Issues of Using Power Quality Analyzers to Measure Non-linear Load Modes

Examples are presented with the results of measuring the quality of electrical energy in networks with non-linear loads containing harmonic components with frequencies above 2 kHz. The possibility of obtaining unreliable information about the levels of harmonic distortion in such networks is shown when using devices designed in accordance with the requirements of state standard 321442013.The influence of the procedures of multiple averaging of measurement results provided by the standard on the calculated values of voltage and current harmonics, as well as active and reactive power in networks containing powerful sharply variable and impulse loads, is illustrated.