Abstract
This study includes an optimization of the input filter for three-phase matrix converters. An input filter effects on the power factor while improving the Total Harmonic Distortion (THD) of the input current. Unity power factor being one of the most important advantages of matrix converters will be eliminated if this is not taken into consideration. For this reason, an optimization was used by taking both parameters into consideration in this study. A Particle Swarm Optimization (PSO) algorithm was used in order to reduce the THD of the input current about 3% with nearly unit power factor as 0.985. The first of the optimization objective functions is to decrease the THD of the input current, and the second is to increase the power factor. The matrix converter was used for a constant frequency and modulation by using the switching strategy of Venturini Method and feeds an RL load. The optimized input filter was analyzed in detail in MATLAB/SimPowerSystems environment and examined in the results. Additionally, FFT spectra of the input and output waveforms are given in the results. Thus, the most suitable input filter was obtained for this system.
Highlights
MATRIX CONVERTER obtained with the development of the forced commutated cycloconverter based on bidirectional fully controlled switches consists of semiconductor elements and converts three-phase AC line voltages to three-phase variable voltage and frequency outputs [1], [2]
The input filter optimized for the matrix converter was tested for different output frequencies and 0.98 power factor value with 3% current Total Harmonic Distortion (THD) value was obtained in this study
A study was carried out to improve the power factor and current harmonic content values, which are important parameters for power electronics systems. These parameters can be improved in order to obtain desired values using a passive input filter with inductance and capacitor
Summary
MATRIX CONVERTER obtained with the development of the forced commutated cycloconverter based on bidirectional fully controlled switches consists of semiconductor elements and converts three-phase AC line voltages to three-phase variable voltage and frequency outputs [1], [2]. The PSO algorithm is used to optimize the power factor together with the input current harmonics of a matrix converter. The difficulty of this optimization problem; it negatively effects the power factor while increasing the component values of the input filter to improve the input current harmonic of the matrix converter. A matrix converter input filter was optimized for the input current Total Harmonic Distortion (THD) value below 5%, which can operate close to the unit power factor. The input filter optimized for the matrix converter was tested for different output frequencies and 0.98 power factor value with 3% current THD value was obtained in this study. This study has shown that optimization methods are very useful solutions for such applications
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