300 MVAR Static VAR Compensator at Jacksonville, NC ... · PDF file300 MVAR Static VAR...
Transcript of 300 MVAR Static VAR Compensator at Jacksonville, NC ... · PDF file300 MVAR Static VAR...
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
General Testing Consideration
• 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 7
+300/-100 SVC at +100 MVARS 8
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
• 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
• 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
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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
QUESTIONS ?
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