integrating synchrophasors and oscillography for wide-area...
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Copyright © Hawaiian Electric Company, HELCO, and SEL 2016
Integrating Synchrophasors and Oscillography for Wide-Area
Power System AnalysisDora Nakafuji
Hawaiian Electric Company
Laura Rogers Hawaii Electric Light Company
Jared Bestebreur, Michael Rourke, and Greg ZweigleSchweitzer Engineering Laboratories, Inc.
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Hawaii Electric Light Company (HELCO)
Map data ©2016 Google
50% Renewable Power Regularly Integrated
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Challenges With Islanded SystemsSignificant Voltage, Frequency, and Power Swings
PMU Frequency
59.647 Hz
60.014 Hz
60.564 Hz
12:40:00 AM 12:53:20 AM 1:10:00 AM
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Renewables Introduce Faster Dynamics
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SCADA Misses Information
91.90 kW
62.31 kW
32.72 kW
4:27:00 PM 4:27:20 PM 4:27:40 PM
PMU Real PowerSCADA Real Power
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• Post-fault event report is saved to IED’s nonvolatile memory
• Voltage and current measurements are sent to SCADA from IED or remote terminal unit (RTU) every few seconds
Traditional Monitoring and Analysis
IED
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What Is an Event Report?
Prefault Data Post-Fault Data
• Currents• Voltages• Digitals
Fault DataIED
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Report Analysis Before Software Tools
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What Is a Synchrophasor?
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Architecture for Data Synchronization
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Correlation of Time-Stamped Data Types
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• Remote download via communications processor• Local download at substation
Traditional Event Report Collection Systems
Clock
IRIG-BSCADA
Engineering
Communications Processor
Protective Relays
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Defense-in-Depth Security Approach
Substation Perimeter
Serial Encryption, User Access Proxy
Switch
WAN
Zone 0
Zone 1
Zone 2
Zone 3
Protective Relays
Communications Processor or PDC
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Local Collection for Simplicity
Protective Relays
Managed Ethernet Switch
Protective Relays
Report Collection
Communications Processor
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Wide-Area Collection for High-Speed Networks
Substation IED Network
Substation IED Network
Substation IED Network
WAN
Report Collection
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Hybrid Collection for Performance and Security
Protective Relays
Protective Relays
Report Collection
WAN
Communications Processor Communications Processor
Substation Substation
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Architecture for Streaming Synchrophasors
Substation PMU/PDC Network
Substation PMU/PDC Network
Substation PMU/PDC Network
Web Client
WAN
Central PDC Synchrophasor Archive
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Collection Architecture Implemented at HELCO
Control Center
Substation
Event Report DataSynchrophasor Data
WAN
Central PDC Synchrophasor Archive
Event Report Collection and Archive
Protective Relays
Switch
PDC
Communications Processor
Web Client
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HELCO Lightning StrikePMU Frequency
59.647 Hz
60.014 Hz
60.564 Hz
12:40:00 AM 12:53:20 AM 1:10:00 AM
IED 1
IED 2
IED 3
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59.647 Hz
60.014 Hz
60.564 Hz
12:40:00 AM 12:53:20 AM 1:10:00 AM
IED 1
IED 2
IED 3
Synchrophasors
IED Event Reports
Data Correlation for Added Context
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59.647 Hz
60.014 Hz
60.564 Hz
12:40:00 AM 12:53:20 AM 1:10:00 AM
IED 1
IED 2
IED 3
Event Summary Data for Operations
IED Event Report Summary
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Event Reports for Detailed Analysis
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• Faster analysis of system events• Better understanding of renewable impact on system
during disturbances• Situational awareness for operations
HELCO Benefits
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Questions?