POWER CONVERSION CONTROL DEVICE

Title:

POWER CONVERSION CONTROL DEVICE

Document Type and Number:

WIPO Patent Application WO/2015/194493

Kind Code:

A1

Abstract:

Disclosed is a power conversion control device whereby an attenuation coefficient of voltage fluctuation of a direct current link is maintained at a desired value, irrespective of the magnitude of an impedance on the power supply side. A voltage cycle calculation unit (311) acquires an oscillation cycle (τ) of an end-to-end voltage (VL). A power supply impedance estimation unit (312) obtains an estimation value (Z^) of a power supply impedance (Z) on the basis of the oscillation cycle (τ), an inductance (L), and a capacitance (C). A gain setting unit (313A) sets a control gain (k) on the basis of the estimation value (Z^), the inductance (L), the capacitance (C), and a desired attenuation coefficient command (ζz), and outputs the control gain. A multiplier (321) obtains a product (k∙VL) of the control gain (k) and the end-to-end voltage (VL). A subtractor (322) obtains a voltage control rate command (K*) by subtracting the product (k∙VL) from a command value (K**).

Inventors:

OHTA KEISUKE

Application Number:

PCT/JP2015/067126

Publication Date:

December 23, 2015

Filing Date:

June 15, 2015

Export Citation:

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Assignee:

DAIKIN IND LTD (JP)

International Classes:

H02M7/48; H02P27/06

Domestic Patent References:

WO2014050441A1

2014-04-03

Foreign References:

JP2007202378A	2007-08-09
JP2013085444A	2013-05-09

Other References: