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Securing Critical Infrastructures, Grenoble,
October 2004
Digital Real-Time Simulation of PWM Power
Electronics Devices
Christophe GOMBERT
Authors C. Gombert, S. Bacha, D. Roye, Y.
Bésanger, R. Chareille, F. Blache
Pulse Width Modulation
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Overview
I Introduction II Average model III Hardware
interface IV Real time test of PWM control
device V Conclusion perspectives
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Power electronics in distribution networks
Power electronics devices
Applications
Power Quality (D-FACTS) Voltage dips
mitigation Reactive power control Harmonic
filtering Balancing
Power producers connection Independent Power
Producers Energy storage Intermittent production
(wind energy, solar...)
Increase performances Reduce harmonic generation
PWM Control Device
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Real-time simulation why?
Real-Time simulator
Equipment (physical device)
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Real-time simulation applications
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Real-time simulation fixed time step
? synchronize data with external equipment
Time Step (TS)
Clock
t
Tasks
Acquisition
Computation
Restitution
? (Computation Acquisition time) lt Time step
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Real-time simulation fixed time step
? Power electronics simulation
Switching events can occur between two time steps
Time Step (TS)
Diode current (Id)
Clock
t
? Detection Algorithms Clock Synchronized Status
Changing (CSSC)
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Real-time simulation fixed time step
? External signal acquisition
Clock
Time Step (TS)
Simulation input signal
t
Sampling realized each time step
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Real time simulation power electronics devices
? Case of PWM signals (fPWMgt1kHz)
? Average models
? Develop interfaces
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Application Static Var Generator (SVG)
Power Quality (D-FACTS)
Exchange reactive power with the network ?
Voltage control ? Flicker mitigation...
Voltage Source Converter (VSC)
VSC
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I Introduction II Average model III Hardware
interface IV Real time test of PWM control
device V Conclusion perspectives
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Average model of VSC
1st step classical VSC model
(PWM)
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Average model of VSC
2nd step Average VSC model
Application of sliding average window
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Average model of VSC
? Results Injected currents
Isref 200
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I Introduction II Average model III Hardware
interface IV Real time test of PWM control
device V Conclusion perspectives
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Hardware interface
Real-Time simulator
PWM control device of SVG
PWM
Hardware Interface
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Hardware interface
Hardware interface
Extract modulating signal of PWM
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Hardware interface results
Hardware interface realized with DSP (Digital
Signal Processor)
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I Introduction II Static Var Generator
(SVG) III Average model IV Hardware interface V
Real time test of PWM control device VI
Conclusion perspectives
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Real time test of PWM control device
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Real time test of PWM control device synthesis
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Real time test of PWM control device results
? Modulating signals
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Real time test of PWM control device results
? Injected current phase 1
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Real time test of PWM control device results
? DC bus voltage
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I Introduction II Average model III Hardware
interface IV Real time test of PWM control
device V Conclusion perspectives
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Conclusion perspectives
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Digital Real-Time Simulation of PWM Power
Electronics Devices
Christophe GOMBERT
Authors C. Gombert, S. Bacha, D. Roye, Y.
Bésanger, F. Blache, R. Chareille
Securing Critical Infrastructures, Grenoble,
October 2004
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Real time hybrid simulation
Power Amplifier "controled load"


"Wind"
"Wind Generator"
Torque Control
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PWM generation (sinusoïdal PWM)
Modulating signal ß1
Carrier signal
t
Comparison
TPWM
PWM Signal
t
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Control device realization
with
Linked
with
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DC bus voltage control
YoVo²
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Current control
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Real time test of average control device
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Real time test of average control device
Results
Qref-67