METHOD FOR CONTROLLING MAXIMUM POWER OF SOLAR BATTERY

摘要

PROBLEM TO BE SOLVED: To quickly make a target operating voltage follow the maximum output operating voltage even if an amount of solar radiation reduces. SOLUTION: When varying the target operating voltage Vref by controlling a current command value, the target operating voltage Vrefk+1 is varied in response to a valueΔVrefk+1 obtained by dividing a difference between an output power Pok-1 , at the target operating voltage Vref determined last time and an output voltage Pok at the target operating voltage Vrefk-1 determined this time by the output Pok at the recent target operating voltage. As a result, a variation range becomes relatively small when varying the target operating voltage Vref as an output power Po approaches to the maximum power Pmax, the target operating voltage Vref can be quickly made to follow the maximum output operating voltage Vmax by suppressing variation of the target operating voltage Vref in the vicinity of the maximum power Pmax even if an amount of solar radiation reduces.