P. MESTAS, M. C. TAVARES

Copyright © 2013 SciRes. EPE

1171

The representation of the transmission line ideally

transposed or with an actual transposition scheme affects

the results of overvoltages. In the case of three-phase

reclosing, this difference is influenced by the variation of

the line natural frequency and the compensation equip-

ment at the line side.

Regarding the overvoltages mitigation methods, the

use of ZnO surge-arresters with lower rated voltage (396

kV) instead of the surge arresters normally specified (420

kV) is an alternative to limit the overvoltages; however

the use of this method would be more appropriate in

combination with other control method.

For the three-phase reclosing of the studied system, the

controlled switching is an effective method to reduce the

overvoltages. It should be noted that using the proposed

method overvoltages are slightly lower than for the ex-

isting method, however, the proposed method has a great

advantage in reducing the reclosing time, thereby reduc-

ing the interruption time of power supply.

For the three-phase reclosing, the pre-insertion resistor

is not a method as effective for the overvoltage reduction

as in the case of energization, since the overvoltages can

be high if the reclosing occurs near the maximum of the

voltage beat between the circuit breaker contacts.

7. Acknowledgements

This work was supported by a grant from São Paulo Re-

search Foundation-FAPESP and CNPq, Brazil.

REFERENCES

[1] J. A. Martinez, R. Natarajan and E. Camm, “Comparison

of Statistical Switching Results Using Gaussian, Uniform

and Systematic Switching Approaches,” In: Proc. 2000

IEEE Power Engineering Society Summer Meeting, 2000,

Seattle, Vol. 2, pp. 884-889.

[2] A. B. Fernandes and A. C. S. Lima, “Probabilistic

Analysis of Transients Regarding Transmission Lines

Automatic Reclosing" (Portuguese), In: VII Conferência

Brasileira sobre Qualidade da Energia Elétrica (VII

CBQEE), 2007, SP, Brazil.

[3] P. Mestas, M. C. Tavares and A. M. Gole “Implementa-

tion and Performance Evaluation of a Reclosing Method

for Shunt Reactor-Compensated Transmission Lines,”

IEEE Transactions on Power Delivery, Vol. 26, 2011, pp.

954-962.

[4] K. Froehlich, A. C. Carvalho, B. L. Avent, C. Hoelzl, W.

Hofbauer, D. F. Peelo, M. Stanek, P. Hoegg and J. H.

Sawada, “Controlled Closing on Shunt Reactor Compen-

sated Transmission Lines Part II,” IEEE Transactions on

Power Delivery, Vol. 12, No. 2, 1997, pp. 741-746.

doi:10.1109/61.584360

[5] L. Paris, “Basic Considerations of Magnitude Reduction

of Switching Surges Due to Line Energization,” IEEE

Transactions on Power Apparatus and Systems, Vol. 87,

No. 1, 1968, pp. 295-305.

doi:10.1109/TPAS.1968.292002

[6] D. A. Woodford and L. M. Wedepohl, “Transmission

Line Energization with Breaker Pre-Strike,” In: IEEE

WESCANEX 97: Conference on Communications, Power

and Computing, Canada, 1997, pp. 105-108.

[7] D. C. Montgomery and G. C. Runger, “Applied Statistics

and Probability for Engineers – Third Edition,” New

York: John Wiley & Sons, Inc., 2003.

[8] J. R. Marti, L. Marti and H. Dommel, “Transmission Line

Models for Steady-State and Transients Analysis,” In:

IEEE/NTUA Athens Power Tech Conference, 1993,

Greece.

[9] A. Morched, B. Gustavsen and M. Tartibi, “A Universal

Line Model for Accurate Calculation of Electromagnetic

Transients on Overhead Lines and Cables,” IEEE Trans-

actions on Power Delivery, Vol. 14, No. 3, 1999.

doi:10.1109/61.772350

[10] L. Stenstrom and M. Mobedjina, “Limitation of Switch-

ing Overvoltages by Use of Transmission Line Surge Ar-

resters,” In: CIGRE 998 sc 33 International Conference,

Zagreb, 1998.

[11] L. Blahous, “Method for Determining the Time of Re-

closing a Circuit Breaker and Device for Carrying out this

Method,” USA Patent 472439, Feb, 1988.