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Adequacy equivalent development of composite generation and transmission systems using network screening
, Article IET Generation, Transmission and Distribution ; Volume 5, Issue 11 , 2011 , Pages 1141-1148 ; 17518687 (ISSN) ; Fotuhi Firuzabad, M ; Billinton, R ; Farokhzad, D ; Sharif University of Technology
Abstract
Reliability evaluation of a large composite generation and transmission system involves extensive and time-consuming calculations. Application of reliability equivalent networks therefore seems necessary in the reliability evaluation of large power systems. An approach is presented to develop an adequacy equivalent of a composite system using network screening. In the proposed method, a power system is divided into two portions designated as the study area and the external area. The goal is to find the adequacy equivalent of the external area in order to facilitate extensive reliability studies in the study area. The elements in the external area are ranked or screened based on their impacts...
Constructing the Bayesian network for components reliability importance ranking in composite power systems
, Article International Journal of Electrical Power and Energy Systems ; Volume 43, Issue 1 , 2012 , Pages 474-480 ; 01420615 (ISSN) ; Ebrahimi, A ; Fotuhi Firuzabad, M ; Sharif University of Technology
Abstract
In this paper, Bayesian Network (BN) is used for reliability assessment of composite power systems with emphasis on the importance of system components. A simple approach is presented to construct the BN associated with a given power system. The approach is based on the capability of the BN to learn from data which makes it possible to be applied to large power systems. The required training data is provided by state sampling using the Monte Carlo simulation. The constructed BN is then used to perform different probabilistic assessments such as ranking the criticality and importance of system components from reliability perspective. The BN is also used to compute the frequency and...
A heuristic-based approach for reliability importance assessment of energy producers
, Article Energy Policy ; Vol. 39, issue. 3 , 2011 , Pages 1562-1568 ; ISSN: 03014215 ; Fotuhi Firuzabad, M ; Sharif University of Technology
Abstract
Reliability of energy supply is one of the most important issues of service quality. On one hand, customers usually have different expectations for service reliability and price. On the other hand, providing different level of reliability at load points is a challenge for system operators. In order to take reasonable decisions and obviate reliability implementation difficulties, market players need to know impacts of their assets on system and load-point reliabilities. One tool to specify reliability impacts of assets is the criticality or reliability importance measure by which system components can be ranked based on their effect on reliability. Conventional methods for determination of...