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300 MVAR Static VAR Compensator
at Jacksonville, NC
Testing and Commissioning Experiences
Paper # 14TD0242 By:
John O’Connor
Gregory F. Reed
Dan Sullivan
Nobuki Shimokaji
Joseph Birsa
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+300/-100 SVC CONFIGURATION
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SVC CONTROL BLOCK DIAGRAM
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General Testing Consideration
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Location on weak part of system
High Delta-V/Delta Q
Testing during light system load conditions
System Operator (and Plant Operator)
“comfort level”
• Both the manufacturer and utility would like
to test as much of the range of the SVC as is
possible
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PERFORMANCE TESTING GOALS
• Initial Energization
• Component Integrity Checks
– Control logic
– Cooling system
– Thyristor switching and blocking
– Full load testing for individual components
– Thermography
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PERFORMANCE TESTING GOALS
• Testing individual components
– Thyristor Controlled Reactor
– Harmonic Filter Capacitors
– Thyristor Switched Capacitors
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+300/-100 SVC at -100 MVARS
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+300/-100 SVC at +100 MVARS
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PERFORMANCE TESTING GOALS
• Response rate testing of overall SVC
• PSSE (or PSLF) simulations to determine
expected grid and plant response
– Static power flow simulations sufficient to
predict testing results (dynamic simulations not
necessary)
• Knowing the Thevenin Equivalent Impedance
(available short circuit current) is helpful
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TRANSMISSION SYSTEM
• Equipment over voltage considerations
– SVC side: step up transformer over-voltage rating
is much higher than a typical T/D transformer
– Grid side: stay below 1.05 per unit and most
transmission equipment voltage limits are not an
issue
• Transmission circuit breaker interrupting
capability voltage ratings
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DISTRIBUTION SYSTEM
• Distribution voltage limits
– Utility limit of 126 volts (on a 120 volt basis)
• Distribution voltage regulator margin
• Distribution capacitor bank status/operation
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GENERATING PLANTS
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Generator voltage limits
Generator minimum MVAR limits
Generator MVAR changes during testing
Plant Operator understanding
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SYSTEM OPERATORS
• System Operator understanding
• System Operator in control of testing
– Include time for Operators to “play” with the SVC
• Contingency plans for testing problems or
unforeseen occurrences
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COORDINATION OF TESTING
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Utility Transmission System Operator
Utility Maintenance Technicians
Utility Field Support Engineer
Utility Transmission Planning Engineer
Supplier Field Test Engineers
Utility Distribution System Operator
Utility Generating Plant Operators
Thyristor Stack (One Phase)
Thyristor Stack Installed
Thyristor Switched Capacitor (TSC)
Thyristor Switched Capacitor (TSC)
Thyristor Controlled Reactor (TCR)
Filter Capacitor
Transformers (3 single phase + spare)
SVC Control Panels in Bldg
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QUESTIONS ?