基频铁磁谐振的理论及仿真研究

基频铁磁谐振频繁发生于电力系统之中,严重威胁电力系统的安全稳定运行.本文利用理论分析方法研究了典型铁磁谐振电路的基频铁磁谐振,用非线性曲线表达式描述非线性电感的饱和特性,并考虑了回路电阻对谐振的影响,给出了求解各参数导致系统发生谐振的临界值的方法,并利用实验的方法验证了理论分析中电源电压对铁磁谐振影响的正确性.研究结果表明:该理论分析方法能够很好地分析基频铁磁谐振及其影响因素,为合理设计电力系统参数提供有力的依据;铁芯损耗越小,电源电压越高,回路电阻越小,回路电容越小,系统发生铁磁谐振的可能性越大.

Analysis of fundamental frequency ferroresonance based on theoretical study and simulation method

Fundamental frequency ferroresonance frequently occurs in the power system,the overvoltage and overcurrent generated by ferroresonance will endanger the facilities in the power system,and they are harmful.Theoretical method is used in this paper to study fundamental frequency ferroresonance in a typical circuit in which ferroersonance may occur.Nonlinear curve is used to represent the magnetization characteristic of nonlinear inductor,resistance in the circuit is considered,the method used for calculating t...