According to the preset status of power supply and distribution at non-ferrous metal mines

both the theoretical and practice study on the generation

danger

and control and suppression technology of power harmonics is made. Then

on that basis

the selection scheme which suitable for power harmonic control and suppression of power supply and distribution system at non-ferrous metal mines is set up. The solution and practice for specific engineering case is made. The study result not only has important implications for non-ferrous metal mines

but also provides substantial reference value for controlling and suppressing power harmonics in the public utility system in China.