Over-voltage grid generating mechanism

Over-voltage power system can be divided into temporary overvoltage (power frequency overvoltage, air circuit breaker over-voltage arc grounding overvoltage), operating over-voltage, over-voltage lightning. Temporary overvoltage mainly by single-phase ground fault caused by resonance. Resonance over-voltage grid electrical equipment failure, or frequent operation of the device caused by grid inductance and capacitance matching resonant circuit constituted, Electric energy meter, excitation to generate electricity, magnetic energy conversion caused by over-voltage, in the case of the transformer magnetizing inductance and ground capacitance of the ferromagnetic resonance, which causes excessive voltage will be higher. Arc grounding overvoltage due to system ground fault occurs in the ground due to arcing caused by over-voltage.
Over-voltage due to the state power grid caused by mutations in the dramatic changes in electric meter energy, or large-capacity switching equipment, or the equipment caused by operational errors generated when the quick release of energy over-voltage. Mainly in the load circuit, the transformer breaking and reclosing.
Lightning in the atmosphere with a lot of positive and negatively charged cloud He Lei He Lei Yun encounter occurred Thundercloud discharge overvoltage caused. Lightning can be divided into direct lightning over-voltage and over-voltage sensing. Direct lightning overvoltages thundercloud directly to the devices, components, etc. generated by the discharge of a conductor, the induced voltage is the dramatic changes in the electromagnetic field generated.