On the design of power quality signal amplifier

Design and realization of power quality signal amplifier is described. The amplifier is intended to amplify a digital-to-analog converter output signal to the nominal power line voltage levels. Such an amplifier is commonly used to simulate power quality disturbances in order to test instrument performances, or to analyze the behavior of different electronic devices. The amplifier is designed according the power quality standard EN50160, i.e. the passband of the amplifier is up to the 50
^th
harmonic of the nominal power line frequency. In the paper, experimental tests on commercial power quality instrument are presented.