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Impact of the Intermittency of Photovoltaic Power Plants on the Frequency Management: Case of the Senegalese Electricity Grid

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Document pages: 16 pages

Abstract: Thispaper investigates the impact of the intermittency of the photovoltaic (PV)power plants on the electric grid frequency management and the consequencesthat can occur. To meet these purposes, three years data of the Senegalese gridfrequency are used, combined with three PV power plants data since theirstarting-up. Using these data, we analyzed two days of heavily disturbedoperation of the Senegalese grid in order to emphasize the real impact of thepresence of PV power plants on the electrical grid. Our study has highlighted that how theintermittency of photovoltaic power plants affects frequency management. Itobviously appears that the PV production curves follow the irradiationvariations. Instantaneous variations of PV production make it difficult tomanage the grid frequency leading to more frequent load shedding as we haveshown with the data after the commissioning of the PV power plants. We alsoestimate the power then energy losses during the load shedding induced by thePV integration on the power grid by comparing a period corresponding to onemonth before (February 2017) and one month after (February 2018) theintegration of variable PV production.

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