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GRID
Wide Area Visualization & SynchroPhasors
January 12, 2012 Manu Parashar
Anil Jampala
Principal Engineer
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Holistic Generalized Grid Security Analysis
» Control Center -PDC
PMU MEASUREMENT-BASED
Analysis
(PhasorPoint)
Traditional MODEL-BASED
Analysis
(EMS)
SCADA & Alarms WAMS
State Estimator
State Measurement
Other EMS Applications
New Applications
Small Signal Stability
Oscillation Monitoring
Transient & Voltage Stability
Stability Monitoring & Control
Island
Management
Island Detection,
Resynchronization,
& Blackstart
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An Integrated “measurement-based” and “model-based” Approach.
PMU measurement-based methods Identify problems quickly.
PREDICT & MITIGATE
EDGE
MONITOR
OPERATING POINT
Model-based techniques provide the corrective actions (i.e. ‘what-if’ analysis) .
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Wide Area Visualisation
RTUs
Our Integrated SynchroPhasor Solutions
PhasorPoint Workbench
Synchrophasor Framework
PMU & RTU Aggregation Applications
e-terrabrowser
e-terravision
PMUs
Energy Management System Dynamic Security
Assessment
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- Serve as a Data Information Hub to consolidate information -Correlation between “measurement-based” & “model-based” techniques. -Complex event processing using WAMS, SCADA & EMS info. -Central repository for visualization layer (i.e. e-terravision) and alarming Configuration
DSA Results
HOLISTIC GENERALIZED GRID SECURITY FRAMEWORK
Generalized Security Assessment (GSA)
Wide Area Security
Situation Awareness Wide Area Visualization (e-terravision)
Steady State
Security
Dynamic Security
UI Navigation UI
Navigation
Wide Area Monitoring Systems
(WAMS)
EMS Real Time Network Analysis
(SE/CA)
Small signal
Voltage
Transient
PMU-based Apps
(PhasorPoint) Network Model-based Apps
(EMS/Powertech Tools)
Condition
Monitoring
Non-operational
Data
Condition monitoring
Weather information
Power System Grid
Copyright ALSTOM Grid
Network WAMS Alerts PMU/SCADA
Web Services CIM TBD TBD
Situational Awareness
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Generalized Grid Security Framework - Integrated Context
State Estimator
CTG Analysis
Transient Stability
PMU/PDC RT
MEAS
WECC - September, 2010
Voltage Stability
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System Contingencies – Impacted Assets, Location, Severity, Cause
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Schematic Display – Still Preferred for Power Flow Monitoring
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Small Signal Oscillation Visualization within e-terravision Modes shapes, amplitudes, damping, frequency, etc
Real-time alerts on poorly damped oscillations
Identify regions where inter-area oscillations are observable
Track oscillatory stability in real-time.
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Voltage Stability Assessment in e-terravision Voltage Contours, MW Margins, Weak Elements, Remedial Actions
»Identify weak elements (i.e. regions most prone »to voltage instability)
»MW Transfer Margins
»Control »Recommendations
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Reactive Reserves – Low/High System Voltages, where are the Vars ?
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PMU Visualization within e-terravision
Monitor ‘Angle Separation’ between source & sink
Phase angular spread across power system
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Weather Overlays
Radar Images and Lightning Strikes within close proximity of assets
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Small Signal Oscillation Information within EMS Displays (e-terrabrowser)
Mode Shape Information
Oscillatory Modes
Mode Summary
Integrated alarms in EMS tabular displays (e-terrabrowser) - New alarm categories in ‘Alarm Summary’ (Disturbance, Low-Frequency Oscillations) - Tabular showing current/historical oscillatory mode information.
ALSTOM SynchroPhasor Solutions
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PhasorPoint A SynchroPhasor Applications Framework
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PhasorPoint SynchroPhasor Applications Framework
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Scalable from Pilot to Large Scale
Small Pilot Systems Large Enterprise-Class Systems
Supports 5000+ phasors @ 60Hz
Enterprise-class reliability, security, inter-operability
HIGH AVAILABILITY (HA) Automated data recovery between redundant Servers
Proxy servers
Historical (lost) data recovery supported throughout Psymetrix PDC range (Substation, Regional, Central PDC)
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C37.118 PMU/PDC
Open Interfaces
Data Recovery
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Flexible “User-Defined” Functionality
Composite Alarms
− Synchronised data synchronized alarms − Logical combinations wide-area alarms − Flexible logic combine alarms to notify significant threats − Applicable to voltage stability alarms
Event Logic
Regional Voltage Stability
IF (ANY Sustained voltage slide OR N low voltage
detections)
AND ANY High Q flow
Scalar Calculations
User -created calculations derived values
Embedded flexible scripting language to extend functionality.
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Overview Display
System level map
System Overview Map shows if there is any warning anywhere in the system Status Overview identifies
which phenomena have produced alarms
Event History Viewer shows a 15-minute time history of the
occurrence of each type of alert
PhasorPoint main tabs
The border of all measurement and group icons represents recent
alarm history (15 minutes)
Measurement group
Angle difference
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Voltage and Phase Angle Monitoring
The colour of Voltage Phasor indicator show alarm status for High or Low voltage conditions
Voltage Phase and Magnitude Arrow
Blue indicator when transient occurs....
The blue vertical lines indicate the Times of transients on the chart
Tiered Hierarchy
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Oscillatory Stability Management
1/F MODE FREQUENCY
MODE AMPLITUDE
A
MODE DECAY TIME
EXP(-t/ ? )
MODE PHASE
Mode Frequency
Mode Amplitude
Mode decay time
Mode Phase
Exp(-t/τ)
Measured P / f / δ
Simultaneous multi-oscillation detection and characterisation direct from measurements
For each oscillation detected, alarm on:
mode damping and/or
mode amplitude for
Operations
Planning & Analysis, Plant Performance
Unlimited oscillation frequency sub-bands
Individual alarm profiles for each sub-band
Post-event analysis
Dynamic model validation
Damping controller performance assessment
Dynamic performance baselining
Early warning of poor damping (two level alarms)
Fast Modal Analysis: Alarms
Trend Modal Analysis: Analysis
Wide area mode alarms Mode locus plot with alarm thresholds
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Example: Modes Observed in Colombia
Ecuador Mode 0.49Hz
Governor Mode 0.06Hz
Inter-area mode at 0.49Hz (Colombia-Ecuador). Opposing
phase in South
Common-mode: whole system oscillates in coherent
phase
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GRID
www.alstom.com
THANK YOU
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Islanding, Resynchronisation & Blackstart
Frequency deviation indicated by
colour
Voltage angles rotate
freely if islanded
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MODEL-BASED APPLICATIONS MEASUREMENT-BASED APPLICATIONS
PMU Information
Alerts/Alarms
Integrated “measurement-based” and “model-based” Solution
Downsampled PMU Data
(1 per second)
Oscillatory Stability
Management
Composite Event Alarms
Islanding Resync, & Blackstart
Line Parameter Estimation
Phasor Historian
SynchroPhasor Platform
Voltage Stability Assessment
Powertech Tools
SE Snapshot
Unified Wide-Area Visualization e-terravision
PMUs PMUs
PMUs Damping
control
DSA Results (few min)
High Speed PMU Data (30-60 per second)
VISUALIZATION
DATA MANAGEMENT & APPLICATIONS
DATA ACQUISITION & CONTROL
Control Center openPDC
Enhanced State
Estimator
Contingency Analysis
EMS e-terraplatform
DTS Alarm Management