Does a network-related fault affect photovoltaic system integration in Tunisia?

Network- related faults like outage of photovoltaic farm event, three-phase short-circuit at a conventional bus, and voltage dip at the largest photovoltaic station have been considered. It is hoped that the results of the presented study would benefit Tunisian’s utility’s policies on integration of PV systems.

How many spvgs can a Tunisian grid support?

Conferring to the bifurcation diagram, the maximum capacity of SPVGs that can be supported and accepted by the Tunisian grid is 2185 MW. Abrupt disconnection of PV farms results in a frequency deviation of 48.825 Hz, and voltage drop 6% of the nominal voltage.

How is Tunisian's national electric network integrated with spvgps simulated?

Tunisian’s national electric network integrated with proposed SPVGPs has been simulated and tested on PSAT software platform (Milano, 2005). During the last two decades, PSAT has a history of establishing trends and standards for modeling, simulation, and analysis of power systems.

What are the worst-case scenarios for a PV system in Tunisia?

The performance of the system is analyzed in compliance with the Tunisian grid requirement codes. In this regard, worst-case scenarios have been considered. Initially, the transient response of the system has been tested for a sudden PV power loss, i.e. the case of disconnection of all PV farms.

What happens if a PV Grid does not interact with the grid?

As results during this period of time, loads demand is successfully satisfied without interaction with the grid. In other words, there is no power extracted from the grid; however, there is power injected to the grid in (b) because of the highest number of PV panels used in this case (66 modules).

What happens if a photovoltaic system is disconnected from the grid?

If most of photovoltaic (PV) systems are disconnected from the grid under such conditions, it leads to failure of large-scale power supply and thus unstable power system.