Author to whom correspondence should be addressed. This paper presents a low-voltage ride-through (LVRT) control strategy for grid-connected energy storage systems (ESSs). In the past, researchers have investigated the LVRT control strategies to apply them to wind power generation (WPG) and solar energy generation (SEG) systems.
Energy storage systems, and in particular batteries, are emerging as one of the potential solutions to increase system flexibility, due to their unique capability to quickly absorb, hold and then reinject electricity.
Therefore, energy storage systems (ESSs) are used for conserving energy generated by the renewable energy sources in battery systems. The grid-connected ESS usually generates and supplies power by connecting to a grid. It is used for conserving the additional energy with a reasonable cost, such as at night.
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New modulation techniques for a leakage current reduction and a neutral-point voltage balance in transformerless photovoltaic systems using a three-level inverter. IEEE Trans. Power Electron. 2014, 29, 1720–1732. [ Google Scholar] [ CrossRef] Espi, J.M.; Castello, J. Wind turbine generation system with optimized DC-link design and control.
In general, the grid-code regulations define that systems such as WPG and SEG have to remain connected to the grid when the voltage drops for a specified time and support the grid with a reactive current. This requirement, known as a low-voltage ride-through (LVRT), is needed to avoid grid blackouts.