Modeling of Matrix Fault Current Limiter and Its Verifica on

16 Pages·2011·1.75 MB·English

by  Dario Schor

1

High Voltage Institute of
University of Tehran

Modeling
 of
 Matrix
 Fault
 Current
 Limiter

and
 Its
 VerificaBon

Authors:

Amin
 Mohseni,
 Saeed
 Mohajer
 Yami,
 Amir
 Abbas
 Shayegani
 Akmal

October 5 – 2011
Winnipeg,
 Manitoba,
 Canada

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INTRODUCTION

!  
THEORETICAL
 MODEL
 OF
 Bi2212
 SFCL

!  
Basic
 principle
 of
 SFCL

!  
E-­‐J
 Characteris@cs
 of
 Bi2212

!  
MFCL
 CONCEPT
 AND
 DESIGN

!  
MFCL
 architecture

!  
Arrangement
 of
 numerically
 analyzed
 setup

!  
SIMULATION
 RESULTS

!  
CONCLUSION

!  
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INTRODUCTION

Importance of fault current limiting
!  
Viable solutions:
!  
 Upgrade existing substation equipment especially circuit
breakers with higher capability
 Use of fault current limiters (FCL)
•  Series reactors
•  High-impedance transformers
•  Resonance-based

•  Superconducting fault current limiter (SFCL)
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Superconducting Fault Current Limiter
(SFCL)
Superconducting (SC) materials
!  
Low AC loss in normal operation
 
High mechanical strength
 
Good thermal stability
 
Low temperature superconductors (LTS)
!  
High cooling costs
 
High Temperature Superconductors (HTS)
!  
Less cooling costs
 
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THEORETICAL
 MODEL
 OF
 Bi2212

SFCL

Basic principle of SFCL
!  
 Superconductor
 resis2vity

 Rapidly
 increasing
 temperature
 and

resistance
 at
 the
 fault
 condi2on

0 superconducting state
ρ= ρ(j,T,B) flux-flow state
ρ(T) normal conducting state
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E-J characteristics of Bi2212
!  
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Under
 the
 hypothesis
 of

adiabaBc
 condiBon,
 the

temperature
 rise
 is:

Resistance
 of
 superconductor:

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MFCL
 CONCEPT
 AND
 DESIGN

 Reliable and cost-effective fault current limiting device,
especially for transmission voltage level applications
  Able to detect and limit fault currents, and subsequently recover to its
superconducting state automatically without resorting to active switching
and controlling mechanisms.
  Invisible to the power system with no major device loss or substantial
voltage drop.
  Composed of modular components that enable scalability for a range of
applications.
  Highly reliable with built-in redundancy in the design, such that a failure of
any individual component does not result in a failure of the entire device.
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MFCL
 Architecture
!  
 Basic module of an MFCL:
1)  Trigger part
2)  Current limiting part
•  Superconducting element R
•  Shunted coil element L
 Advantages:
  Fast quenching of superconducting elements
  Reduce
 the
 I2R
 hea2ng
 of
 the
 superconduc2ng
 elements

  Fast recovery of superconducting element
  Make the system more reliable
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m n
× matrix architecture
!  
m
  current-limiting modules in series
(peak
 value
 of
 the
 normal
 opera2ng
 current
 level)
n
  current-limiting matrix elements in parallel
(current
 limi2ng
 impedance
 needed
 for
 a
 specific
 network)
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