Identification of photovoltaic power system based on sensitivity analysis

Based on transfer function of photovoltaic grid-connected inverter, parameter static sensitivity formula is deduced, and a preliminary comparison of sensitivity is obtained. Furthermore, parameter dynamic trajectory sensitivity analysis approach is utilized to assess difficulty and precision of parameter identification by employing different disturbance tests, such as sudden change in irradiance, power grid fault, and so on. Parameter sensitivity analysis of photovoltaic power system is performed, and a step identification strategy is proposed.