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Observer based online current offset compensation method for single-phase photovoltaic inverter applications

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1 Author(s)
Cho, Y. ; Dept. of Electr. & Comput. Eng., Virginia Tech, Blacksburg, VA, USA

An online current offset compensation method is proposed for photovoltaic (PV) inverter applications. In order to detect a current offset in the system, a simple full order observer is designed. By assuming the current offset to be a DC component in steady state, the observer gain selection becomes extremely easy. After that, a simple feed-forward compensation method is applied to eliminate the current offset. The proposed method is experimentally verified by using a PV inverter prototype.

Published in:

Electronics Letters  (Volume:48 ,  Issue: 23 )