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Comparison between FPGA-Based and dsPIC-Based islanding detection for grid connected inverter in a photovoltaic system

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4 Author(s)
Tunlasakun, K. ; King Mongkut''s Univ. of Technol. Thonburi, Bangkok ; Kirtikara, K. ; Thepa, S. ; Monyakul, V.

This paper presents the comparison between FPGA-based and dsPIC-based islanding detection for grid connected inverter in photovoltaic (PV) system with under/over voltage and under/over frequency islanding detection algorithms. The comparison is based on the XC4005E field programmable gate array (FPGA) and the dsPIC30F2010 high-performance digital signal controller. The prototypes of the FPGA and the dsPIC are monitor the grid voltage and grid frequency at the point of common coupling (PCC) between the grid connected inverter, the local load and the distribution transformer and processed the value of voltage and frequency for turned off the relay between the grid connected inverter and the utility grid. The results of study, the prototypes can turn off the relay when the voltage is change under 200 V or over 240 V and frequency is change under 48 Hz or over 52 Hz. The FPGA-based is turn off the relay faster than the dsPIC-based but the cost of design and implement is higher.

Published in:

Control, Automation and Systems, 2007. ICCAS '07. International Conference on

Date of Conference:

17-20 Oct. 2007