US 2026/0254366 A1Published application

Power conversion device

AssigneeMitsubishi Electric Corporation

InventorsTakato TOI, Kaho MUKUNOKI, Masayuki OISHI

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Abstract

A power conversion device includes a power converter and a control device. The control device includes: an active power control unit to generate a reference phase, based on an active power detection value and an active power command value; a capacitor voltage control unit to generate a reference phase correction value, based on a capacitor voltage command value and a voltage of a capacitor; a voltage command generation unit to generate a voltage command value for controlling first active power transmitted and received between a DC circuit and the power converter and controlling second active power transmitted and received between an AC system and the power converter, based on an output DC current, a DC current command value, a reference voltage command value, the reference phase, and the reference phase correction value; and a signal generation unit to generate a control signal based on the voltage command value.

Claims20

Dependent claims

A power conversion device comprising:

a power converter to perform power conversion between an AC system and a DC circuit;
and
a control device to control the power converter,
the control device including
processing circuitry
to generate a reference phase of an output AC voltage of the power converter, based on an active power detection value of the AC system, an active power command value, and a system angular frequency of the AC system,
a to generate a reference phase correction value for correcting the reference phase, based on a capacitor voltage command value and a voltage of a capacitor included in the power converter,
to generate a voltage command value for controlling first active power transmitted and received between the DC circuit and the power converter and controlling second active power transmitted and received between the AC system and the power converter, based on an output DC current of the power converter, a DC current command value, a reference voltage command value of the output AC voltage of the power converter, the reference phase, and the reference phase correction value, and
to generate a control signal for the power converter based on the voltage command value.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/162,415Filed 16 Mar 2023
Published: 27 Aug 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H02M 7/219
Using semiconductor devices only: in a bridge configuration
H02J 4/25
Networks integrating separated AC and DC power sections: for transfer of electric power between AC and DC networks, e.g. for supplying the DC…
H02M 1/0009
Details of control, feedback or regulation circuits: devices or circuits for detecting current in a converter
H02M 1/0025
Details of control, feedback or regulation circuits: arrangements for modifying reference values, feedback values or error values in the control…