DISTRIBUTION OF THE POWER OF THE A POWER ACTIVE FILTER BOOSTER TRANSFORMER FOR REGULATING OF THE NONLINEAR VOLTAGE DISTORTIONS COEFITIENT
DOI:
https://doi.org/10.15588/1607-6761-2018-3-2Keywords:
power quality, serial power active filter, series transformer, voltage distortionAbstract
Purpose. Investigate the parameters of the mode and distribution of the power of the transformer of the booster when adjusting the coefficient of the nonlinear distortion of the voltage.
Methodology. Methods of electrical engineering, numerical simulation methods, Fourier series methods.
Findings. The analysis of the transformer is carried out, the processes taking place in the transformer are considered, the filter model is developed in the visual programming environment, based on the analysis of which the application efficiency of the proposed solution is shown by the load voltage distortion. To assess the influence of the transformer on the operating mode of the device, a series of experiments was carried out. In the case of distortion of supply voltage, a serial active power filter is used that connects to the network through series transformers, which results in changes in the parameters of the equivalent power load circuit. As a result of the research it was established that the transformer of a series power active filter in the series mode, in case of compensation of voltage distortion of the network in general, has the voltage and current of the windings, the harmonic composition of which is different, this leads to a broad harmonious composition of the power of the transformer, which needs to account for the growth of losses in windings. and the magnetic circuit. The conclusions are drawn that to the effect of the parameters of the transformer on the operation of the active filter.
Originality. For the first time a model of an equivalent force single-phase sequential filter has been developed, which, unlike the existing one, takes into account the effect of the series transformer on the parameters of the mode.
Practical value. The internal resistance of the transformer and the load current lead to the emergence of voltage harmonics, which additionally affects its quality, and in the case of an experiment made up 2,35%. An increase in power losses in a transformer of a power active filter requires an adjustment of the method of its selection, taking into account distortion of voltage and current.
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