5. Conclusions
The nonlinear system identification using Hammerstein and
Wiener model is the new method to modeling system of inverter
for photovoltaic system. This method does not need the power circuit,
power switching topology, type of control system and the specific
information to estimate the model. The modeling can imitate
behavior of system by black-box approach. The utilization of modeling
can simulate and predicted output waveform by take the input
or past input/output waveform to modeling. The mathematical
as the representation of the system can be analyzed in aspect of
control system, stability. The applications of modeling are widely
use for example model predictive control, electrical power system
impact analysis, etc.