Comparison of H-bridge single-phase transformerless PV string inverters

Analysis of the Robustness of Transformerless PV Inverter Topologies to the Choice of Power Devices

“…The obtained results in a 3 kW setup show that H6 results in the lowest leakage current (29.4 mA) and the highest efficiency corresponds to paralleled-buck topology (η EU = 97.8 %) follwed by HERIC (η EU = 97.5 %). Similar analyses have been carried out in [23] and [24] and, in all cases, the obtained results, both in simulation and experimentally, are valid for the specifically considered power devices selected for simulation purposes or the implementation of prototypes. The variability of IGBT and diode parameters due to the employed technology and the characteristics of the manufacturing process is considered in [25], where a statistical approach for performance evaluation of transformer-based H4 topology is proposed.…”

Sensitivity analysis of transformerless PV inverter topologies to physical variations of power devices

“…The obtained results show that HERIC topology results in a higher efficiency (96.05 %) and the lowest leakage current corresponds to HBZVR-D (42.7 mA). Similar analyses have been carried out in [8] and [9] and, in all cases, the obtained results, both in simulation and experimentally, are valid for the case of the power devices selected for simulation purposes or the implementation of prototypes.…”

Robustness evaluation of transformerless PV inverter topologies

“…The obtained results show that HERIC topology results in a higher efficiency (96.05 %) and the lowest leakage current corresponds to HBZVR-D (42.7 mA). Similar analyses have been carried out in [8] and [9] and, in all cases, the obtained results, both in simulation and experimentally, correspond to some power devices selected for simulation purposes or the implementation of prototypes. This work considers the approach shown in [10], where a statistical approach is proposed for evaluation of the H4 topology and selection of the most suitable power devices for its implementation in 1φ PV inverters.…”