Design and Simulation of a PV System Operating in Grid-Connected and Stand-Alone Modes for Areas of Daily Grid Blackouts
Table 1
Operating modes of the system.
Mode #
S1
S2
Description
1
0
0
Grid cutoff, battery charging from the PV generator, load is supplied with power from the battery block.
2
1
0
Grid available, load supplied directly from the grid. Battery state of charge is low, the battery block is charged at the same time from the PV generator and the grid.
3
0
1
Grid available, battery charging from a PV generator and excess produced power injected into the grid and supplies the load.
4
1
1
This state is not suitable to be used in this system (not allowed).