14-01-2021 дата публикации
Номер: US20210010707A1
A power conversion device () is supplied with an electric power from an alternating current power source (). An active filter device (), which is a power source quality improvement unit, improves a quality of the alternating current power source (). A controller () limits an operation of the power conversion device () so that any one of a power-source electric power, a power-source current, and a power-source harmonic obtained when a failure detection unit () detects a failure of the active filter device () becomes less than or equal to a maximum value of a corresponding one of the power-source electric power, the power-source current, and the power-source harmonic, the maximum value being obtained when no failure has occurred in the active filter device (). 1. A power source quality management system comprising:{'b': 70', '70', '7', '70', '9', '9', '1, 'a load apparatus (A, B, , , A, B) that operates in response to a power-source electric power being supplied thereto from a power source ();'}{'b': 2', '8', '1', '1, 'a power source quality improvement unit (, ) that is connected to the power source () and improves a quality of the power source ();'}{'b': 4', '41', '2', '8, 'a failure determination unit (, ) that determines a presence or absence of a failure of the power source quality improvement unit (, ); and'}{'b': 37', '37', '37', '75', '95', '95', '70', '70', '7', '70', '9', '9', '4', '41', '2', '8', '2', '8, 'an operation limiting unit (A, B, , , A, B) that limits an operation of the load apparatus (A, B, , , A, B) so that when the failure determination unit (, ) determines that the power source quality improvement unit (, ) has failed, any one of the power-source electric power, a power-source current, and a power-source harmonic becomes less than or equal to a maximum value of a corresponding one of the power-source electric power, the power-source current, and the power-source harmonic, the maximum value being obtained when no failure has occurred in the ...
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