Capacitors Voltage Ripple Complementary Control on Three-Level Boost Fed Single-Phase VSI with Enhanced Power Decoupling Capability

Yan Zhang; Yanfei Huang; Peng Fang; Xiaoyang Gao; Yue Yang; Jinjun Liu

doi:10.1109/tpel.2021.3072869

Capacitors Voltage Ripple Complementary Control on Three-Level Boost Fed Single-Phase VSI with Enhanced Power Decoupling Capability

Yan Zhang, Yanfei Huang, Peng Fang, Xiaoyang Gao, Yue Yang, Jinjun Liu

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Power decoupling is always a strong desire for single-phase voltage source inverter (VSI) due to the inherent double-line (2ω) frequency ripple caused by the instantaneous power unbalance between dc- and ac-side. The existing solutions either apply a large capacitor or employ a small power converter to compensate it, which inevitably increases the system cost and control complexity. To overcome these drawbacks, this article performs the transient modeling analysis and it reveals that 2ω frequency power component in the converter achieves minimum value when the inductor current ripple is minimized. A novel capacitors' voltage ripple complementary control algorithm based on three-level boost fed single-phase VSI is proposed. By mitigating the 2ω power component from the inductor and redistributing the stored energy between two intermediate series-connected capacitors, the oscillating power is absorbed with notably eliminated input current ripple and significantly reduced dc-link voltage ripple. Thus, the good power quality of both dc- and ac-side is guaranteed. Furthermore, the total capacitance requirement is minimized under the given dc-link ripple tolerance without any more electric stress increment and lifetime reduction. Simulation and experiment results verify the theoretical analysis and proposed control method. It is promising in applications, where both input current ripple is strictly limited and ac output voltage quality is highly required with small dc-link capacitance.

Original language	English (US)
Article number	9403997
Pages (from-to)	14220-14236
Number of pages	17
Journal	IEEE Transactions on Power Electronics
Volume	36
Issue number	12
DOIs	https://doi.org/10.1109/tpel.2021.3072869
State	Published - Dec 2021
Externally published	Yes

Bibliographical note

Funding Information:
Manuscript received October 7, 2020; revised February 9, 2021 and March 27, 2021; accepted April 7, 2021. Date of publication April 13, 2021; date of current version August 16, 2021. This work was supported in part by the National Natural Science Foundation of China under Grant 51807152 and in part by the State Key Laboratory of Electrical Insulation and Power Equipment. Recommended for publication by Associate Editor J. Acero. (Corresponding authors: Yan Zhang; Jinjun Liu.) The authors are with the State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China (e-mail: [email protected]; [email protected]).

Publisher Copyright:
© 1986-2012 IEEE.

Keywords

Capacitors
Frequency control
Fuel cells
Inductors
Inverters
Switches
Voltage control
power decoupling
three-level dc-dc converter
DC-AC power converter
low-frequency ripple suppression

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10.1109/tpel.2021.3072869

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title = "Capacitors Voltage Ripple Complementary Control on Three-Level Boost Fed Single-Phase VSI with Enhanced Power Decoupling Capability",

abstract = "Power decoupling is always a strong desire for single-phase voltage source inverter (VSI) due to the inherent double-line (2ω) frequency ripple caused by the instantaneous power unbalance between dc- and ac-side. The existing solutions either apply a large capacitor or employ a small power converter to compensate it, which inevitably increases the system cost and control complexity. To overcome these drawbacks, this article performs the transient modeling analysis and it reveals that 2ω frequency power component in the converter achieves minimum value when the inductor current ripple is minimized. A novel capacitors' voltage ripple complementary control algorithm based on three-level boost fed single-phase VSI is proposed. By mitigating the 2ω power component from the inductor and redistributing the stored energy between two intermediate series-connected capacitors, the oscillating power is absorbed with notably eliminated input current ripple and significantly reduced dc-link voltage ripple. Thus, the good power quality of both dc- and ac-side is guaranteed. Furthermore, the total capacitance requirement is minimized under the given dc-link ripple tolerance without any more electric stress increment and lifetime reduction. Simulation and experiment results verify the theoretical analysis and proposed control method. It is promising in applications, where both input current ripple is strictly limited and ac output voltage quality is highly required with small dc-link capacitance.",

