Reinforcement Learning in Real-World Environments: Challenges and Opportunities
International Journal of Mechanical Engineering · 2023
Due to their appealing qualities in power quality and ease of expansion compared to two-level or three-level inverters, cascaded H-bridge (CHB) inverters have been widely used in distributed photovoltaic (PV) power generating systems.Because they can automatically balance the power difference between phases, modular inverters with an interphase structure made up of four-port isolated DC/DC converters and CHB inverters are mainly preferred by academia and industry.Such modular inverters still have a few problems that need to be fixed, including power imbalance between modules in the same phase.This could endanger the safe and stable operation of the complete modular inverter and cause over-modulation of some Hbridge inverter modules and grid-connected current distortion.This work proposes an AC voltage balancer to establish a power balance between nearby H-bridge inverter units in response to this issue.A better modulation approach is also described to achieve soft switching of VB.I.