Novel Approach to Collect and Process Power Quality Data in Medium-Voltage Distribution Grids

The paper is devoted to the development of structure a fast and flexible data collecting system based on proposed approach measure power quality indicators in three-phase medium-voltage distribution grids with an example Mikhailovsky mining processing plant. utilizes properties space vector, obtained from grid currents voltages disturbed waveform, allow faster extraction harmonic components compared traditional approaches, direct Fourier-transform applied line or phase values. During study, concept universal measurement device was introduced, which allows estimation following values at node: magnitudes phases voltage current components, active reactive harmonics fundamental positive negative instantaneous powers. interconnected control units for considered node simultaneous operation two variable frequency drives rectifiers accordance Internet things. benefits solution are shown by model operating draglines nonlinear load, developed MATLAB/Simulink software. utilized produce distributed references systems inverters compensate currents, allowed significantly improve THDi input power.