Switching coordination of distributed DC-DC converters for highly efficient photovoltaic power plants

摘要

A distributed photovoltaic (PV) power plant (50) includes a plurality of distributed dc-dc converters (54). The dc-dc converters (54) are configured to switch in coordination with one another such that at least one dc-dc converter (54) transfers power to a common dc-bus based upon the total system power available from one or more corresponding strings of PV modules. Due to the coordinated switching of the dc-dc converters (54), each dc-dc converter (54) transferring power to the common dc-bus continues to operate within its optimal efficiency range as well as to optimize the maximum power point tracking in order to increase the energy yield of the PV power plant (50).