TY - GEN
T1 - High-frequency measurements on three-phase 50 Hz power transformers
AU - Rabinovici, Raul
AU - Zuckerberger, Adrian
AU - Reichman, Isar
AU - Bass, Simon
AU - Schwartzes, Moshe
PY - 2008/12/1
Y1 - 2008/12/1
N2 - The power transformers could face situations when a high frequency voltage of up to several MHz is superposed on the rated 50 Hz three-phase voltages. Examples could be Power On-Line Communications, lightning strokes, or switching surges. The high frequency voltages are identical voltages (common mode) on all the three phases of the power transformer, i.e., they form a zero-sequence three-phase voltages system that is superimposed on the 50 Hz directsequence three-phase rated voltages system. The paper presents experimental results regarding the behavior of a three-phase transformer in a common mode connection and excited by zero sequence voltages in the frequency range 100 Hz-100 kHz. A principal conclusion is that both the 'magnetizing' and leakage inductances are due to air magnetic fields. As a result, the 'magnetizing' inductance and 'core' losses are much lower than those of a three-phase transformer in a conventional connection and exited by three-phase direct sequence voltages.
AB - The power transformers could face situations when a high frequency voltage of up to several MHz is superposed on the rated 50 Hz three-phase voltages. Examples could be Power On-Line Communications, lightning strokes, or switching surges. The high frequency voltages are identical voltages (common mode) on all the three phases of the power transformer, i.e., they form a zero-sequence three-phase voltages system that is superimposed on the 50 Hz directsequence three-phase rated voltages system. The paper presents experimental results regarding the behavior of a three-phase transformer in a common mode connection and excited by zero sequence voltages in the frequency range 100 Hz-100 kHz. A principal conclusion is that both the 'magnetizing' and leakage inductances are due to air magnetic fields. As a result, the 'magnetizing' inductance and 'core' losses are much lower than those of a three-phase transformer in a conventional connection and exited by three-phase direct sequence voltages.
KW - Power system modeling
KW - Power system simulation
KW - Power transformer testing
UR - http://www.scopus.com/inward/record.url?scp=62749151010&partnerID=8YFLogxK
U2 - 10.1109/EEEI.2008.4736684
DO - 10.1109/EEEI.2008.4736684
M3 - Conference contribution
AN - SCOPUS:62749151010
SN - 9781424424825
T3 - IEEE Convention of Electrical and Electronics Engineers in Israel, Proceedings
SP - 185
EP - 189
BT - 2008 IEEE 25th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2008
T2 - 2008 IEEE 25th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2008
Y2 - 3 December 2008 through 5 December 2008
ER -
