Verfahren zum Kompensieren von Momentanen Stromausfällen in einem Mittelspannungswechselrichter und Mittelspannungswechselrichtersystem damit

Details

Veröffentlichungs-Nr.

EP3046238

Aktenzeichen

EP15203101

Anmeldetag

30. Dezember 2015

Veröffentlichung

3. Oktober 2018

Erteilung

3. Oktober 2018

Rechtsraum

EP

IPC

H02M1/32H02P1/02H02P23/07

Abstract

Disclosed is a method for compensating instantaneous power failure. The method includes determining whether an input voltage of a plurality of power cells is less than or equal to a first threshold voltage, decreasing, when the input voltage is less than or equal to the first threshold voltage, an output frequency of the inverter, determining whether a voltage of a direct current (DC) link is greater than or equal to a second threshold voltage, and increasing, when the voltage of the DC link is greater than or equal to the second threshold voltage, the output frequency of the inverter. According to the present disclosure, overvoltage trip may be prevented at the power restoration time and overcurrent trip caused by increase in the slip frequency may be prevented. Thereby, reliability of a medium inverter may be enhanced, and a continuous operation time increased compared to the conventional cases may be ensured.

Anmelder

Firma

LSIS Co., Ltd.

Land

🇰🇷 Südkorea

Fachgebiete