Title :
Five-stepped PWM inverter used in photovoltaic systems
Author :
Ohsato, Masato H. ; Kimura, Gunji ; Shioya, Mitsuo
Author_Institution :
Fac. of Technol., Tokyo Metropolitan Univ., Japan
fDate :
10/1/1991 12:00:00 AM
Abstract :
A PWM (pulse-width-modulated) inverter that has five-stepped output-voltage levels is introduced. In this inverter, the waveform of the output voltage has a smaller harmonic content than that of a conventional PWM inverter. A novel PWM technique is analyzed. The PWM pulses included in the waveform of the output voltage are formed using a criterion based on the calculation that each area of voltage pulses is equal to the integrated value of each time shared area of a reference sinusoidal waveform. This PWM technique for the five-stepped PWM inverter is superior to the conventional PWM technique, and the experimental results coincided with the calculation obtained using the fast Fourier transform. In addition, the relations between the number of PWM pulses and the harmonic contents of the output voltage are described
Keywords :
invertors; photovoltaic power systems; pulse width modulation; PV power systems; PWM inverter; fast Fourier transform; harmonic content; voltage pulses; waveform; Acoustic distortion; Batteries; Circuits; Frequency; Harmonic distortion; Photovoltaic systems; Pulse width modulation; Pulse width modulation inverters; Space vector pulse width modulation; Voltage;
Journal_Title :
Industrial Electronics, IEEE Transactions on
