Overcurrent relay coordination effects on reliability indices

• Published in: South African Journal of Industrial Engineering Vol. 19; no. 2; pp. 109 - 123
• Main Authors: Mazlumi, K., Abyaneh, H. Askarian
• Format: Journal Article
• Language: English; Portuguese
• Published: Bedfordview South African Institute of Industrial Engineers (SAIIE) 01.11.2008; South African Institute for Industrial Engineering; The Southern African Institute for Industrial Engineering
• Subjects: Engineering, Industrial; Failure; Load; Methods; Studies
• ISSN: 1012-277X; 2224-7890; 2224-7890

Protection system failures are the main causes of cascading outages. There is a need to evaluate reliability indices, yet the effects of relay coordination methods have not yet been investigated in the existing literature. In this paper, an algorithm based on sequential Monte Carlo simulation is proposed to find the reliability indices for different overcurrent relay coordination methods. The proposed algorithm is applied to the results of three different relay coordination methods of a sample network. Then the reliability indices for the results of three different relay coordination methods are compared, and it is shown how the reliability indices are affected by the results of relay coordination methods. Mislukkings van beveiligingstelsels is hoofsaaklik verantwoordelik vir kaskadeonderbrekings van elektriese netwerke. Derhalwe is dit noodsaaklik dat betroubaarheidsindekse geevaleer moet word teen die agtergrond dat min aandag gegee word aan relêkoördinasie. Monte-Carlo simulasie word voorgehou as oplossing van die koördinasievraagstuk. Die voorgestelde algoritme word toegepas op die afsonderlike koördinasiemetodes van 'n denkbeeldige network. Die resultate van die ondersoek toon dat die berekende betroubaarheidsindeks afhang van hoe koördinasiemetodes toegepas word.