THREE-LEVEL POWER CONVERSION DEVICE - TOSHIBA MITSUBISHI ELEC INC

Title:

THREE-LEVEL POWER CONVERSION DEVICE

Document Type and Number:

WIPO Patent Application WO/2013/105427

Kind Code:

A1

Abstract:

Provided is a three-level power conversion device that can suppress fluctuation of a neutral-point potential even when operated as a reactive power regulator. The three-level power conversion device is connected to an AC power source system and comprises: first and second three-level converters (2A, 2B); positive side and negative side DC capacitors (3P, 3N); a three-level inverter (4) that drives an AC motor (5); and a converter control means (10) that controls the three-level converters (2A, 2B). The converter control means (10) comprises: first and second reactive current control means (15A, 15B) that carry out control in such a way that each of the reactive components of input currents of the three-level converters (2A, 2B) become a predetermined reactive current reference; first and second neutral-point potential fluctuation suppression means that control PWM control means (17A, 17B) in such a way that the difference in voltage applied to the DC capacitors (3P, 3N) becomes zero; and an active current control means that passes a predetermined circulating active current from the three-level converter (2A) to the three-level converter (2B).

Inventors:

ODA KENJI
FUKUMA KATSUHIKO

Application Number:

PCT/JP2012/083416

Publication Date:

July 18, 2013

Filing Date:

December 25, 2012

Export Citation:

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Assignee:

TOSHIBA MITSUBISHI ELEC INC (JP)

International Classes:

H02M7/12; H02M7/48; H02M7/487

Foreign References:

JP2003070263A	2003-03-07
JPH0965658A	1997-03-07
JPH09172783A	1997-06-30
JPH0965658A	1997-03-07

Other References: