DocumentCode :
2673765
Title :
Calculation of transformer saturated leakage inductance based on field test data
Author :
Nakachi, Yoshiki ; Hatano, Ryousuke ; Matsubara, Takumi ; Uemura, Yoichi
Author_Institution :
Electr. Power R & D Center, Chubu Electr. Power Co., Inc., Nagoya
fYear :
0
fDate :
0-0 0
Abstract :
In a black start of a power system, at times, an overvoltage could be caused by core saturation on the energization of a transformer with residual flux. Such an over-voltage might damage some equipment and delay power system restoration. Through an actual field test and EMTP simulations, we have found that such phenomena cannot be accurately simulated using a normal transformer model with inductance data measured during the factory test. This paper proposes a new calculation scheme of transformer inductance by using actual field test data in order to grasp the saturated transformer characteristics accurately. We also show an analytical scheme for calculating the leakage inductances from shunt currents in delta windings that give extensive influence to over-voltage under flux saturation
Keywords :
inductance; leakage currents; magnetic cores; magnetic flux; overvoltage; power transformer testing; transformer windings; EMTP simulations; black start; core saturation; delay; delta windings; field test data; flux saturation; normal transformer model; overvoltage; power system restoration; residual flux; shunt currents; transformer energization; transformer saturated leakage inductance; Circuit faults; Delay systems; EMTP; Inductance; Power system modeling; Power system restoration; Power system simulation; Testing; Transformer cores; Voltage control; flux; leakage inductance; saturated; saturation; shunt current; transformer;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Engineering Society General Meeting, 2006. IEEE
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0493-2
Type :
conf
DOI :
10.1109/PES.2006.1708984
Filename :
1708984
Link To Document :
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