Simulation results relevant to realistic configurations of medium-voltage (MV) and low-voltage (LV) distribution systems provide useful information to evaluate both the expected level of power quality problems on LV networks due to lightning and the benefits achievable by a proper installation of protection devices. The paper describes a procedure to evaluate lightning overvoltages induced on MV lines by lightning strokes hitting the ground on the line vicinity and that are transferred through the MV-LV transformer on the LV network. To show how the high-frequency model of the transformer play a crucial role in the simulation of transferred overvoltages, the paper presents the results obtained by using two different models identified by means of laboratory measurements.

Note:

Department of Electrical Engineering, University of Bologna, Italy CYME International T and D, Canada

Conference code: 73241

Export Date: 25 April 2012

Source: Scopus

Art. No.: 4524738

doi: 10.1109/PTC.2005.4524738

Language of Original Document: English

Correspondence Address: Borghetti, A.; Department of Electrical Engineering, University of BolognaItaly

References: Gunther, E.W., Mehta, H., A survey of distribution system power quality-preliminary results (1995) IEEE Trans. on Power Delivery, 10 -1, pp. 322-329. , Jan; Porrino, A., Mirra, C., Ardito, A., Nucci, C.A., Lightning overvoltages in low voltage networks (1997) Proc. 14th CIRED, , Birmingham, June 2-5; Rusck, S., Protection of distribution systems Lightning, 2. , R.H. Golde, New York: Academic Press, Chapter 23, 1977; C.A. Nucci, F. Rachidi, Interaction of electromagnetic fields with electrical networks generated by lightning, Chapter 8 of V. Cooray The Lightning Flash: Physical and Engineering Aspects, IEE Power and Energy series 34, IEE Press, 2003Petrache, E., Paolone, M., Rachidi, F., Nucci, C.A., Rakov, V., Uman, M., Jordan, D., Verhaege, T., Experimental Analysis of Lightning-Induced Currents in Buried Cables (2004) Proc. 27th International Conference on Lightning Protection, , Avignon, France, 13-16 September; Pérez, H., Ye, M., Scuka, V., Induced overvoltages in low voltage power installations caused by lightning electromagnetic impulses (1993) Proc. CIGRE Symp. Power Syst. Electromagn. Compat, , Lausanne, Switzerland, Sept, paper 500-04; Galvan, A., Cooray, V., Thottappillil, R., A technique for the evaluation of lightning-induced voltages in complex low-voltage power-installation networks (2001) IEEE Trans. on EMC, 43 -3, pp. 402-409. , Aug; Høidalen, H.K., Dahlslett, J.H.F., Aalborg, T., Impacts of Lightning-induced Overvoltages on Power Quality in Low-Voltage Distribution Systems (2000) Proc. of the 25th International Conference on Lightning Protection, , Rhodes, Greece, 18-22 September; Borghetti, A., Iorio, R., Nucci, C.A., Pelacchi, P., Calculation of voltages induced by nearby lightning on overhead lines terminated on distribution transformers (1995) Proc. of 1 st International Conference on Power Systems Transients, , Lisbon, Portugal; Manyahi, M.J., Thottappillil, R., Simplified model for estimation of lightning induced transient transfer through distribution transformer (2005) Electrical Power and Energy Systems, 27, pp. 241-253; Vaessen, P.T.M., Transformer model for high frequencies (1988) IEEE Trans. on Power Delivery, 3-4, pp. 1761-1768. , Oct; Wilcox, D.J., Hurley, W.G., McHale, T.P., Conlon, M., Application of modified modal theory in the modelling of practical transformers (1992) IEE Proceedings-C, 139 -6, pp. 513-520. , Nov; Morched, A., Martí, L., Ottevangenrs, J., A high-frequency transformer model for the EMTP (1993) IEEE Trans. on PWRD, 8 -3, pp. 1615-1626. , Jul; Gustavsen, B., Frequency-dependent modeling of power transformers with ungrounded windings (2004) IEEE Trans. on PWRD, 19 -3, pp. 1328-1334. , Jul; Nucci, C.A., Rachidi, F., Ianoz, M., Mazzetti, C., Lightning-induced overvoltages on overhead lines (1993) IEEE Trans. on EMC, 35 -1, pp. 75-86; Rachidi, F., Nucci, C.A., Ianoz, M., Mazzetti, C., Influence of a lossy ground on lightning-induced voltages on overhead lines (1996) IEEE Trans. on EMC, 38 -3, pp. 250-264; M. Paolone, PhD Thesis Modeling of lightning-induced voltages on distribution networks for the solution of power quality problems, and relevant implementation in a transient program, University of Bologna, Department of Electrical Engineering, March 2002Borghetti, A., Gutierrez, J.A., Nucci, C.A., Paolone, M., Petrache, E., Rachidi, F., Lightning-induced voltages on complex distribution systems: Models, advanced software tools and experimental validation (2004) Journal of Electrostatics, 60, pp. 163-174. , 2-4, pp, Elsevier; Agrawal, A.K., Price, H.J., Gurbaxani, S.H., Transient response of a multiconductor transmission line excited by a nonuniform electromagnetic field (1980) IEEE Trans. on EMC, 22, pp. 119-129; Rachidi, F., Nucci, C.A., On the Master, Lin, Uman, Standler and the Modified Transmission Line lightning return stroke current models (1990) Journal of Geophysical Research, 95, pp. 20389-20394; Rubinstein, M., An approximate formula for the calculation of the horizontal electric field from lightning at close, intermediate, and long range (1996) IEEE Trans. on EMC, 38, pp. 531-535. , Aug; Cooray, V., Some considerations on the "Cooray-Rubinstein" formulation used in deriving the horizontal electric field of lightning return strokes over finitely conducting ground (2002) IEEE Trans. on EMC, 44, pp. 560-566. , Nov; Nucci, C.A., Borghetti, A., Piantini, A., Janiszewski, J.M., Lightninginduced voltages on distribution overhead lines: Comparison between experimental results from a reduced-scale model and most recent approaches (1998) Proc. 24 th Int. Conf. on Lightning Protection, , Birmingham, September; Paolone, M., Schoene, J., Uman, M., Rakov, V., Jordan, D., Rambo, K., Jerauld, J., Petrache, E., Testing of the LIOV-EMTP96 Code for Computing Lightning-Induced Currents on Real Distribution Lines: Triggered-Lightning Experiments (2004) Proc. of the 27th International Conference on Lightning Protection, , Avignon, France, 13-16 September; Electromagnetic Transient Program (EMTP) Rule Book, Bonneville Power Administration, Portland, Oregon, 1984Gustavsen, B., Semlyen, A., Rational approximation of frequency domain responses by vector fitting (1999) IEEE Trans. on PWRD, 14 -3, pp. 1052-1061. , Jul; Gustavsen, B., Semlyen, A., Enforcing passivity for admittance matrices approximated by rational functions (2001) IEEE Trans. on Power Systems, 16 -1, pp. 97-104. , Feb; Mousavi, A.M., Frequency-domain equivalents for passive networks (1999), Ph.D. Thesis, University of Toronto, Department of Electrical and Computer EngineeringCoelho, C.P., Phillips, J., Silveira, L.M., A convex programming approach for generating guaranteed passive approximations to tabulated frequency-data (2004) IEEE Trans. on Computer-Aided Design of Integrated Circuits and Systems, 23 -2, pp. 293-301. , Feb