The contribution of solar energy generation assets to the French electrical grid is fast growing. Because the weather isintrinsically fluctuating and chaotic and photovoltaic production is obviously connected to weather conditions, thesupply of photovoltaic energy is fluctuating and chaotic as well. But the electrical grid must be balanced at any time.To control the solar energy penetration into the network while keeping it balanced, photovoltaic production patternmust be anticipated [1, 2]. That is how weather forecasts become very helpful to manage solar plants. Photovoltaic isactually exempt from establishing a production guideline within French rules (unlike other energy plants), so as tosupport the growing of renewable energy. However, when the percentage of unforeseeable energy exceeds athreshold of 30% on a network, the energy administrator is allowed to disconnect a producer without any financialcompensation. Such a threshold is actually frequently reached in several French insular departments and territories(French Caribbean islands, Réunion, Corse, …). Unfortunately, this threshold will not promote investments inphotovoltaic plants.Our Vision - Lately, wind farms are asked to provide a production guideline as any other energy producer. Webelieve that, sooner or later, a similar rule will be applied on solar farms, which will allow the removal of thethreshold on the share of unpredictable energy injected on the network. Otherwise, there is no doubt that a tool toforecast the production will help photovoltaic producers and network managers.
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