# Studi Watak Harmonik pada Rectifier dalam Kondisi Berbeban dan Tanpa Beban

**Abstrac**: A power electronic equipment that is used for the aplication of drive system in industry to control direct current voltage, is a nonlinear load and a harmonic source. Refer to the nonlinear characteristic of solid state power convertion equipment, harmonic current will be injected in the power system, making voltage harmonic distortion. The goals of this research are to know the characteristics of current and voltage harmonic, to analyze of curent and voltage total harmonic distortion, and to determine the parameters of low passpassive filters that will be used to decrease the harmonic current and voltage in the rectifier. This research was done experimentaly by three observation conditions at laboratory, namely by changing the voltage of output at the condition of loaded andnonloaded, and to change load current of rectifier. The results of this reseach showed that under noload condition the highest harmonic voltage was found at the third order of harmonic, and for the highest harmonic current accured at the fifth order of harmonic, with the highest value of voltage and current total harmonic distortion 3,092% and 45,32%. Under load condition the highest harmonic voltage was found at the fifth order ofharmonic, and for the highest harmonic current on second order of harmonic, with the highest value of voltage and current total harmonic distortion 2,850% and 67,23%. Under changing load current condition the highest harmonic voltage was found at the fifth order of harmonic, and for the highest harmonic current on second order of harmonic, with thehighest value of voltage and current total harmonic distortion 2,680% and 44,02%.

**Penulis**: Sujito

Kode Jurnal:

**jptlisetrodd050050**