动车组过分相铁磁谐振及抑制方法仿真研究

Simulation Study of Methods for restraining and EMU Passing Phase Ferroresonance

铁磁谐振是电力系统中的一种常见现象,铁路应用的电磁式电压互感器和机车上的电容、电感等元件组成谐振回路,也会引发铁磁谐振。铁磁谐振产生的过电压和过电流严重影响电力系统和铁路机车的正常运行。以动车组过分相过程为例分析电压互感器铁磁谐振,利用Matlab仿真软件对过分相过程及抑制方法进行建模仿真,并提出一种新的方法可有效地抑制电力机车分相区铁磁振荡的过电压和过电流,提高了电力机车运行的安全稳定性,最后总结当前抑制过分相过电压的方法。

Ferromagnetic resonance is a common phenomenon in power system, electromagnetic voltage transformer applied in railway and capacitance and inductance on the locomotive, these build a resonance circuit, also can cause ferroresonance. Ferromagnetic resonance overvoltage and overcurrent generated seriously affect the normal operation of the power system and the railway locomotive. In this paper, taking EMU passing phase separation processes occurring process of ferromagnetic resonance of voltage transformer as an example to make simulation analysis; the Matlab simulation software is used to simulate passing phase separation process and suppression method; and a new control method is proposed which can effectively control overvohage and overcurrent in the phase area of iron magnetic oscillation. The security and stability of the locomotive running is improved. Finally, the current methods inhibiting excessive phase overvohage is summarized.