SWITCHING COORDINATION OF DISTRIBUTED DC-DC CONVERTERS FOR HIGHLY EFFICIENT PHOTOVOLTAIC POWER PLANTS

摘要

PROBLEM TO BE SOLVED: To provide a system and method for coordinating the switching of distributed dc-dc converters associated with PV modules to yield highly efficient photovoltaic power plants.SOLUTION: 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 on the basis of the total system power available from one or more corresponding strings of PV modules. Because of 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.