Design and implementation of grid connection photovoltaic micro inverter

Author

Lai, Wei-Fu ; Chen, Shih-Ming ; Liang, Tsorng-Juu ; Lee, Kuan-Wen ; Ioinovici, Adrian

Author_Institution

Dept. of Electr. Eng., Nat. Cheng-Kung Univ., Tainan, Taiwan

fYear

2012

fDate

15-20 Sept. 2012

Firstpage

2426

Lastpage

2432

Abstract

A 200 W photovoltaic (PV) micro inverter is designed and implemented in this paper. The proposed inverter includes a high step-up DC-DC converter and a SPWM H-bridge inverter. It transfers solar energy into sinusoidal voltage waveform. The operating principles and the steady-state analysis of continuous conduction modes of the high step-up converter are discussed. The DSP controller TMS320LF2407A is used to achieve the system starting check, abnormal state detection, and maximum power point tracking as well as islanding detection. Finally, a prototype circuit with input range from 20 V to 40 V and 220 V_rms/200 W output is implemented.

Keywords

DC-DC power convertors; digital signal processing chips; maximum power point trackers; microcontrollers; power grids; solar cells; DSP controller; SPWM H-bridge inverter; TMS320LF2407A; abnormal state detection; continuous conduction modes; grid connection photovoltaic microinverter; high step-up DC-DC converter; islanding detection; maximum power point tracking; power 200 W; sinusoidal voltage waveform; solar energy; voltage 20 V to 40 V; voltage 220 V; Capacitors; Inductance; Inductors; Inverters; Switches; Switching frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2012 IEEE

Conference_Location

Raleigh, NC

Print_ISBN

978-1-4673-0802-1

Electronic_ISBN

978-1-4673-0801-4

Type

conf

DOI

10.1109/ECCE.2012.6342407

Filename

6342407