Transcript Technical University of Białystok

Technical University
of
Bialystok
MSc Jarosław WIATER
New MOV element
model with hysteresis
loop in ATP/EMTP
New MOV element model with hysteresis loop
in ATP / EMTP
1.
2.
3.
4.
5.
Introduction
Surge arrester with hysteresis loop
New model
Verification
Conclusions
New MOV element model with hysteresis loop
in ATP / EMTP
1. Introduction
o
ATP/EMTP uses MOA element
o
Limitations of MOA
o
Hysteresis loop
New MOV element model with hysteresis loop
in ATP / EMTP
2. Surge arrester with hysteresis loop
8/20s
New MOV element model with hysteresis loop
in ATP / EMTP
2. Surge arrester with hysteresis loop
New MOV element model with hysteresis loop
in ATP / EMTP
2. Surge arrester with hysteresis loop
New MOV element model with hysteresis loop
in ATP / EMTP
2. Surge arrester with hysteresis loop
o
maximum continuous operating voltage
Uc=275V
o rated voltage
Ur<1500V
o nominal discharge current
In=20kA
o maximum discharge current
Imax=40kA
New MOV element model with hysteresis loop
in ATP / EMTP
3. New model
New MOV element model with hysteresis loop
in ATP / EMTP
4. Verification
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 it’s easy to improve in future by simple ATP/EMTP user