Browse > Article
http://dx.doi.org/10.5370/JEET.2007.2.3.294

A Special Protection Scheme Against a Local Low-Voltage Problem and Zone 3 Protection in the KEPCO System  

Yun, Ki-Seob (South Seoul Power Transmission Center, Korea Electric Power Corporation)
Lee, Byong-Jun (Advanced Power Systems Research Center(APSRC), Korea University)
Song, Hwa-Chang (School of Electronic and Information Engineering, Kunsan National University)
Publication Information
Journal of Electrical Engineering and Technology / v.2, no.3, 2007 , pp. 294-299 More about this Journal
Abstract
This paper presents a special protection scheme, which was established in the KEPCO (Korea Electric Power Corporation) system, against a critically low voltage profile in a part of the system after a double-circuit tower outage. Without establishing the scheme, the outage triggers the operation of a zone 3 relay and trips the component. This sequence of events possibly leads to a blackout of the local system. The scheme consists of an inter-substation communication network using PITR (Protective Integrated Transmitter and Receiver) for acquisition of the substations' data, and under-voltage load shedding devices. This paper describes the procedure for determining the load shedding in the scheme and the experiences of the implementation.
Keywords
KEPCO system; Local blackout; Low-voltage problem; Special protection scheme; Zone 3 protection;
Citations & Related Records
연도 인용수 순위
  • Reference
1 C. W. Taylor, 'Concepts of undervoltage load shedding for voltage stability,' IEEE Trans. Power Systems, vol. 7, no. 2, April 1992, pp. 480-488
2 C. Moors, D. Lefebvre, and T. Van Cutsem, 'Design of load shedding schemes against voltage instability,' in Proc. of 2002 IEEE PES Winter Meeting
3 D. Karlsson, Eds., Protection against voltage collapse Rep., CIGRE Tast Force 34.08, 1998
4 F. Dobraca, M. A. Pai, and P. W. Sauer, 'Relay margins as a tool for dynamical security analysis,' International Journal of Electrical Power & Energy Systems, vol. 12, no. 4, Oct. 1990, pp. 226-234   DOI   ScienceOn
5 M. Jonsson and J. E. Daalder, 'An adaptive scheme to prevent undesirable distance protection operation during voltage instability,' IEEE Trans. on Power Delivery, vol. 18, no. 4, Oct. 2003, pp. 1174-1180   DOI   ScienceOn
6 C. W. Taylor, Power System Voltage Stability, McGraw-Hill, 1994
7 P. Kundur, Power System Stability and Control, McGraw-Hill, 1994
8 H. Song, B. Lee, and V. Ajjarapu, 'Determination of control strategies against undesired protective operation with respect to voltage collapse,' Bulk power system dynamics and control - VI, Cortian d'Ampezzo, Italy, Aug. 22-27, 2004
9 D. Karlsson and X. Waymel, Eds., System protection schemes in power networks, Rep., CIGRE Task Force 38.02.19, June 2001