Transcript Power Monitoring And Control System (PMACS)

Power Monitoring And Control System
(PMACS)
Kevin Schneider, Chen-Ching Liu
University of Washington
Department of Electrical Engineering
Overview
Status Data and Analog Measurements
Voltage, Current, Power Limit
Checking
All Operating
Constraints
Satisfied
Operating
Constraint's)
Violated
Security Assessment
Loss of Load
Emergency Control /
Load Management
System Restoration
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Remote control capabilities
Voltage of Nodes on
Backbone > 5000V
PMACS at shore stations
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limit checking to detect
any voltage violations or
over-current problems
Emergency control
algorithm
:
DC Voltage Level
Emergency Control
10000
5000
0
1
2
3
4
Nodes on Backbone
5
Security Assessment
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To determine the voltage stability limit for the
entire system
PMACS calculates power flow
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Determines the maximal power transfer value
Available power
Security margin
PMACS security assessment software
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Determines if the system will enter an emergency state
Security Assessment
Normal Conditions
Secure
Insecure
Emergency
Restorative
Control Action
Restorative
Emergency Control Action
Contingencies
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Loss of shore station
Loss of shallow water links or deep water links
Significant load increase
Node failures
Others
Load Management
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PMACS determines if power consumption
should be limited using the acquired data
Power is to be reserved for high-priority
application
PMACS load management software
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Has load management / load shedding software
Uses information on power consumption and
agreement
Maintains a list of priority of the loads
Identifies the load devices that need to be shed
Handles high current due to overloading
Data needs for PMACS
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Breaker Status Data
o
o
o
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Breakers on the backbone
Breakers at the shore stations
Breakers on both sides of each
converter
Current and Voltage Data
o
o
MV points on the backbone
LV points on converter outputs