POWER CONVERSION DEVICE

WIPO Patent Application WO/2018/211949

A1

The invention addresses the problem that when a system accident point occurs on the primary side of an interconnection transformer, since the delayed following of secondary side voltage (output voltage of a power conversion device) occurs, it is necessary to further improve responsiveness and suppress overcurrent as small as possible. Provided is a power converter having an inverter connected through an LC filter to a system and an inverter control unit for controlling the inverter, wherein the control performed by the inverter control unit includes a control in which: a transient variation current suppression voltage estimation value that is a voltage deviation during a system accident is estimated on the basis of the inverter output current obtained by a plurality of samplings within a calculation cycle and the interconnection point voltage at an inverter interconnection point; and a voltage command is created by adding, as a feedforward, the transient variation current suppression voltage estimation value to a signal for controlling the current flowing through the inverter and is used as a PWM voltage command for the inverter.

JPH0295172	UNINTERRUPTIBLE POWER SUPPLY
JPS5329529	APPARATUS FOR GENERATING HIGH AC VOLTAGE
WO/2018/180328	ELECTRIC MOTOR CONTROL DEVICE

TAKEMOTO YOSHITAKA (JP)
ITO TOMOMICHI (JP)
ICHINOSE MASAYA (JP)
NEMOTO HARUO (JP)
TANIGUCHI MASAHIRO (JP)
ABE YUSUKE (JP)

PCT/JP2018/017245

November 22, 2018

April 27, 2018

Click for automatic bibliography generation  

HITACHI LTD (JP)

H02M7/48

JPH07123726A	1995-05-12
JP2002238163A	2002-08-23
JP2016032426A	2016-03-07
JP2004153957A	2004-05-27

TODA Yuji (JP)

View/Download PDF      PDF Help

Previous Patent: OBJECT DETECTION DEVICE, IN-VEHICLE RADAR SYSTEM, MONITORING RADAR SYSTEM, OBJECT DETECTION METHOD O...

Next Patent: COAXIAL CONNECTOR AND COAXIAL CONNECTOR MOUNTED SUBSTRATE