Technical University of Bialystok

1
Technical UniversityofBialystok

• MSc Jaroslaw WIATER

New MOV element model with hysteresis loop in
ATP/EMTP
2
New MOV element model with hysteresis loop in ATP
/ EMTP
1. Introduction2. Surge arrester with hysteresis
loop3. New model4. Verification5. Conclusions
Technical University of Bialystok
3
New MOV element model with hysteresis loop in ATP
/ EMTP

• 1. Introduction
• ATP/EMTP uses MOA element
• Limitations of MOA
• Hysteresis loop

Technical University of Bialystok
4
New MOV element model with hysteresis loop in ATP
/ EMTP
2. Surge arrester with hysteresis loop
8/20?s
Technical University of Bialystok
5
New MOV element model with hysteresis loop in ATP
/ EMTP
2. Surge arrester with hysteresis loop
Technical University of Bialystok
6
New MOV element model with hysteresis loop in ATP
/ EMTP
2. Surge arrester with hysteresis loop
Technical University of Bialystok
7
New MOV element model with hysteresis loop in ATP
/ EMTP
2. Surge arrester with hysteresis loop

• o maximum continuous operating voltage Uc275V
• o rated voltage Urlt1500V
• o nominal discharge current In20kA
• o maximum discharge current Imax40kA

Technical University of Bialystok
8
New MOV element model with hysteresis loop in ATP
/ EMTP
3. New model
Technical University of Bialystok
9
New MOV element model with hysteresis loop in ATP
/ EMTP
4. Verification
Technical University of Bialystok
10
New MOV element model with hysteresis loop in ATP
/ EMTP

• 5. Conclusions
• o precisely approximates surge arrester
  characteristic
• o real MOA V-I characteristic can be directly
  transferred from o digital measurement to
  computer simulation program
• o there is no need to approximate any MOA analog
• parameters
• o new model can be also use for any non-linear
  element with o hysteresis loop in V-I
  characteristic or not too
• o tricky algorithm eliminates oscillation during
  step
• parameter change
• o its easy to improve in future by simple
  ATP/EMTP user

Technical University of Bialystok