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7/24/2019 Electrical Distribution Automation
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Copyright © CenterPoint and SEL 2015
Distribution Automation Case Study:
Rapid au!t Dete"tion# $so!ation# andPo%er Restoration &or a Re!iab!e
'nderground Distribution System
David Gomes and Richard ColungaCenterPoint Energy
Payal Gupta and Ashok BalasubramanianSchweitzer Engineering Laboratories, Inc.
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• 11,!!"acre master"plannedcommunity in #$ %ouston
suburb o& Cypress, '(• )*pected to serve +1,!!!
single"&amily homes and-,!!! residents
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R
RPresently at .!/ o&
pro0ected groth
• 1 &eeder loop 2.3- k45• + radial circuits• + reclosers• ++ pad"mounted sitches
• &ault interrupters• 617 miles o& primary
underground &eeder cable
Pro0ected8
9 to 11 distribution circuits
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R
R
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(hree)Phase (%o)Line and (%o)Load
Pad)*ounted S%it"h Contents
• + line"side sitches 2motor operable5
• 1 dual"&eeder protection relay
• + load"side &ault interrupters
• + interrupter controllers
• An :;, sitch chamber ith
pressure sensor
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Pad)*ounted S%it"h Ser+es System
• 13- <4Athree"phase
industrial load
• 6.! single"phase=RD loops
• 6-! single"phase
pad"mounted =RDtrans&ormers
>ine":ide
:itch 1
>ine":ide
:itch +
>oad":ide
?nterrupter +
>oad":ide
?nterrupter 1
Circuit ?n Circuit @ut
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Con+entiona! au!t Lo"ationDete"tion *ethods ,ithout
Distribution Automation
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(raditiona! au!t Lo"ation Pro"ess
• Dispatch sends overhead operations creto the &ield
• @verhead operations cre determines that
&ault is on primary and tells dispatch to callunderground operations
• =nderground operations cre is deployed
♦ 4isually inspects sitches and manholes
♦ @pens line"side sitches
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Re)Energi.e toind au!t
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$so!ate au!tedSe"tion
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Restore Po%er to
/on&au!tedSe"tions
C!ose
C!ose
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Pinpoint the Ea"t au!t Lo"ation
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Repair or Rep!a"e au!ted Euipment
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Con+entiona! au!t Lo"ation
$s $ne&&i"ient
• 4ery time consuming
• >abor intensive
• Costly
• Detrimental to euipment
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$mp!ementing an 'nderground
Distribution Automation System
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(he 'DAS -be"ti+e$mpro+e Distribution System Re!iabi!ity
• Reduce outage &reuency
• Reduce outage duration
• <inimie number o& a&&ected customers• Reduce costs associated ith outage
management
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(he 'DAS -be"ti+e$n"rease System -perationa! E&&i"ien"y
• Automatic &ault detection and &aulted
one isolation
• Rapid netork recon&iguration &or
distribution system to sel&"heal
• Automatic source trans&er
• Remote monitoring and control
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(he 'DAS ComponentsProte"ti+e Re!ays
• Per&orm protection and &ault recording
• Provide inter&ace to control sitches
and reclosers
• Provide =DA: ith data 2analog, binary,
and counters5
• Provide =DA: ith status o& sitches andreclosers 2-+A and -+B5
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(he 'DAS ComponentsAutomation Contro!!ers
• ?)C 11.1"."compliant
logic engine 2DA logic5
• Data concentration and
control signal issuance
• Protocol conversion
• :@) recording
and vieing
• Remote engineering
access
• ?ntegrated security and
data access control
• )vent alerts via email
and voice annunciation
through telephone
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(he 'DAS ComponentsComputer
• Runs %<? and :CADA system
• Runs oscillographic event reports
collection so&tare
• Provides summary database &or stored
event data
• :ends email ith event summary andattached oscillographic event data report
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(he 'DAS ComponentsSate!!ite)Syn"hroni.ed C!o"3
• ?s high"accuracy time source 21!! ns5
• Provides ?R?G B signal to =DA:, hich‑
distributes time signal to ?)Ds via :#'P
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Automating a S%it"h
• -+A and -+B sitchcontacts
• >ine"side C's
• :;, pressure sitch
• <otor"operated
sitches
• ;iber netork
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Distribution System $n&ormation !o%
Reclosers and
>ine":ide :itches
>oad":ide ;ault
?nterrupters
Recloser Controls
and Dual";eederProtection Relays
;ault ?nterrupter
Controller
Automation Controller 1 Automation Controller +
:atellite":ynchronied Clock Computer
2%<? and )vent Collection5
)vent
<essenger
'elephone
:<'P
:erver
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Automati" Re"on&iguration Seuen"eDA )nabled
#e )vent
Detected
=pdate
Complete
Permanent
;ault Con&irmed
;aulted :ection
?solated
?dle
=pdate
Analye
?solate
Restore
)vent
Cleared
Recon&iguration
Complete
#e )vent
#e )vent
#e )vent
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'DAS Automati" Sour"e
(rans&er S"heme
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Abnorma! System Conditions
$nhibit 'DAS
• ?)D in local mode
• Device diagnostic &ailure
• Communications &ailure• Reported command &ailure
• %old tag present on ?)D
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'DAS uture Epansion
• ;le*ibility automatic detection andaccommodation o& changes made to
system topology
• :calability easy modi&ication o& netorktopology ith drag"and"drop &eature
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uestions6
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