Oncor Electric Delivery Intelligent Grid at Oncor Electric Delivery SWEDE Conference Alan Bern – SCADA / Automation Manager May 1, 2008
Oncor Electric Delivery
Intelligent Grid atOncor Electric Delivery
SWEDE Conference
Alan Bern – SCADA / Automation Manager
May 1, 2008
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Smart Grid Is Not Just …
Advanced Meter Reading (AMR) or Advanced Meter Infrastructure (AMi)
Distribution Automation
Substation Automation
Advanced Distribution Applications
Fault Identification and Location
Volt – VAR Control
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Smart Grid Is …
Distribution AutomationIntelligent SwitchingCapacitor Control
Advanced MeteringRemote Sensing
ApplicationsDMS/OMS/SCADAMWM/EMS/MDMS
CommunicationsSatellite, RF, Fiber, Cellular, BPLPLC, Pager, Microwave
FiberSubstationMonitoringSCADAControl
System MonitoringVoltage / CurrentOutageFault Indication
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Wireless Information Backhaul
Station
RouterRouter
Station
Station
Broadband Insertion
Point
Broadband Insertion
Point
Extender
GatewayGateway
Collector
Extender
Collector
Extender
Collector
Extender
Collector
Switching Station
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CURRENT Smart Grid ServicesNetwork Architecture
Low Voltage <10 Mbps
Medium Voltage < 20 Mbps
Fiber or Wireless Backhaul1 Gbps (fiber), 1-3 Mbps (wireless)
MANDWDM Multi Gbps
Carrier POP
Utility Substation(Operational & Non-
operational Data)
Metro Area Fiber Network
Managed In Home Network
Private IntranetUtility Partner
Real time control & verification
All meter data
Distribution Point
Current and voltage sensing at the transformer
CT Coupler & CT Bridge®
Current NodeCT Coupler &
CT Backhaul-Point
CT Coupler® & CT OTP™
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BPL Transformer Monitoring
E-Mail Notification
Report
Details
What happened
here?
1 2
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Secondary Neutral Failure
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TRANSFORMER MONITORING SUMMARY
Voltage Monitoring Field Investigation Cause Summary
BO Xformer25%
Capacitor2%
BO XformerLead/Connection
10%
Secondary Brkr Tripped30%
BO Arrestor1%
BO Secondary2%OL Secondary/Xformer
9%
Trees8%
Xformer Tap1%
BO Secondary NeutralConnection
6%Sub LV Bus Voltage
6%
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AMS Systems
CURRENTNOC
Direct Load Control
ServiceTo Home
Electric Meter, (Svc Disconnect)
Commercial Meter
DistributionSubstation
PowerLines
PLC - Substation Communication
Equipment
BPL Fiber
BPL Backhaul Point BPL Bridge @ Trans
Oncor PLC Server
OncorMDMS
PLC – Two Way Automatic Communication System (TWACS) by DCSI
BPL – CURRENTBilling
BPL Data Flow
PLC Data Flow
Note: Illustrative, both technologies will not normally be installed on the same substation
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Transmission Grid Management
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Substation Automation
Before
After
•Relay Replacement Program
•Integrated Digital Fault Recorder
•Equipment Monitoring
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Distribution Automation – Smart Switches
Manual OperationSCADA OperationUnder frequency EventOver Voltage EventUnder Voltage EventReclose SchemeCurrent Analog Values
Substation RTU
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Distribution Capacitor Automation
• VAR Management
Master controlled system – monitors feeder VAR flow at substation
Allows tighter control over feeder power factor (reduces losses)
Allows better utility response to customer installed capacitors
Primarily uses 1-way paging (some 2-way
w/cell modems)
3,410 automated controls installed
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Power Factor Comparison
2005/2006 Power Factor Comparison for Balch Springs 1905
82.00%
84.00%
86.00%
88.00%
90.00%
92.00%
94.00%
96.00%
98.00%
100.00%
102.00%
Time (8/21 - 8/23)
Po
wer
Fac
tor
2005 Power Factor 2006 Power Factor
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DMS Functionality
OverloadsFault LocationRemote Control SwitchesAutomated fault isolationVolt / VAR ControlLoad Flow Modeling
Note: With field values
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Create AMR Ping List Command Drop Down
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All of this and MORE is Smart Grid at Oncor …