Power conversion system including plurality of power converters connected in parallel to load
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United States of America Patent
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Oct 3, 2017
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N/A
app pub date -
Jan 19, 2016
filing date -
Jul 8, 2015
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Abstract
An uninterruptible power supply system includes a plurality of uninterruptible power supply devices, and each uninterruptible power supply device includes a conversion circuit, an inversion circuit, a DC positive bus, a DC negative bus, and a capacitor. The uninterruptible power supply system includes a first wiring connected between DC positive buses of two uninterruptible power supply devices, and a second wiring connected between DC negative buses of the two uninterruptible power supply devices. The operation of all uninterruptible power supply devices is stopped in response to an absolute value of a current flowing through a bundle of the first and second wirings exceeding an upper limit value.
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