Abstract
Grid fundamental harmonic measurement in presence of Gaussian frequency deviation using 2-bit flash A/D converter
Highlights
Voltages and currents in the modern smart grids and in the European Interconnection are increasingly nonsinusoidal, due to the use of power electronic converters, on both consumption and local generation sides
Accurate measurements of voltage and/or current fundamental harmonic in such non-sinusoidal regimes are important, because they define the fundamental components of active and reactive electrical power and energy, which are the subject of contracts and delivery [1]
The fundamental harmonics of voltage and current are crucial for defining the total harmonic distortion (THD) factor of power delivery and consumption, respectively
Summary
Voltages and currents in the modern smart grids and in the European Interconnection are increasingly nonsinusoidal, due to the use of power electronic converters, on both consumption and local generation sides. Vast majority of methods and instruments assume the period of exactly 20 ms and measurements of harmonics within modern power grids are very accurate when the mains frequency is precisely 50 Hz. the accuracy is compromised when the frequency varies [2], which is the common occurrence in the European Interconnection [3]. Advances in modern electronic components technology have given us simple, reliable and Tehnički vjesnik 24, 2(2017), 481-488 extremely fast 2-bit flash A/D converters. They have been introduced in applications of stochastic digital measurement method (SDMM) [6, 7] for precise and accurate measurements. Its accuracy and precision are validated by realistic simulations, in which the frequency of input signal is changed in the same manner as in the grid, determined over the 7-day period
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