Equivalent linearized circuit of photovoltaic generator appropriate for implementation in electromagnetic transient software programs

In this paper, an equivalent linearized electrical circuit of a photovoltaic generator is developed appropriate for association with electromagnetic transient packages for power systems studies which are based on nodal analysis. The proposed technique is based on published and well-tested ipv-vpv equations which are used in an alternative mathematical manner. The application of Newton-Raphson algorithm on ipv-vpv equations leads to uncoupling of the ipv and vpv quantities in each time step of a digital simulation. This is represented by a current source in parallel with a conductance. The proposed equivalent circuit is a powerful tool for power engineers who are involved in PV systems modeling since one can develop a PV generator element in electromagnetic transient programs for PV power systems studies.