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7/27/2019 SMART GRID TECHNOLOGY FOR DISTRIBUTION SYSTEM RELIABILITY IMPROVEMENT
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Faculty of Engineering, Kasetsart University
Mr.Wirote BuakleeSeptember 29, 2012
SMART GRID TECHNOLOGY FOR
DISTRIBUTION SYSTEM RELIABILITY
IMPROVEMENT
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Selected Paper
[1] Zhou Xue-song,Cui Li-qiang and Ma You-jie, “Research on Smart Grid
Technology” , IEEE International Conference on Computer Applicationand System Modeling (ICCASM 2010), 2010.
[2] D. M. Staszesky, D. Craig, C. Befus, “Advance Feeder Automation isHere”, IEEE Power and Energy Magazine, September/October 2005,pp. 56-63.
[3] M. Fotuhi –Firuzabad, R. Billinton,T.S Munian and B.Vinayagam, “ANovel Approach to Determine Minimal Tie-Sets of Complex Network”,IEEE Trans. On Reliability, Vol.53, No.1, March 2004.
[4] H. Hajian-Hoseinabadi, “Impacts of Automated Control Systems onSubstation Reliability” IEEE Trans. On Power Delivery, Vol.26, No.3,
July 2011.[5] H. Hajian-Hoseinabadi, M. Hasanianfar, and M. Esmail Hamedani
Golshan, “Quantitative Reliability Assessment of Various AutomatedIndustrial Substations and Their Impacts on Distribution Reliability” IEEE Trans. On Power Delivery, Vol.27, No.3, July 2012.
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Presentation Topics
I. Definition of Smart Grid
II. Smart Grid Technology
III. Automation System
IV. Reliability Assessment of Substation Automation System
V. Impact of SAS on Substation and Distribution Reliability
VI. Future Research
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I. Definition of Smart Grid
America: to address the aging of the distributionnetwork, improve service levels, and enhance userinteraction.
Europe: to promote renewable energy use, so that thepower industry meets the efficient, flexible,environmentally friendly and conducive to market-oriented and other requirements
China: to achieve optimal allocation of grid resource andto achieve "plug and play" distributed powerapplications, and the popularity of smart meters.
“No uniform definition” about smart grid in the word. The
focus of the development of smart grid also varies.
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I. Definition of Smart Grid
Thailand(PEA): เปนโครงขายไฟฟาท ใช เทคโนโลยสารสนเทศ และส อสารมาบรหารจัดการ ควบคมการผลตส งและจายพลังงานไฟฟา สามารถรองรับการเช อมตอระบบไฟฟาจากแหลงพลังงานทางเลอกท สะอาดท กระจายอย
ทั วไป การใช รถยนตไฟฟาและระบบบรหารการใช ส นทรัพยให เกดประโยชนสงสด รวมทังใหบรการกับผเช อมตอกับโครงขายผานมเตอรอัจฉรยะไดอยางมประส ทธภาพ มความมั นคง ปลอดภัย เช อถ อได ม ค ณภาพไฟฟาได
มาตรฐานสากล
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• Advanced technologies for reliability improvement
• Ease of Control and Management
• Integrating of Distributed Energy Resources
• Supporting Demand Response
“SMART GRID” a conventional electric power systemthat has been equipped with …
I. Definition of Smart Grid
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Main Features of Smart Grid
Self-HealingOptimization
Interactive
Compatibility
Strong
Integration
Smart
Grid
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Existing Power Grid and Smart Grid
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II. Smart Grid Technology
Advanced
Metering
Infrastructure
(AMI)smart meters, wide-
area network facilities,home networking …
Smart Grid
Advanced
Distribution
Operation (ADO)...• Advanced Distribution
Automation
• Substation Automation
• Feeder Automation
Advanced AssetManagement
(AAM)equipment asset
management, defect
management,
maintenancemanagement…
..
Advanced
Transmission
Operation (ATO)Advanced grid
monitoring, wide-area
measurement systems,
state detection…
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III. Automation System
Example of Outage restoration
without and with automation
To Enhance
System Reliability
By Reducing
•number of interruption
•Service interruption time
•Area affected by the fault
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Why Automation?
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IV. Reliability Assessment of Substation Automation System (SAS)
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Reliability Evaluation Technique
• Conditional Probability Approach
• Cut-Set Method
• Tie-Set(path) Methodology
• Event Tree Method
• Fault Tree Analysis(FTA)
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Cut-Set Method
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input
input
Output
Output
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Tie-Set(Path) Method
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Output
Output
input
input
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Fault Tree Approach (FTA)
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Event Tree Approach (ETA)
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Main Control Function Main Control Action
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RBD Concept
NCCS - Network Control CenterServer
PSU - Power Supply UnitHMI - Human Machine InterfaceSTR - Star CouplerOPT - Optical ConnectionBCU - Bay Control UnitSCSS - Substation Control
System Server
Minimum Tie-Set Method
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Concept of Reliability Assessment
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Reliability Evaluation Procedure
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2. Calculate “failure rate” and “Outage time” of each loadpoint when component outage by using condition probabilitytheory and restoration time probability as follow:
Failure rate:
Outage time:
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V. Impact of SAS on Substation andDistribution Reliability
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Impact of SAS on Substation Reliability
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• Substation Automation System Architectures
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Impact of SAS on Substation Reliability
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Impact of SAS on Substation Reliability
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Impact of SAS on Substation Reliability
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•Case Studies
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Impact of SAS on Substation Reliability
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•Study Results
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Impact of SAS on Substation Reliability
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•Study Results
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Impact of SAS on Substation Reliability
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•Conclusion#1:
Applying SAS can reduce annual down time
range from 0.05% to 23.19% compare with no
automation system.
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Impact of SAS on Substation Reliability
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•Conclusion#2:
Failure rate index has not been influenced
by SAS when AST is more than 5 min.
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Impact of SAS on Distribution Reliability
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•Study Results
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Impact of SAS on Distribution Reliability
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•Study Results
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Impact of SAS on Distribution Reliability
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•Conclusion#1
Reduce MST can improve reliability indices
17.3% 17.4%
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Impact of SAS on Distribution Reliability
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•Conclusion#2
SAIFI has not been influenced by SASwhen AST is more than 5 min.
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Impact of SAS on Distribution Reliability
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•Conclusion#3
SAIFI and AENS have significantly improved
by SAS when AST is less than 5 min.
21%89%
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Impact of SAS on Distribution Reliability
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•Conclusion#4
Redundant star architecture of SAS has ahigher degree of distribution reliability
improvement
17.1%12.5%
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VI. Future Research
Apply the concept of Substation Automation System toFeeder Automation System
Apply the methodology of reliability evaluation in SAS toFAS to improve overall distribution reliability
Centralized and Decentralized Automation System for FASshould be taken into account
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