This paper presents a PQ four quadrant four-wire three-phase inverter for microgrids integration. The
inverter is based in two full-bridge IGBT modules connected in a three-phase configuration plus a threephase
parallelized neutral branch. This topology is galvanically isolated through a single-phase transformer
bank. The converter operates as a non-ideal voltage-controlled voltage source inverter under AC
droop strategy with hot-swap capability based on a dynamic virtual impedance.
Heredero-Peris, D., Pages, M., Montesinos-Miracle, D. Inverter design for four-wire microgrids. A: European Conference on Power Electronics and Applications. "17th European Conference on Power Electronics and Applications". Ginebra: 2015, p. 1-10.