Title :
Study on ferroresonance due to electromagnetic PT in ungrounded neutral system
Author :
Xukai, Zhu ; Yihan, Yang ; Hongbo, Lian ; Weipu, Tan
Author_Institution :
Dept. of Electr. Eng., North China Electr. Power Univ., China
Abstract :
In ungrounded neutral system, ferroresonance arising from the interaction between the nonlinear characteristics of the electromagnetic potential transformer (PT) core with system capacitance takes place frequently. Under different system capacitance, ferroresonance of different frequency may occur: fundamental frequency ferroresonance, subharmonic ferroresonance and harmonic ferroresonance. In this paper, we use mathematical models and analytic techniques to the study of this phenomenon. And experimental study in the laboratory verifies the precision of the result analyzed.
Keywords :
cores; ferroresonance; potential transformers; power transformers; electromagnetic potential transformer core; fundamental frequency ferroresonance; mathematical models; subharmonic ferroresonance; ungrounded neutral system; Capacitance; Ferroresonance; Frequency; Impedance; Inductance; Magnetization; Mathematical model; RLC circuits; Resonance; Voltage;
Conference_Titel :
Power System Technology, 2004. PowerCon 2004. 2004 International Conference on
Print_ISBN :
0-7803-8610-8
DOI :
10.1109/ICPST.2004.1460126
