Use a Multi-level Series Active Filter Controlled by Sinusoidal Pulse Width Modulation Technology to Power Quality Enhancement in an Electrical Distribution Network
Keywords:
Power Quality, series active filter (SAF), multi-level inverter, synchronous reference frame theory, total harmonic distortion Total Harmonic Distortion (THD%).Abstract
The significant expansion of electrical networks and the increased sensitivity of devices to electrical disturbances have imposed severe restrictions on the power quality feeding the loads. The methodology for improving power quality using electronic devices is an effective solution to power quality problems.
In this paper, we suggest using the multi-level Series Active Filter (SAF) to address power quality problems related to voltage in distribution networks. The active filter was modeled in the MATLAB / Simulink platform, and the synchronous reference frame theory was applied to extract the reference voltage signals. Finally, those signals were compared with the measured voltage in the Sinusoidal Pulse Width Modulation (SPWM) system to generate the semi- conductors switches pulses.
The studied system was validated by simulating different voltage disturbances, then comparing the results if a two-level and multi-level filter was used. The results showed an improvement in the power quality when using the multi-level series active filter, and this appeared by reducing the total harmonic distortion factor that improves the voltage curve.
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