Is solar power a viable option for off-grid power?

Thanks to recent technological advances, which have made large-scale electricity storage economically viable, a combination of solar generation and storage holds the promise of cheaper, greener, and more reliable off-grid power in the future.

Why do off-grid solar systems cost so much?

The reason is that such off-grid locations exhibit known, constant backup costs as they typically have only one type of generator as backup, no merit ordering, and no capacity or energy auctions. As a consequence, the value of solar is easy to compute and equal to the cost of the backup generation it replaces.

Should a battery-based energy storage system be used in an off-grid nanogrid?

A battery-based energy storage system (BESS) [ 6] is indispensable for compensating for the imbalances between generation and demand in an off-grid nanogrid [ 7, 8 ]. Nevertheless, a nanogrid employing a stand-alone BESS is very costly. Accordingly, studies focus on sharing generation and storage resources via transmission lines [ 9, 10, 11 ].

How does a DC-coupled storage system affect PV output?

DC-coupled system (right figure)—with shared 50-MW inverter—must shift storage output to lower-price periods to accommodate PV output. DC-coupled system value decreases by about 1% relative to independent PV + storage system. Impacts of DC tightly coupled storage systems are more significant.

Are nanogrids a viable solution for distributed photovoltaic (PV) generation?

Nanogrids provide viable solutions for accommodating an ultra-high penetration level of distributed photovoltaic (PV) generation [ 1, 2 ]. A PV-based nanogrid usually spreads out in a smaller geographic area and entails a smaller capacity.

What is rO approach in PV capacity planning?

The employed RO approach uses distribution-free bounded intervals to model uncertainties of PV generation and demands. It can control the robustness of the capacity planning results by flexibly adjusting the predefined uncertainty budgets.