Control and modulation of a family of bidirectional AC-DC converters with active power compensation

Hao Wu; Siu Chung Wong; Chi Kong Tse; Qianhong Chen

doi:10.1109/ECCE.2015.7309752

Control and modulation of a family of bidirectional AC-DC converters with active power compensation

Hao Wu, Siu Chung Wong, Chi Kong Tse, Qianhong Chen

The Hong Kong Polytechnic University

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

5 Citations (Scopus)

Abstract

In a single-phase grid-connected nanogrid system, a bidirectional AC-DC converter is usually required to transfer energy between the AC grid and a DC bus. However, a ripple power at twice the grid frequency may be injected from the AC grid into the DC bus if the ripple power is not properly compensated. In this paper, a family of bidirectional single-phase AC-DC three-phase-leg PWM converters for use in the nanogrid system is analyzed. The averaged DC power and the second-order AC power of the AC grid are actively decoupled. A proper AC voltage reference for AC power compensation is analyzed and selected for the charge storage capacitor for better efficiency. A generalized control structure is proposed for the family of converters. Applying modulation with extra zero-sequence voltage injection derived from the three-phase-leg PWM voltages, a significant reduction of the AC storage capacitance is achieved and the converter efficiency is also improved. Finally, the analysis is verified by simulations and experimental measurements.

Original language	English
Title of host publication	2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015
Publisher	IEEE
Pages	661-668
Number of pages	8
ISBN (Electronic)	9781467371506
DOIs	https://doi.org/10.1109/ECCE.2015.7309752
Publication status	Published - 27 Oct 2015
Event	7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015 - Palais des Congres de Montreal (Montreal Convention Centre), Montreal, Canada Duration: 20 Sept 2015 → 24 Sept 2015

Conference

Conference	7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015
Country/Territory	Canada
City	Montreal
Period	20/09/15 → 24/09/15

ASJC Scopus subject areas

Energy Engineering and Power Technology
Electrical and Electronic Engineering

More information

10.1109/ECCE.2015.7309752

Cite this

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title = "Control and modulation of a family of bidirectional AC-DC converters with active power compensation",

abstract = "In a single-phase grid-connected nanogrid system, a bidirectional AC-DC converter is usually required to transfer energy between the AC grid and a DC bus. However, a ripple power at twice the grid frequency may be injected from the AC grid into the DC bus if the ripple power is not properly compensated. In this paper, a family of bidirectional single-phase AC-DC three-phase-leg PWM converters for use in the nanogrid system is analyzed. The averaged DC power and the second-order AC power of the AC grid are actively decoupled. A proper AC voltage reference for AC power compensation is analyzed and selected for the charge storage capacitor for better efficiency. A generalized control structure is proposed for the family of converters. Applying modulation with extra zero-sequence voltage injection derived from the three-phase-leg PWM voltages, a significant reduction of the AC storage capacitance is achieved and the converter efficiency is also improved. Finally, the analysis is verified by simulations and experimental measurements.",

author = "Hao Wu and Wong, {Siu Chung} and Tse, {Chi Kong} and Qianhong Chen",

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Wu, H, Wong, SC, Tse, CK & Chen, Q 2015, Control and modulation of a family of bidirectional AC-DC converters with active power compensation. in 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015., 7309752, IEEE, pp. 661-668, 7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015, Montreal, Canada, 20/09/15. https://doi.org/10.1109/ECCE.2015.7309752

Control and modulation of a family of bidirectional AC-DC converters with active power compensation. / Wu, Hao; Wong, Siu Chung; Tse, Chi Kong et al.
2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015. IEEE, 2015. p. 661-668 7309752.

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

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AU - Wong, Siu Chung

AU - Tse, Chi Kong

AU - Chen, Qianhong

PY - 2015/10/27

Y1 - 2015/10/27

N2 - In a single-phase grid-connected nanogrid system, a bidirectional AC-DC converter is usually required to transfer energy between the AC grid and a DC bus. However, a ripple power at twice the grid frequency may be injected from the AC grid into the DC bus if the ripple power is not properly compensated. In this paper, a family of bidirectional single-phase AC-DC three-phase-leg PWM converters for use in the nanogrid system is analyzed. The averaged DC power and the second-order AC power of the AC grid are actively decoupled. A proper AC voltage reference for AC power compensation is analyzed and selected for the charge storage capacitor for better efficiency. A generalized control structure is proposed for the family of converters. Applying modulation with extra zero-sequence voltage injection derived from the three-phase-leg PWM voltages, a significant reduction of the AC storage capacitance is achieved and the converter efficiency is also improved. Finally, the analysis is verified by simulations and experimental measurements.

AB - In a single-phase grid-connected nanogrid system, a bidirectional AC-DC converter is usually required to transfer energy between the AC grid and a DC bus. However, a ripple power at twice the grid frequency may be injected from the AC grid into the DC bus if the ripple power is not properly compensated. In this paper, a family of bidirectional single-phase AC-DC three-phase-leg PWM converters for use in the nanogrid system is analyzed. The averaged DC power and the second-order AC power of the AC grid are actively decoupled. A proper AC voltage reference for AC power compensation is analyzed and selected for the charge storage capacitor for better efficiency. A generalized control structure is proposed for the family of converters. Applying modulation with extra zero-sequence voltage injection derived from the three-phase-leg PWM voltages, a significant reduction of the AC storage capacitance is achieved and the converter efficiency is also improved. Finally, the analysis is verified by simulations and experimental measurements.

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Control and modulation of a family of bidirectional AC-DC converters with active power compensation

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