Coordinated Voltage Control using Multiple Regulators in Distribution System with Distributed Generators

Authors: R. Shivarudraswamy, D. N. Gaonkar

Abstract:

The continued interest in the use of distributed generation in recent years is leading to the growth in number of distributed generators connected to distribution networks. Steady state voltage rise resulting from the connection of these generators can be a major obstacle to their connection at lower voltage levels. The present electric distribution network is designed to keep the customer voltage within tolerance limit. This may require a reduction in connectable generation capacity, under utilization of appropriate generation sites. Thus distribution network operators need a proper voltage regulation method to allow the significant integration of distributed generation systems to existing network. In this work a voltage rise problem in a typical distribution system has been studied. A method for voltage regulation of distribution system with multiple DG system by coordinated operation distributed generator, capacitor and OLTC has been developed. A sensitivity based analysis has been carried out to determine the priority for individual generators in multiple DG environment. The effectiveness of the developed method has been evaluated under various cases through simulation results.

Keywords: Distributed generation, voltage control, sensitivity factor.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1058201

References:

[1] J. P. P. Barker and R.W. de Mello, "Determining the impact of Distributed Generation on power systems: Part 1ÔÇöRadial distribution systems," in Proc. IEEE Power Eng. Soc. Summer Meeting, vol. 3, 2000, pp.1645-1656.
[2] C. L. Masters, "Voltage rise, the big issue when connecting embedded generation to long 11 kV overhead lines," IEE. Power Eng.J. vol. 16, issue 1, pp. 5-12. Feb. 2002.
[3] N. Jenkins, R. Allan, P. Crossley, D. Kirsehen and G. Strbac, "Embedded Generation," IEE Power and Energy Series, London, 2000.
[4] N. C. Scott, D. J. Atkinson and J. E. Morrell, "Use of Load Control to Regulate Voltage on Distribution Networks with Embedded Generation," IEEE Trans. on Power Systems, Vol. 17, No. 2, pp. 510- 515, May 2002.
[5] P. H. Nguyen, J. M. A. Myrzik, and W. L. Kling, "Coordination of Voltage Regulation in Active Networks," In Proc of IEEE Int. Conf. on Trans & Distri ,2008.
[6] Johan Morren, Sjoerd W.H.de Haan,and J.A.Ferreira,"Contribution of DGunits to Voltage control Active and Reactive Power limitations" , IEEE conf on power tech, 2005
[7] J. H. Choi and Jae-Chul Kim, "Advanced Voltage Regulation Method of Power Distribution Systems Interconnected with Dispersed Storage and Generation Systems," IEEE Trans. on Power Systems, Vol. 16, No. 2, pp. 329-334, April 2001.
[8] F. A. Viawan, A. Sannino and J. Daalder, "Voltage Control with On- Load Tap Changers in Medium Voltage Feeders in Presence of Distributed Generation," Electrical Power System Research J, Vol.17 ,No.10, pp.1314-1322, August 2007.
[9] T. Niknam, A.M. Ranjbar, A.R. Shirani, "Impact of Distributed Generation on Volt /Var Control in Distributed Network," in Proc. Int.Conf. on Power Tech, Vol.3, June 2003, pp.1-7.
[10] O. Richardot, A. Viciu, Y. Bésanger, N. Hadjsaïd and C. Kieny, "Coordinated Voltage Control in Distribution Networks Using Distributed Generation," in Proc. of IEEE/ PES Transmission & Distribution Conf. 2006.
[11] D. Das," Optimal placement of capacitors in radial distribution system using a Fuzzy-GA method", Electrical Power and Energy Systems J, Vol. 30, No. 2, pp. 361-367, 2008.
[12] Dheeraj Kumar Khatod, Vinay Pant, and Jaydev Sharma," A Novel Approach for Sensitivity Calculations in the Radial Distribution System" IEEE Transactions on Power Delivery, vol. 21, no. 4,pp.2048- 2057, October 2006 .
[13] K.R.W. Bell & D.S. Kirschen, "Improved Sensitivities in MW Dispatch for Control of Voltage," IEEE Transactions on Power Systems, Vol. 15, No. 3, pp.1034- 1040, 2000.
[14] Miroslav M. BegoviC, Arun G. Phadke, "Control of Voltage Stability Using SensitIvity Analysis"IEEE Transactions on Power Systems, Vol.7, No. 1, pp.114-123,February 1992.
[15] V. Kumar, I. Gupta, H.O. Gupta and C.P. Agarwal. "Voltage and current sensitivities of radial distribution network: a new approach," IEE Proc.- Gener. Transm. Distrib. Vol. 152 No. 6, pp.813-818, November 2005.
[16] Qing Zhong Yao Zhang Jianshe Zhang Zhigang Wu, "Voltage Sensitivity Analysis in Voltage Support of the China Southern Power Grid," In Proc Int. Conf. on Power System Tech, 2006.