Transformerless distribution voltage restorer using diode-clamped three-level converter

This paper presents development distribution voltage restorer (DVR) using three-level diode-clamped converter for creating voltage to compensate using power electronics switching device. Converter is controlled the injection voltage by using voltage regulations without transformer connected to the power system. Low-pass filter is used to filter harmonics voltage signal and reduce voltage signal distortion. Simulation and experimental results show the effectiveness of the proposed DVR that the output voltage waveform of three-level diode-clamped converter has a signal distortion less than output voltage waveform of original two-level converter. The experimental results also showed that the DVR can increase the system efficiency and be able to compensate the voltage more than 0.1 second.