Energization of a Half-Wavelength Transmission Line - Pre-Operational Transients Studies

Camilo Machado Jr, Marcelo Maia, Eden Carvalho Jr, Maria C. Tavares, João B. Gertrudes, Elson C. Gomes, Walmir Freitas, Marcos A. Paz, Fernando A. Moreira, Carlos A. Floriano, Vanderlei G. Machado, Aniela M. Mendes

CHESF, Recife, Brazil.
ELETRONORTE -Brasília, Brazil.
ENTE, S?o Paulo, Brazil.
Federal University of Bahia, Salvador, Brazil.
State University of Feira de Santana, Feira de Santana, Brazil.
University of Campinas, Campinas, Brazil.

DOI: 10.4236/epe.2013.54B276                

Abstract

In the present paper the main results of the pre-operational studies related to the energization maneuver of a Half-Wavelength Transmission Line (AC-Link), are presented. The simulations were performed in PSCAD with actual Brazilian system data. Specifically the following studies were performed: electromagnetic transient studies of energization maneuver considering no fault and the occurrence of fault along the trunk; dynamic analysis of generator units that will energize the AC-Link; TRV on the circuit-breaker that will energize the trunk. The main conclusion is that the AC-Link energization experiment can be implemented without jeopardizing or causing time-life reduction of the equipment involved in the experiment, which comprises the generator unit that will energize the trunk, the step-up transformer, the arresters that will be kept during the experiments, as well as the circuit-breaker that will energize and then trip the AC-Link.

Keywords

Electromagnetic Transients; Half-wavelength Transmission; AC-Link; Energization Test; Dynamic Analysis; TRV; Faults

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	C. Portela, J. Silva and M. Alvim, “Non-Conventional AC Solutions Adequate for Very Long Distance Transmission-An Alternative for the Amazon Transmission System,” Proceedings of 2007 IEC/CIGRE UHV Symposium Beijing, article 2-2-5, Beijing, China, 2007, p. 29.
[2]	F. J. Hubert and M. R. Gent, "Half-Wavelength Power Transmission Lines," Power Apparatus and Systems, IEEE Transactions on, Vol. 84, No. 10, 1965, pp. 965-974. doi:10.1109/TPAS.1965.4766125
[3]	F. S. PrabhakAra, K. Parthasarathy and H. N. R. Rao, “Analysis of Natural Half-Wave-Length Power Transmission Lines,” Power Apparatus and Systems, IEEE Transactions on, Vol. PAS-88, No. 12, 1969, pp. 1787-1794.
[4]	F. M. Gatta and F. Iliceto, "Analysis of Some Operation Problems of Half-wave Length Power Transmission Lines," AFRICON '92 Proceeding of 3rd AFRICON Conference, 22-24 Sep 1992, pp. 59-64.
[5]	C. Portela, “Some Aspects of Very Long Lines Switching - CIGRE SC 13 Colloquium 1995,” Florianópolis, Brazil, 1995, p. 12.
[6]	J. L. Alqueres and J. C. Praca, "The Brazilian Power System and the Challenge of the Amazon Transmission," in Proceedings of 1991 IEEE PES T&D Conference, pp. 315-320.
[7]	M. C. Tavares and C. M. Portela, “Proposition of a Half-Wave Length Energization Case Test,” International Conference on Power Systems Transients (IPST’09) Kyoto, Japan, IPST 2009.
[8]	E. C. Gomes and M. C. Tavares, "Analysis of the Energization Test of a Half-Wavelength AC-Link Composed of Similar Transmission Lines," Power and Energy Engineering Conference (APPEEC), 2011 Asia-Pacific, 2011, pp. 1-5.
[9]	Y. Song, B. Fan, Y. Bai, X. Qin and Z. Zhang, "Reliability and Economic Analysis of UHV Half-Wave-length AC Transmission," Transmission. In Power System Technology (POWERCON), 2012 IEEE International Conference on, New Zealand, Oct. 2012.
[10]	C. M. Portela, M. C. Tavares, J. P. Filho and J. B.Gertrudes, “Earth Conductivity and Permittivity Data Measurements - Influence in Transmission Line Transient Performance,” Electric Power Systems Research, Vol. 76, No. 11, 2006, pp. 907-915. doi:10.1016/j.epsr.2005.11.006
[11]	E. C. Gomes, M. C. Tavares and C. Floriano, "Using Conventional Protection for Line-to-ground Fault at AC-Link,” IPST, Vancouver, Canada, 2013.
[12]	J. B. Gertrudes, E. C. Gomes and M. C. Tavares, “Circuit Breaker TRV on AC-Link Trunk with a Little More than Half-wavelength,” IPST 2013.
[13]	R. Fabián and M. C. Tavares, “Using of Conventional Relays for Protecting AC-Link from Three-Phase Faults,” IPST 2013.