A NEW METHOD TO IDENTIFY OPTIMAL OPERATING POINT FOR PHOTOVOLTAIC POWER SYSTEMS BASED ON COMPLETELY MATHEMATICAL MODEL
Keywords:
Control loop, maximum power point, photovoltaic power system, power limit, power balance, voltage-power curve.Abstract
This paper proposes a method to identify the optimal operating point for a photovoltaic power system. With the information on the power's solar irradiance,
the temperature at P-N junction, and the generated power limit, an algorithm is proposed to calculate points on the voltage-power curve based on an utterly
mathematical model of the generation, iterative, and bisectional techniques. A control system using an average voltage control technique is represented to drive
the generation to one of the calculated points, including the maximum power point, left and right sides, to evaluate its response and identify the optimal
operating point. Simulation results in Matlab/Simulink showed that the optimal operating point is the maximum or right side point because these points can
help reduce power fluctuation and state perturbation. This study can be applied in systems limiting power interaction at buses with the presence of the
generation to ensure power balance for the whole system.
