Abstract
This paper presents a single-phase five-level grid-connected photovoltaic inverter with a novel dual reference modulation technique. Two reference signals identical to each other with an offset equivalent to the amplitude of the triangular carrier signal were used to generate pulse width modulation (PWM) signals. The inverter consists of a full-bridge inverter and an auxiliary circuit comprising of four diodes and a switch. The inverter produces output voltage in five levels: 0, +1/2Vdc, Vdc, −1/2Vdc, and −Vdc. A digital proportional-integral (PI) current control algorithm is implemented in DSP TMS320F2812 to keep the current injected into the grid sinusoidal and to have high dynamic performance with low total harmonic distortion (THD). The validity of the proposed inverter is verified through simulation and is implemented in a prototype. The experimental results are compared to conventional single-phase three-level grid-connected pulse width modulation (PWM) inverter in terms of THD.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
