Reconfigurable multi-channel inverter, photovoltaic grid-connected system and inverter control method

Abstract

The invention discloses a reconfigurable multi-channel inverter, a photovoltaic grid-connected system and an inverter control method, relates to the technical field of photovoltaic power generation, and solves the problems of waste of hardware resources and low overall photoelectric conversion efficiency caused by failure of a whole hardware link due to faults of part of devices. The reconfigurable multi-path inverter comprises at least one group of DC-DC converters, a first switch tube and a second switch tube, the output ends of the DC-DC converters are connected to a DC-AC converter, and the first switch tube and the second switch tube are used for topology reconstruction. Therefore, when the inverter or the photovoltaic panel breaks down, the fault type can be judged through information such as integrated operational amplifier sampling and comparator protection reporting, corresponding switching tubes are controlled to be turned on to reconstruct internal topological connection of the inverter through the remaining intact hardware circuits, available hardware resources are fully utilized, electric energy is transmitted to a power grid to the maximum extent, and the power supply efficiency is improved. Therefore, the generated power is maximized.

Images