FIELD: physics.
SUBSTANCE: in the dynamic simulation system of the electromagnetic transient process, thunderstorm transmission lines based on power line and ground cable models, support models and the grounding of the support and the insulator model, the support is divided into a piece of slanting material, a section of the beam and a section of the main part. At the same time, the factors of the insulator, power transmission line and grounding cable are taken into account and appropriate impedance, intrinsic impedance, mutual impedance, intrinsic conductivity, mutual total conductivity and inductance are used to simulate and create an equivalent lightning strike state transition circuit.
EFFECT: ability to accurately analyze the spread of a thunderstorm wave in the power line, the ability to identify the type of arc blocking a direct impact or lightning strike in the power line cable.
5 cl, 10 dwg
