US 2026/0196945 A1 · POWER CONVERSION DEVICE

Abstract

A power conversion device includes a power converter and a control device. The control device includes: a DC voltage control unit to generate an active power command value based on a DC voltage command value and a DC voltage of a power storage element; a power generator simulation unit to simulate characteristics of a synchronous power generator based on the active power command value and active power of a power system, to generate a first angular frequency; a feedforward control unit to perform feedforward computation on the active power command value, to generate a feedforward command value; a phase generation unit to generate a reference phase o of the power converter, based on the first angular frequency and the feedforward command value; and a signal generation unit to generate a control signal for the power converter, based on the reference phase and a reference voltage command value.

Claims19

Dependent claims

A power conversion device comprising:

a power converter to perform power conversion between a power storage element and a power system;
and
a control device to control the power converter,
the power converter converting DC power outputted from the power storage element into AC power, and outputting the AC power to the power system,
the control device including
processing circuitry
to generate an active power command value for the power converter, based on a DC voltage command value and a DC voltage of the power storage element,
to simulate characteristics of a synchronous power generator based on the active power command value and active power of the power system, to generate a first angular frequency,
to perform feedforward computation on the active power command value, to generate a feedforward command value,
to generate a reference phase of an output voltage of the power converter, based on the first angular frequency and the feedforward command value, and
to generate a control signal for the power converter, based on the reference phase and a reference voltage command value for the output voltage of the power converter.

8 more elements

A power conversion device comprising:

a power converter to perform power conversion between a power storage element and a power system;
and
a control device to control the power converter,
the power converter converting DC power outputted from the power storage element into AC power, and outputting the AC power to the power system,
the control device including
processing circuitry
to generate an active power command value for the power converter, based on a DC voltage command value and a DC voltage of the power storage element,
to simulate characteristics of a synchronous power generator based on the active power command value and active power of the power system, to generate a first angular frequency,
to generate a reference phase of the power converter based on the first angular frequency,
a to perform feedforward computation on the active power command value, to generate a feedforward command value,
to generate a reference voltage command value for an output voltage of the power converter,
to calculate, based on a detection value of an output current from the power converter and the feedforward command value, a correction value for suppressing the output current to less than or equal to a current limit value, and to generate a voltage command value for the output voltage of the power converter using the correction value and the reference voltage command value for the output voltage of the power converter, and
a to generate a control signal for the power converter, based on the reference phase and the voltage command value.

10 more elements

Dependencies are inferred from the claim text.

Power conversion device

Life of this patent

Power conversion device

Life of this patent

Abstract

Claims19