SFCL Location Selection Considering Reliability Indices

The fault current levels through the electric devices have a significant impact on failure probability. New fault current results in exceeding the rated capacity of circuit breaker and switching equipments and changes operation characteristic of overcurrent relay. In order to solve these problems, SFCL (Superconducting Fault Current Limiter) has rising as one of new alternatives so as to improve these problems. A fault current reduction differs depending on installed location. Therefore, a location of SFCL is very important. Also, SFCL decreases the fault current, and it prevents surrounding protective devices to be exposed to fault current, it then will bring a change of reliability. In this paper, we propose method which determines the optimal location when SFCL is installed in power system. In addition, the reliability about the power system which SFCL was installed is evaluated. The efficiency and effectiveness of this method are also shown by numerical examples and the reliability indices are evaluated in this study at each load points. These results show a reliability change of a system when SFCL was installed.

Authors:

• Wook-Won Kim
• Sung-Yul Kim
• Jin-O Kim

Keywords:

• Superconducting Fault Current Limiter
• OptimalLocation
• Reliability

References:

[1] L. Ye, L. Z. Lin, and K. P. Juengst, "Application studies of superconducting
fault current limiters in electric power systems" IEEE Trans. Superconducti
vity, vol. 12, no. 1, pp.900--903, March 2002.
[2] Ronald N. Allan; Roy Billinton; I.Sjarief, L.Goel, K.S.So "A Reliability Test
System for Educational Purposes Basic Distribution System Data and Resul
lts", IEEE Trans. Power System, vol.6, no.2, pp.813-820, 1991.
[3] Hadi Saadat, "Power System Analysis", Mc Graw Hill, 2004.
[4] M. R. Haghifam, A. Ghaderi, and M. Abapour, "Enhancement Circuit Break
er Reliability by Using Fault Current Limiter", in Proceedings of IEEE PES
09 Conference,
[5] Q. Binh Dam and A. P. Sakis Meliopoulos, "Reliability Implications of Incre
ased Fault Currents and Breaker Failures", iREP 2007, Charleston, SC, US
A, August 2007.
[6] James W. Aquilino, "Report of Transformer Reliability Survey-Industrial Pl
ants and Commercial Buildings", IEEE Trans. Industry Applications, vol. I
A-19, no. 5, pp 858-866, September/October 1983.
[7] Roy Billinton and Ronald N. Allan, Reliability "Evaluation of Power System",
Plenum Press, 1996.
[8] Roy Billinton and Ronald N. Allan, "Reliability Evaluation of Engineering S
ystems", Plenum Press, 1996.