The Studies Of Power Frequency Magnetic Shielding Of Reactor

In the modern power system, the reactor has been used more widely than before. Air-core reactor can cause electromagnetic pollution, for it has serious magnetic field divergence and strong penetrability problems without closed magnetic loop.This paper has proposed one numerical computation method which is applied to shield the magnetic field around power frequency reactor .According to the magnetic theory, there is eddy current generated in metal plate when it is used as the shield material. The FE-BE coupling method is adopted to calculate 3D eddy current. The magnetic vector potential A can be got by solving the coupling equations, and then deducing the formula of magnetic flux density B , finally the value of B can be calculated indirectly by A at the boundary of eddy current area. By the adjustment of shielding position and comparison of under different situations, the shielding scheme that meets requirements can be finally found. The original software of FE-BE coupling analysis is used and improved for widely application. At last, Ansys is used to testify the correctness and rationality of this practical example. B...