Apparatus of Controlling Uninterruptible Power Supply for Grid
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United States of America Patent
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Issued Date -
Jan 10, 2019
app pub date -
Jul 10, 2017
filing date -
Jul 10, 2017
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Abstract
An apparatus is provided for controlling uninterruptible power supply (UPS) for grid. It comprises a power bus; an energy storage system connected to the power bus; a load connected to the power bus; a renewable energy connected to the power bus; an extra generator connected to the power bus; a static switch connected to mains and the energy storage system; and a synchronizing switch connected to the extra generator. When the grid is turned from mains-connected to islanding or is already operated in an islanding mode owing to the failure of the energy storage system, the extra generator can be used as a voltage source. The stability and safety of the grid is enhanced. Furthermore, the voltage source can be put under the control of either the energy storage system or the extra generator according to requirements. Thus, stability and reliability of power supply for the grid are increased.
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