define the size and location of distributed generation unit to be allocated in a power system network. On the other hand due to radial distribution systems basic inherent features such as radial structure, a wide range of 𝑿𝑹⁄ ratios, and a large number of nodes; the optimal sizing and siting problem of a DG unit cannot be determined by the conventional techniques, which are used for transmission systems. A novel method for the estimation as well as minimization of losses in a radial distribution system with DG unit has been presented in this paper. It also improves the voltage profile of the existing power systems and in addition a combined and optimal power factor is also calculated. An algorithm is presented in this paper to obtain the optimum position of DG units in the distribution network based on the available amount of DG using Fuzzy logic. Forward backward sweep method makes the load flow solution faster. Test results on a 33-bus system reveal that the superiority and simplicity of the proposed algorithm.

Keywords

• Fuzzy logic,distributed Generation,loss reduction,optimal location,optimal size

References

1. [1] R.S Rao, K Ravindra, K. Satish and S.V.L Narasimham, “Power loss minimization in distribution system using network reconfiguration in the presence of distributed generation.” IEEE Transactions on Power system, vol. 28, no. 1, pp. 317-325, Feb. 2013.
2. [2] P. Chiradeja and R. rajkumar, “An approach to quantify the technical benefits of distributed generation.” IEEE Transactions on Energy Conversion, vol. 19, no. 4, pp. 764-773, Dec. 2004.
3. [3] R.A. Gallego, A.J. Monticelli and R. Romero, “Optimal capacitor placement in radial distribution networks.” IEEE Transactions on Power Systems, vol. 16, no. 4, pp. 630-637, Nov. 2001.
4. [4] Y.H. song, G.S. Wang, A.T Johns and P.Y Wang, “Distribution network reconfiguration for loss reduction using fuzzy controlled evolutionary technique.” Proceedings. IEE, Generation Transmission and Distribution, vol. 144, no. 4, pp. 345-350, Jul. 1997.
5. [5] T.N Shukla, S.P Singh, V Srinivasrao and K.B. Naik, “Optimal sizing of distributed generation placed on radial distribution system.” Electric Power Components Systems, vol. 38, no. 3, pp. 260-274, 2010.
6. [6] M. Raoofat and A.R. Malekpour, “Optimal allocation of distributed generation and remote controllable switches to improve the network performance considering operating strategies of distributed generations.” Electric Power components systems, vol. 39, no. 16, pp. 1809-1827, 2011.
7. [7] El-Hattam and M.M.A Salama, “Distributed generation technologies, definitions and benefits.” Electric Power system Research, vol. 71, no. 2, pp. 119-128, 2004.
8. [8] M. Gomez-Gonzalez, F.J Ruiz-Rodriguez and F. Jurado, “A binary SFLA for probabilistic three-phase load flow in unbalanced distribution systems with technical constraints.” International Journal of Electric Power and energy Systems, vol. 48, no. 1, pp. 48-57, 2011.

9. [9] T.D.T Naguyen, J. ruan, Q.N. Naguyen, N.G. Lee, D. Tan and L. Hu, “Study of Economical-technical impacts of distributed generation on medium voltage grid.” Telkomnika, vol. 12, no. 2, pp. 1177-1187, 2014.
10. [10] A.S.A Awad, T.H.M El-Fouly and M.M.A. Salama, “Optimal distributed generation allocation and load shedding for improving distribution system reliability.” Electric Power Components Systems, vol. 42, no. 6, pp. 576-584, 2014.
11. [11] N.S. Rau and Y.H. Wan, “Optimal location of resources in distributed planning.” IEEE Transactions on Power Systems, vol. 9, no. 4, pp. 2014-2020, 1994.
12. [12] H.L. Willis, “Analytical methods and rules of thumb for modeling DG distribution interaction.” In Proccedings of IEEE Power Energy Society summer meeting 2000, pp. 1643-1644.
13. [13] Wang C, Nehrir MH, “Analytical approaches for optimal placement of distributed generation sources in power system.” IEEE Transaction on Power System, vol. 19, no. 4, pp. 2068-2076, 2004.
14. [14] P.M. Costa and M.A. Matos, “Avoided losses in a LV networks as a result of microgeneration.” Electric Power System Research, vol. 79, no. 4, pp. 629-634, 2009.
15. [15] T. Gozel, M.H.Hocaoglu, “An analytical method for the sizing and siting of the distributed generators in radial system.” Electrical Power System and research, vol. 79, no. 6, pp. 912-918, 2009.