Overcurrent relay coordination effects on reliability indices

 

 

K. Mazlumi^I; H. Askarian Abyaneh^II

^IDepartment of Electrical Engineering, Amirkabir University of Technology, Iran kmazlumi@aut.ac.ir
^IIDepartment of Electrical Engineering, Amirkabir University of Technology, Ira askarian@aut.ac.ir

 

 

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ABSTRACT

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.

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OPSOMMING

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 koordinasiemetodes toegepas word.

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1 The author was enrolled for a PhD degree in the Department of Electrical Engineering, Amirkabir University of Technology