电力系统铁磁谐振数字仿真及防范措施

铁磁式电压互感器TV是一种带铁心的电感元件,具有非线性的特点,在不同的激励条件下(系统发生短路接地故障、倒闸操作等)其电抗值会发生变化,容易与系统中的电容元件产生谐振.一般把带铁心的电感与电容元件产生的谐振称为铁磁谐振.铁磁谐振可使系统产生过电压或电流,铁磁谐振具有稳态性质,谐振时的过电压、过电流持续时间较长,能危及电...

The Digital Simulation of Ferromagnetic Resonance in Power System and Its Suppression Measures

Ferromagnetic voltage transformer is a kind of core inductor with non-linear characteristics. The reactance value will change under different excitation conditions （short circuit earth fault, switching operation, etc. ）, The reactance is easily to have a resonance with the capacitive elements in the system. Resonant with the core of the inductor and capacitor components generally referred to as ferroresonance. Overvoltage or overcurrent of ferroresonance with the steady-state nature of the ferromagnetic resonance often occurs in power system The overcurrent or overvoltage of ferroresonance does great harm to the insulation of electrical equipment, bums the voltage transformers, impacts protection devices, threatens power system operation. This paper, using electromagnetic simulation software in the neutral power system, studies the preventive effect of the ferromagnetic resonance measures, and analyzes the advanta-ges and disadvantages of various measures and the scope of application.