Makov D.K.

New Metod of Measuring of Symmetric Sequences of Three-Phase Voltage

This article concerns the digital determination of three-phase quality indexes of electric power – coefficient of asymmetry on a negative sequence, rejection and oscillation of fundamental frequency voltage. These indexes are characterized by voltages of negative (VNS) and direct (VDS) sequences of fundamental frequency.

Errors Analysis of Measuring Instruments of Three-phase Voltage Asymmetry

This article is devoted to the increase of exactness of measuring three-phase indexes of quality of electric power in the systems of three-phase power supply. We analyze transformation equations of three-phase voltage of six-pole is in-process executed with three by an entrance and by three output clamps. We show that four complex coefficients fully characterizing this six-pole can be entered.