Atikah Sari, Syafruddin Hasan, Erwin Sutanto, Pradini Puspitaningayu, Muhammad Aziz, Fahmi Fahmi
This study presents the design and harmonic analysis of a single-phase inverter using Sinusoidal Pulse Width Modulation (SPWM) to convert DC voltage from a photovoltaic (PV) source into an AC output. A Boost Converter is used to raise the input voltage to 197 V DC, followed by a full-bridge SPWM inverter to generate an alternating voltage waveform. However, the inverter output inherently contains harmonic distortions due to high-frequency switching. To address this issue, an LC filter is introduced at the inverter output to suppress harmonic components and improve the waveform quality. The system is modeled and simulated in Software. Fast Fourier Transform (FFT) analysis is employed to evaluate harmonic content and Total Harmonic Distortion (THD) before and after the filter. Simulation results show that the fundamental frequency at 50 Hz is dominant, and the use of the LC filter effectively reduces the amplitude of higher-order harmonics while enhancing the sinusoidal shape of the voltage output. The filtered output achieves a significantly lower THD, indicating improved power quality suitable for residential or grid-connected applications. © 2025 IEEE.
Universitas Sumatera Utara, Department of Electrical Engineering, Medan, Indonesia; Universitas Airlangga, Department of Physics, Surabaya, Indonesia; Universitas Negeri Surabaya, Department of Electrical Engineering, Surabaya, Indonesia; University of Tokyo, Institute of Industrial Science, Tokyo, Japan
