This paper presents a review of how hardware-in-loop testing of protection relays on a real-time simulator has been put to use in a range of applications by Eskom. In some of these applications, models of relatively large parts of the transmission network have been used on a real-time simulator, either to study the performance of a relay already in service and improve its settings in response to changes in system conditions, or to test new protection settings and relay hardware prior to commissioning. In other cases, models of small-scale but representative study systems have been used to allow careful comparative evaluation of the suitability of different relay technologies for practical field conditions.
B. Rigby, A. Perera, A. Mtshali, S. Klein, A. Bartylak, Presented at South African Power Systems Protection Conference, Johannesburg, SA, November 14-16, 2012
KEYWORDS: hardware-in-the-loop testing, protection relay, real-time simulator