Rivera-Alamo, José R.

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    Evaluation of flywheel and battery systems for power smoothing of a photovoltaic plant into power grid
    (2018-05) Rivera-Alamo, José R.; Andrade-Rengifo, Fabio; College of Engineering; Ortiz Rivera, Eduardo I.; O’Neill Carrillo, Efrain; Colom Ustariz, Jose G.; Department of Electrical and Computer Engineering; Amador Dumois, Maria A
    The integration of renewable energy generation presents a great challenge in the energy management of an electrical system. The rapid variability in the production of energy from renewable resources, specifically solar, produces ramps that can cause instability in the electric system due to the inability of conventional generators to assimilate these rapid changes in a short period. As a result, the electric power company limits integration by renewable energy producers. The purpose of this research work is to compare the capabilities of a flywheel and battery for voltage regulation in the face of disturbances produced by a photovoltaic plant in the power grid. A ramp control strategy and a static synchronous compensating control (STATCOM) were used to evaluate the performance of both energy storage systems (ESS). The results showed that the flywheel has better performance than the battery thanks to its rapid capacity to absorb and supply energy at the same rate. Another important result is that the ramp control used makes a considerable contribution to the regulation of voltage, requiring less reactive power and injecting more active power to the network while maintaining the stability of the voltage at the point of common connection.