The paper presents a consequences of application a converter supply system in electro energetic grid of middle and high voltages, supplied a great power drive system (over 1000 kW), and their influences on quality of electric energy in industrial plants. Problems of influence electromagnetic and electrostatic fields generated from electro energetic grid, on surround environmental is analyzed in the paper The paper presents a mathematical analysis of phenomenon to occur in industrial plants of electro energetic grid of middle and high voltages, with great power load systems. A computer model of electro energetic supply system considerate a magnetic and electric field distribution are also presented in paper. For reduction of parasitic harmonics level in current supply and voltage supply are mostly applied a static capacitor filter. For reduction a negative influences of magnetic and electric field distribution on surround environments to work up a special criteria reduced an harmfully interaction. The paper present a solution with static and active power filters in reduction of high harmonics levels. Some results of computer simulation performed for selected electro energetic grid configuration, with and without active filter are presented in the paper. Results of industrial measurement are also presented in the paper