Why till now some countries do not use solar PV for peak load at day time, while they use gas turbine?
Dear M. Onsa,
The question is a bit more complex than simply replacing gas turbines by solar panels. The key is the dispatchability of the electricity produced and its proper integration into an existing grid.
At some point in the day (even during daylight), solar PV panels may have to be supplemented by other sources of electricity - often gas turbines. As such, the turbines are installed, and paid for. And the less they are used, the more expensive they turn out to be (degraded ROI). Moreover, increasing the PV penetration in a grid leads to new constraints that need to be tackled (see https://www.nrel.gov/docs/fy13osti/54742.pdf).
The installation of a significant amount of solar panels, while of course highly desirable, thus represents a significant step for any given country.
Let's say that this is a work in progress...
https://www.sciencedirect.com/search?qs=solar%20PV%20for%20peak%20load%20at%20day%20time&show=25&sortBy=relevance
In my country of Iraq despite the presence of high solar radiation, but the production of electricity through oil is cheaper than its production by solar cells
Thank you Lemarié and İbrahim
instead of considering the pay back period which has its sound comparison if the pay back period is short ( one to tow years). But the LCOE (Levelized Cost Of Energy) is used and which gives better values for PV project than the gas turbines.the LCOE reached $0.06/kWh. Increasing the PV penetration in a grid may be managed by using a controlled system.
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