Introduction to Multiphysics Simulations for Power Systems

Jasmin Smajic1, Christian Franck2, February 20, 2014
Introduction to Multiphysics Simulations
for Power Systems
1
Institute of Energy Technology (IET)
HSR - University of Applied Sciences of Eastern Switzerland
Oberseestrasse 10, Rapperswil, Switzerland
[email protected]
2 Swiss
Federal Institute of Technology (ETH)
High Voltage Laboratory
Physikstrasse 3, CH-8092 Zürich, Switzerland
[email protected]
Initial Information

Detailed plan of lectures and exercises

Documents repository:
http://homepage.hispeed.ch/Jasmin/multiphysics_simulations.htm
Contents


Introduction to field simulations

Mathematical model

Model discretization

Numerical solution
Real life simulation examples

Coupled transient electro-mechanical analysis of generator circuit
breakers

Coupled transient electromagnetic-thermal analysis of generator
circuit breakers

Coupled electromagnetic-thermal analysis of power transformers
Introduction to Field Simulations
Mathematical Model
Source
Mathematical model
Model parameters
Partial Differential Equation (PDE):
 

Df (=
x ) 0, x ∈ Ω
Boundary Conditions (BC):
 

Bf (=
x ) 0, x ∈ ∂Ω
Material: ( µ , σ , ε )
Frequency: ( f )
  
Sources: ( Es , H s , J s )
Introduction to Field Simulations
Model Discretization
Model discretization
PDE &
Boundary Condition
 

Df ( x ) = 0, x ∈ Ω
 

Bf ( x ) = 0, x ∈ ∂Ω
Large sparse linear
system of equations
FEM scheme
[A]{x} = {b}
Introduction to Field Simulations
Numerical Solution
Electric and magnetic field, potential…
Colorful pictures as a final
result of field simulation
Electromagnetic energy, force …
Temperature, pressure, velocity…
Real Life Simulation Examples
Coupled Transient Electro-Mechanical Analysis of GCB
Power transmission lines
Step-up
transformer
> 110kV
GCB
< 30kV
Generator
In the area of generator circuit breakers (GCB) is the ABB development and manufacturing
unit in Oerlikon (ABB High Current Systems) the technology- und market leader:
•
Global market size ~ 180 MUS$ (~ 450 GCBs)
•
ABB market share ~ 75%, 140 MUS$ (~ 340 GCBs)
Real Life Simulation Examples
Coupled Transient Electro-Mechanical Analysis of GCB
EM-Part
Non-harmonic short-circuit current with significant
exponentially decaying DC-component:
Stationary 3-D Magnetostatic Analysis
Software: ANSYS Emag
Magnetic Force Density
300
R
S
T
ME-Part
Transient Mechanical Analysis
(in Time-domain)
Kurzschlussstrom (kA)
200
100
0
-100
-200
Software: ANSYS Structural
-300
0
IEFF=100 (kA)
20
40
Zeit (ms)
60
80
Real Life Simulation Examples
Coupled Transient Electro-Mechanical Analysis of GCB
ABB GCB:
HECS-130R
Nominal voltage:
25.3kV
1120mm
1885mm
Rated current:
9kA
Rated short-circuit current:
130kA
Reaction time:
60ms
2700mm
Mass:
3’500kg
Real Life Simulation Examples
Coupled Transient Electro-Mechanical Analysis of GCB
Animation of the breaker’s displacement
during the entire short circuit time of 80ms
Real Life Simulation Examples
Coupled Electromagnetic-Thermal Analysis of GCB
EM-Part
Stationary 3-D Eddy-currents
Analysis (in Frequency-domain)
Software: Infolytica MagNet
Ohmic and Eddy-current
Losses
TH-Part
Transient Thermal Analysis
(in Time-domain)
Software: Infolytica ThermNet
Real Life Simulation Examples
Coupled Electromagnetic-Thermal Analysis of GCB
Induced eddy-currents in the pole-frame
Real Life Simulation Examples
Coupled Electromagnetic-Thermal Analysis of GCB
Heating up of the breaker
under nominal operating conditions.
Real Life Simulation Examples
Coupled Electromagnetic-Thermal Analysis of GCB
Heating up test at the nominal current of 9’000A / 50Hz
Real Life Simulation Examples
Coupled Electromagnetic-Thermal Analysis of GCB
Simulations vs. measurements.
Real Life Simulation Examples
Coupled EM-Thermal Analysis of Power Transformers
In the area of the dry-type distribution transformers is the ABB Product Group Dry the
global technology- und market leader:
Global market size ~ 2’500 MUS$
ABB market share ~ 22%, 550 MUS$
Real Life Simulation Examples
Coupled EM-Thermal Analysis of Power Transformers
Real Life Simulation Examples
Coupled EM-Thermal Analysis of Power Transformers
J. Smajic, T. Steinmetz, B. Cranganu-Cretu, “Analysis of Near and Far Stray Magnetic Fields of Dry-Type
Transformers: 3D Simulations vs. Measurements”,
IEEE Transactions on Magnetics, Vol. 47, No. 5, pp. 1374-1377, May 2011.
Real Life Simulation Examples
Coupled EM-Thermal Analysis of Power Transformers
Real Life Simulation Examples
Coupled EM-Thermal Analysis of Power Transformers
Real Life Simulation Examples
Coupled EM-Thermal Analysis of Power Transformers
Real Life Simulation Examples
Coupled EM-Thermal Analysis of Power Transformers
Real Life Simulation Examples
Coupled EM-Thermal Analysis of Power Transformers
J. Smajic, T. Steinmetz, B. Cranganu-Cretu, “Analysis of Near and Far Stray Magnetic Fields of Dry-Type
Transformers: 3D Simulations vs. Measurements”,
IEEE Transactions on Magnetics, Vol. 47, No. 5, pp. 1374-1377, May 2011.

Download Report