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CIRTEN Consorzio universitario per la ricerca tecnologica nucleare. ENEA BOLOGNA 26 th October 2011. UNIVERSITA’ DI PISA. LEADER WP4 Task 4.1 (task leader: Fabio Fineschi ) Task 4.4 (task leader: Antonio Cammi , [email protected]) - PowerPoint PPT Presentation
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Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi, Sara Bortot, Alessandro Della Bona
Fabio Fineschi, Alessio Campedrer
LEADER WP4
Task 4.1 (task leader: Fabio Fineschi)
Task 4.4 (task leader: Antonio Cammi, [email protected])
“Preliminary definition of the Control Architecture”
ENEA BOLOGNA
26th October 2011
CIRTEN Consorzio universitario per la ricerca tecnologica nucleare
UNIVERSITA’ DI PISA
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
OUTLINE
Point on the progress of the work
Reference system configuration and modeling
Significant free dynamics results
NON-LINEAR control system options
Main results
Present and future developments
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
POINT ON THE PROGRESS OF THE WORK
DYNAMICS SIMULATOR
DEVELOPMENT
NON-LINEAR
ZERO-DIMENSIONAL
NON-LINEAR
OBJECT-ORIENTED
LINEARIZED
ZERO-DIMENSIONAL
LINEARIZED
OBJECT-ORIENTED
TRANSIENT ANALYSES
LINEAR ANALYSIS
NEW!
CONTROL SYSTEM
DEVELOPMENT
• Evaluation of scenarios
• Final proposal• Implementation
TOOLS GOALS
CONTROLLED
PLANT TRANSIENT BEHAVIOR
NEW!
NEW!NEW!
NEW!
NEW!
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
POINT ON THE PROGRESS OF THE WORK
CAUSAL APPROACH ACAUSAL APPROACH
INPUT AND OUTPUT VARIABLES DETERMINED A PRIORI
NO INPUT AND OUTPUT VARIABLES NEITHER BOUNDARY CONDITIONS DETERMINED A PRIORI
EQUATIONS TO BE REWRITTEN FOR THE STATE-SPACE REPRESENTATION
CAUSALITY SPECIFIED ONLY WHEN SOLVING THE EQUATIONS
PROBLEM SOLVED STEP BY STEP BY THE USER COMPONENT MODELS INDEPENDENT OF OTHER MODELS AND BOUNDARY CONDITIONS
GREATER EFFORT REQUIRED FOR MODIFYING EXISTING MODELS
MORE REALISTIC DESCRIPTION OF COMPONENTS
DIFFICULTIES IN REUSING MODELS POSSIBILITY OF EASILY REUSING COMPONENT AND SUBSYSTEM MODELS
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
REFERENCE SYSTEM CONFIGURATION and MODELING
165 cm
529.89 cm
MAIN COMPONENTS: CORE
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
MAIN COMPONENTS: CORE
REACTIVITY COEFFICIENTS- Doppler from SCK calculations- Lead density from SCK calculations- Axial expansion from DEMO (missing data)- Radial expansion from DEMO (missing data)
KINETIC PARAMETERS- λi from DEMO (missing data)
- βi from DEMO (missing data)
CONTROL RODS WORTH- Insertion curves from DEMO (missing data)
REFERENCE SYSTEM CONFIGURATION and MODELING
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
REFERENCE SYSTEM CONFIGURATION
MAIN COMPONENTS: SG
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
PRIMARY LOOP
REFERENCE SYSTEM CONFIGURATION and MODELING
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
SECONDARY LOOP (BoP)
REFERENCE SYSTEM CONFIGURATION and MODELING
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
SECONDARY LOOP (BoP)
FINAL REFERENCE CONFIGURATION MISSING
STANDARD COMPONENTS EMPLOYED
REFERENCE SYSTEM CONFIGURATION and MODELING
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
SIGNIFICANT FREE DYNAMICS RESULTS
LEAD MASS FLOW RATE VARIATIONVARIATION = - 20 %
PowerT_cold_leg
T_hot_leg Pressure
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
SIGNIFICANT FREE DYNAMICS RESULTS
TURBINE ADMISSION VALVE COEFFICIENT VARIATIONVARIATION = - 10 %
Power
T_cold_leg
T_hot_leg Pressure
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
NON LINEAR CONTROL SYSTEM OPTIONS
VARIABLE LEAD MASS FLOW RATER1 =
E1 =
Output Efficienza
T_Steam 0.7904
T_fuel 0.5615
Pressione 0.9984
G_Steam 0.9993
T_cold_leg 0.9075
Power 0.8369
T_hot_leg 0.7353
RGAR1 =
T_S_in G_water h_rod G_Pb kv_turbine
T_Steam 0.4169 0.0082 0.1729 0.0274 -0.0006
T_fuel 0.0478 0.0003 0.2683 -0.0008 -0.0002
Pressione 0.0000 -0.0021 -0.0000 -0.0000 0.9989
