Power frequency magnetic field of heavy current transmit electricity lines based on simulation current method

With the increase of power transmission current electromagnetic environment around transmission lines has drawn so many attentions in recent years. This paper aimed at exceeds high-voltage current capacity to construct physical model of transmission line calculation of the magnetic field distribution. Magnetic field distribution around transmit electricity lines was calculated and analyzed based on domestic and international environmental standards. Simulations indicate that the region outside 7 m around the center axis met requirements. If current continues ascend, effect by the power frequency magnetic field will continue to expand.