4. Conclusion

This article deals with the study of control algorithms for the DC/AC stage included in a single-phase distributed generation system operating in isolated mode. The aim is to maintain a sinusoidal voltage of fixed amplitude and frequency with zero static error, regardless of load variation. Different types of correctors are studied, showing the advantage of using resonant correctors in current and voltage control loops.

The resonant corrector cancels out the drag error. Digital implementation of the adopted control algorithm on a TMS320F2808 DSP digital target has demonstrated the contribution of this type of corrector.