G_Steam -0.0000 0.9986 -0.0000 -0.0000 -0.0000
T_cold_leg 0.1597 -0.0019 0.0741 0.5911 0.0007
Power 0.2757 -0.0007 0.4267 -0.0018 0.0004
T_hot_leg 0.1000 -0.0024 0.0581 0.3841 0.0009
E1 =
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
NON LINEAR CONTROL SYSTEM OPTIONS
FIXED LEAD MASS FLOW RATE
T_S_in G_water h_rod kv_turbine T_Steam 0.3966 0.0080 0.2098 -0.0007
Pressione 0.0000 -0.0021 0.0000 0.9987
G_Steam -0.0000 0.9987 0.0000 -0.0000
T_cold_leg 0.1623 -0.0027 0.0586 0.0012
Power 0.3529 -0.0002 0.6407 0.0000
T_hot_leg 0.0881 -0.0018 0.0908 0.0008
E2 =
RGA
E2 =
Output Efficienza T_Steam 0.7834
Pressione 0.9983
G_Steam 0.9993
T_cold_leg 0.4685
Power 0.9968
T_hot_leg 0.4218
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
NON LINEAR CONTROL SYSTEM OPTIONS
VARIABLE vs. FIXED LEAD MASS FLOW RATE
PROS & CONS
ADVANTAGES
- Better power control- Steady-state reached in a shorter time
DISADVANTAGES
- More difficulties in pairing process- Larger oscillations of controlled variables- Cold leg temperature to be controlled by feedwater temperature
strict UPPER and LOWER constraints
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
NON LINEAR CONTROL SYSTEM OPTIONS
FIXED LEAD MASS FLOW RATE
Feedforward-Feedback
PID Input OutputInput
Controllo
T_Pb_cold_leg
Power
Pressione
T_S_in
G_water
h_rod
kv _turbine
ALFRED
T_S_in
G_water
h_Rod
kv _turbine
T_Steam
Pressione
G_Steam
T_cold_leg
Power
T_hot_leg
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
kv_turbine
4
h_rod
3
G_water
2
T_S_in
1
Taratura
Power G_water
T_Pb_cold _leg _0
Pressione _0
Power _0
PI_5
PID
PI_3
PID
PID Anti -Windup
e usat
Add8
Add4
Add1
Pressione
3
Power
2
T_Pb_cold _leg
1
NON LINEAR CONTROL SYSTEM OPTIONS
FIXED LEAD MASS FLOW RATE
Feedforward-Feedback
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
MAIN RESULTS
POWER LEVEL REDUCTION: - 10%
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
MAIN RESULTS
POWER LEVEL REDUCTION: - 10%
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
MAIN RESULTS
POWER LEVEL REDUCTION: - 10%
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
MAIN RESULTSFIXED LEAD MASS FLOW RATE
Feedforward-Feedback
POWER LEVEL REDUCTION: - 200 MW
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
MAIN RESULTS
POWER LEVEL REDUCTION: - 200 MW
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
MAIN RESULTS
POWER LEVEL REDUCTION: - 200 MW
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
MAIN RESULTS
POWER LEVEL TRANSIENT: + 20 MW starting from f = 60%
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
MAIN RESULTS
POWER LEVEL TRANSIENT: + 20 MW starting from f = 60%
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
MAIN RESULTS
POWER LEVEL TRANSIENT: + 20 MW starting from f = 60%
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
PRESENT AND FUTURE DEVELOPMENTS
TIT CONTROL RGA
R3 =
T_S_in G_water h_rod G_att kv_turbine
T_Steam 2.0160 -2.0320 0.0297 0.9871 -0.0020
Pressione -0.0000 0.5476 0.0000 -0.5439 0.9963
G_Steam -0.0000 1.2836 0.0000 -0.2837 -0.0000
Power 0.2968 0.0366 0.6318 0.0271 0.0004
T_hot_leg -0.5613 0.4968 0.1950 0.3432 0.0030
T_cold_leg -0.7515 0.6674 0.1434 0.4703 0.0024
E3 =
Output Efficienza T_Steam 0.9994
Pressione 1.0000
G_Steam 0.9999
Power 0.9963
T_hot_leg 0.6904
T_cold_leg 0.7294
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
PRESENT AND FUTURE DEVELOPMENTS
OPEN ISSUES
Update with final core configuration DATA NEEDED!
Closing the secondary loop DATA NEEDED!
- ELSY BoP data employed provisionally
- Data concerning bleeds, heaters, …
- Detailed and complete configuration
Development of ADVANCED CONTROL:
- Variable Structure Control (VSC)
- Predictive control
Antonio Cammi, Roberto Ponciroli, Stefano Lorenzi , Sara Bortot
D14 : Normal, Transient and Accidental Operational Modes: Control and Protection Functions Identification
3rd Draft Issued
D21: Preliminary Definition of the Control Architecture
1st Draft – Chapter I issued
DOCUMENT RELEASE