Impact of Renewable Sources on the Power System Frequency
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Abstract
Aiming to reduce the negative impact on the environment caused by the use of fossil fuels for electricity generation, the electric industry worldwide is incorporating renewable sources, mainly wind and photovoltaic power plants, to satisfy the natural increase on the electricity demand and as a replacement of synchronous generating sources. As a result, of this massive incorporation of wind and photovoltaic power plants, the power systems are becoming less robust due to the null rotational inertia contribution to the system by these type of sources. Thus, the frequency in nowadays power systems is more sensitive to the contingencies that usually occur during the daily operation of the system. This paper reports the impact on the system’s frequency due to a loss of generation when photovoltaic power plants replace synchronous generation power plants. The results show clearly how the replacement of synchronous generation by photovoltaic power plants results in a higher frequency drop.
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