Average and Phasor Models of Single Phase PV Generators for Analysis and Simulation of Large Power Distribution Systems

As the penetration of distributed PV generation increases, its impact on the stability and security of the power system will become more and more significant. Suitable models for the PV generators are needed for studying the dynamics in a power system containing many such distributed PV generators. In this paper, two dynamic models for residential single phase PV converters are developed for fast simulation of power distribution systems with multiple PV generators: a simplified average model and a phasor model. The former is useful for time-domain simulation. The latter is suitable for fast phasor simulation where only the magnitudes and phases at the line frequency of the voltages and currents in the power system network are of interest. Simulations are conducted to show the improved simulation speed and to validate the accuracy of the developed models.