Annual Report 2011-2012

Annual Research Report 2011-2012
Project Title:
Reliability Evaluation and Anticipation in Yazd Transmission
and Sub transmission Network To Reduce Notsupplied
Energy
Department: Power System Study
Employer: Yazd Electric Regional Company
Project Staff: H.Danaie, J.Abbasi, N.Moslemi
Project Manager: D.Jalali
Project Code:PSYBY01
Project Summary:
Continuation and qualified supplying electrical energy is the main goal of electric
utilities. This goal can be accessed by Power system reliability study. This study usually
is done in two main parts, reliability evaluation and reliability anticipation. Each of
them can be done either in power system planning or in power system operation.
This project is done for reliability study in the transmission and sub transmission
network of Yazd Regional Electric Company (YREC). As said above, reliability study
in transmission and sub transmission network has two main parts as reliability
evaluation and reliability anticipation. In the first part, by gathering data for planned and
unplanned outages in transmission and sub transmission network in the period of 2007
to 2010, a database was prepared by these data for further process. In this way, many
different types of reporting for different usages can be made and at last these data yield
to the force outage rate ( ) and the repair time (r) for the different elements in power
system.
Reliability evaluation was done by extracting the reliability indices from the mentioned
database and different reports formed by it
Second part includes the reliability anticipation by the method of minimum cutset
algorithm, a powerful method for this analysis. This analysis has the following results:
• Power system energy not supplied
• Reliability indices in output nodes (loads)
• Sensitivity analysis to find the critical elements in the network which cause
to reduce the reliability indices.
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