Adequacy assessment of time-delayed reclosing scheme for transmission system
Adequacy assessment of time-delayed reclosing scheme for transmission system
- Author(s): G.-H. Gwon ; Yun-Sik Oh ; Chul-Hwan Kim ; R.K. Aggarwal
- DOI: 10.1049/cp.2014.0125
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- Author(s): G.-H. Gwon ; Yun-Sik Oh ; Chul-Hwan Kim ; R.K. Aggarwal Source: 12th IET International Conference on Developments in Power System Protection (DPSP 2014), 2014 page ()
- Conference: 12th IET International Conference on Developments in Power System Protection (DPSP 2014)
- DOI: 10.1049/cp.2014.0125
- ISBN: 978-1-84919-834-9
- Location: Copenhagen, Denmark
- Conference date: 31 March-3 April 2014
- Format: PDF
In transmission system, the reclosing method is quite effective to restore the system after removing line faults by tripping circuit breakers. This is because the most of faults on overhead transmission system are transient in nature. Especially, high-speed reclosing scheme has a benefit increasing the continuity of supply due to fast restoration of system. It is possible to increase the transient stability due to high-speed reclosing, whereas it damages generator shafts due to fast closing. As one of alternatives, time-delayed reclosing can be proposed for transmission system. Time-delayed reclosing is a method having longer dead time than that of high-speed reclosing. However, if the system separation happens with high angle during long time, time-delayed reclosing may result in aggravation of stability. Thus, transient stability assessment must be considered for application of time-delayed reclosing. This paper models a 154kV and 345kV transmission systems using ElectroMagnetic Transient Program-Restructured Version (EMTP-RV) and performs transient stability assessment using Integral Square Error (ISE) developed by Dynamic Link Library (DLL) to assess the adequacy of time-delayed reclosing for modelled transmission system.
Inspec keywords: EMTP; power overhead lines; power transmission faults; power system transient stability; circuit breakers
Subjects: Power system control; Switchgear; Power transmission, distribution and supply; Overhead power lines
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