Circuit and procedure for max. power point regulation of DC source e.g. solar cell or fuel cell

摘要

A procedure for controlling the extreme values of voltage for a DC source (e.g. solar cell, lead-acid storage battery, fuel cell etc) with an internal resistance so as to obtain the maximum output power has the system excited from a state of rest by setting an output value at a working point with a non-zero load. The DC and AC components of voltage, current and power (or any two of these) at this point are evaluated. Several parameters which describe the static and dynamic properties of the working point are determined using a first-order polynomial and then a new output value is determined from these parameters and the old output value.