10th Photovoltaic Science Application and Technology (PVSAT-10), Loughborough, UK, pp. 225-228, April 2014
Photovoltaic-oriented nodal analysis (PVONA) is a software scheme containing a distributed electrical model and a simulation engine for high-resolution simulation of localised electrical properties of PV cells. The performance of the older version of PVONA is limited by the inefficiency of the direct numerical algorithm used in nodal analysis. In this paper, a modified distributed model structure and a parallelised sparse conjugate gradient algorithm are introduced to achieve fast spatially-resolved simulation for PV cells. By using the proposed approach, the simulation for a 1000×1000 subcell array can be completed within 15 minutes and a 100×100 simulation requires less than 2 seconds, showing evident benefits compared to the widely used modelling techniques using SPICE-derivatives.