The Effect of Excitation Characteristics of Electromagnetic Voltage Transformer on Ferromagnetic Chaotic Circuit

doi:10.11930/j.issn.1004-9649.201806121

Abstract

Abstract: In power system, the ferromagnetic chaotic circuit of electromagnetic voltage transformer (TV) may generate chaotic oscillations in some cases. The main reason is the magnetic saturation effect of TV core that leads to the non-linear change of inductance of core. In actual research, the excitation characteristic curve is often used to describe the nonlinear change of the TV core inductance. A fourth-order autonomous ferromagnetic circuit model with TV is introduced, and the influence of excitation characteristics of TV on ferromagnetic circuit is studied. Theoretical analysis and MATLAB simulation shows that chaotic oscillation exists in the circuit, and the nonlinear excitation characteristics of TV are the important factors that affect the chaotic dynamic behavior of the circuit.

Key words: power system, ferromagnetic chaos, excitation characteristics, nonlinear

CLC Number:

TM864

WANG Dongdong, TIAN Mingxing, ZHANG Huiying. The Effect of Excitation Characteristics of Electromagnetic Voltage Transformer on Ferromagnetic Chaotic Circuit[J]. Electric Power, 2019, 52(5): 70-75,112.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201806121

https://www.electricpower.com.cn/EN/Y2019/V52/I5/70

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