电磁式电压互感器励磁特性对铁磁混沌电路的影响分析

电力系统中，含电磁式电压互感器（TV）的电路在某些情况下可能产生混沌振荡想象，其主要原因是TV铁芯的磁饱和效应导致铁芯电感非线性变化，在实际研究中常用励磁特性曲线描述TV铁芯电感的非线性变化。引用一个含TV的四阶自治铁磁电路模型，研究了TV励磁特性对铁磁电路的影响。理论分析与仿真结果表明：铁磁电路系统中存在混沌振荡现象，电磁式电压互感器非线性励磁特性是影响该电路混沌动力学行为的重要因素。

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

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.