SimElectronics

Solar Power Converter

This example shows how to determine the efficiency of a single-stage solar converter. The model simulates one complete AC cycle for a specified level of solar irradiance and corresponding optimal DC voltage and AC RMS current. Using the example model elec_solar_characteristics, the optimal values have been determined as 342V DC and 20.05A AC for an irradiance of 1000W/m^2 and panel temperature of 20 degrees Celsius. Efficiency is determined in two independent ways. The first compares the ratio of AC power out to DC power in. The second calculates losses by component by making use of Simscape™ logging. The small difference in calculated efficiency value is due to differences between trapezoidal integration used by the script and the greater accuracy achieved by the Simulink® ode23t variable-step solver.