TY - GEN
T1 - Ferroresonance characteristics in unsymmetrical flux distribution of 150 KV three phase transformer
AU - Negara, I. Made Yulistya
AU - Hernanda, I. Gusti Ngurah Satriyadi
AU - Asfani, Dimas Anton
AU - Fahmi, Daniar
AU - Afif, Yusrizal
AU - Wahyudi, Mochammad
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/12/19
Y1 - 2017/12/19
N2 - Iron core of transformer somehow always have non-linear hysteresis characteristics. Generally, they are symmetry on their three legs of iron core. However, it may also suffer from unsymmetrical flux hysteresis characteristic due to inappropriate or special design. On the other hand, transformer is very sensitive to ferroresonance if it works on saturation area of its flux characteristic. Therefore, the effect of unsymmetrical flux distribution in three phases 150/20 kV power transformer on ferroresonance phenomenon was studied in this paper. Ferroresonance characteristics of symmetrical flux hysteresis of transformer were simulated using ATP/EMTP and the results were compared with the one of unsymmetrical. The result showed that at symmetrical condition, the overvoltage due to ferroresonance reached 389.81 kV on primary side and 23.54 kV on secondary one. Current response showed that current on primary and secondary sides increased until 1516.6 A and 2040.1 A, respectively. Under unsymmetrical condition the overvoltage became higher of about 2.27% from symmetrical condition. Different characteristics of ferroresonance were found on the transformer with smaller flux hysteresis because one leg was already work on its saturation area.
AB - Iron core of transformer somehow always have non-linear hysteresis characteristics. Generally, they are symmetry on their three legs of iron core. However, it may also suffer from unsymmetrical flux hysteresis characteristic due to inappropriate or special design. On the other hand, transformer is very sensitive to ferroresonance if it works on saturation area of its flux characteristic. Therefore, the effect of unsymmetrical flux distribution in three phases 150/20 kV power transformer on ferroresonance phenomenon was studied in this paper. Ferroresonance characteristics of symmetrical flux hysteresis of transformer were simulated using ATP/EMTP and the results were compared with the one of unsymmetrical. The result showed that at symmetrical condition, the overvoltage due to ferroresonance reached 389.81 kV on primary side and 23.54 kV on secondary one. Current response showed that current on primary and secondary sides increased until 1516.6 A and 2040.1 A, respectively. Under unsymmetrical condition the overvoltage became higher of about 2.27% from symmetrical condition. Different characteristics of ferroresonance were found on the transformer with smaller flux hysteresis because one leg was already work on its saturation area.
KW - ATP/EMTP
KW - ferroresonance
KW - overvoltage
UR - http://www.scopus.com/inward/record.url?scp=85044249974&partnerID=8YFLogxK
U2 - 10.1109/TENCON.2017.8227840
DO - 10.1109/TENCON.2017.8227840
M3 - Conference contribution
AN - SCOPUS:85044249974
T3 - IEEE Region 10 Annual International Conference, Proceedings/TENCON
SP - 78
EP - 81
BT - TENCON 2017 - 2017 IEEE Region 10 Conference
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2017 IEEE Region 10 Conference, TENCON 2017
Y2 - 5 November 2017 through 8 November 2017
ER -