:: Volume 5, Issue 2 (3-2017) ::
3 2017, 5(2): 9-19 Back to browse issues page
A Reliability Block Diagram Presentation of Transmission and Super Distribution Circuit Breakers of Khorasan Regional Electric Company
Khosro Moeeni, Ali Karim Abadi *, Mohammad Ebrahim Haji Abadi Dr.
Abstract:   (341 Views)
Circuit Breakers (CBs) of transmission and Super distribution are considered to be the most important equipments of power systems. CBs should operate safely to protect power systems against faults and perform tasks such as trip and connect load. The purpose of this paper is to present reliability block diagram of transmission and Super distribution CBs and evaluation level of reliability of transmission and Super distribution substations of Khorasan Regional Electric Company (KREC). To achieve this goal, a four-step approach has been proposed. In the first step, collecting information about the failures and events occurred in the KREC has been investigated. Failures and events lead to an emergency exit and outage of CBS are studied and categorized. In the second step, has been formulated, the failure rate has led to the outage of CBs, Then the failure rate, the repair time them are calculated also. In the third step, the reliability block diagram of CB is drawn based on the failure rate calculated in the second step. Based on the failure rate calculated from the reliability block diagram and with the help of the Reliability Calculation of Power System (RCoPS) program is written under the MatLab software, indexes of reliability of the substation terminals are calculated. In the fourth step, with regard to the output energy of each terminal from the substation, the Expected Energy Not of Supplied (EENS) and unreliability cost are calculated.
Keywords: Reliability, Expected Energy Not Supplied, Unreliability cost, Breaker's failure.
Full-Text [PDF 465 kb]   (204 Downloads)    
Type of Study: Applicable | Subject: Special
Received: 2018/10/6 | Accepted: 2018/11/26 | Published: 2018/11/26


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Volume 5, Issue 2 (3-2017) Back to browse issues page