keywords = "Capacitors, Frequency control, Fuel cells, Inductors, Inverters, Switches, Voltage control, power decoupling, three-level dc-dc converter, DC-AC power converter, low-frequency ripple suppression",

author = "Yan Zhang and Yanfei Huang and Peng Fang and Xiaoyang Gao and Yue Yang and Jinjun Liu",

note = "Funding Information: Manuscript received October 7, 2020; revised February 9, 2021 and March 27, 2021; accepted April 7, 2021. Date of publication April 13, 2021; date of current version August 16, 2021. This work was supported in part by the National Natural Science Foundation of China under Grant 51807152 and in part by the State Key Laboratory of Electrical Insulation and Power Equipment. Recommended for publication by Associate Editor J. Acero. (Corresponding authors: Yan Zhang; Jinjun Liu.) The authors are with the State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi{\textquoteright}an Jiaotong University, Xi{\textquoteright}an 710049, China (e-mail: [email protected]; [email protected]). Publisher Copyright: {\textcopyright} 1986-2012 IEEE.",

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language = "English (US)",

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AU - Liu, Jinjun

N1 - Funding Information: Manuscript received October 7, 2020; revised February 9, 2021 and March 27, 2021; accepted April 7, 2021. Date of publication April 13, 2021; date of current version August 16, 2021. This work was supported in part by the National Natural Science Foundation of China under Grant 51807152 and in part by the State Key Laboratory of Electrical Insulation and Power Equipment. Recommended for publication by Associate Editor J. Acero. (Corresponding authors: Yan Zhang; Jinjun Liu.) The authors are with the State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China (e-mail: [email protected]; [email protected]). Publisher Copyright: © 1986-2012 IEEE.

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N2 - Power decoupling is always a strong desire for single-phase voltage source inverter (VSI) due to the inherent double-line (2ω) frequency ripple caused by the instantaneous power unbalance between dc- and ac-side. The existing solutions either apply a large capacitor or employ a small power converter to compensate it, which inevitably increases the system cost and control complexity. To overcome these drawbacks, this article performs the transient modeling analysis and it reveals that 2ω frequency power component in the converter achieves minimum value when the inductor current ripple is minimized. A novel capacitors' voltage ripple complementary control algorithm based on three-level boost fed single-phase VSI is proposed. By mitigating the 2ω power component from the inductor and redistributing the stored energy between two intermediate series-connected capacitors, the oscillating power is absorbed with notably eliminated input current ripple and significantly reduced dc-link voltage ripple. Thus, the good power quality of both dc- and ac-side is guaranteed. Furthermore, the total capacitance requirement is minimized under the given dc-link ripple tolerance without any more electric stress increment and lifetime reduction. Simulation and experiment results verify the theoretical analysis and proposed control method. It is promising in applications, where both input current ripple is strictly limited and ac output voltage quality is highly required with small dc-link capacitance.

AB - Power decoupling is always a strong desire for single-phase voltage source inverter (VSI) due to the inherent double-line (2ω) frequency ripple caused by the instantaneous power unbalance between dc- and ac-side. The existing solutions either apply a large capacitor or employ a small power converter to compensate it, which inevitably increases the system cost and control complexity. To overcome these drawbacks, this article performs the transient modeling analysis and it reveals that 2ω frequency power component in the converter achieves minimum value when the inductor current ripple is minimized. A novel capacitors' voltage ripple complementary control algorithm based on three-level boost fed single-phase VSI is proposed. By mitigating the 2ω power component from the inductor and redistributing the stored energy between two intermediate series-connected capacitors, the oscillating power is absorbed with notably eliminated input current ripple and significantly reduced dc-link voltage ripple. Thus, the good power quality of both dc- and ac-side is guaranteed. Furthermore, the total capacitance requirement is minimized under the given dc-link ripple tolerance without any more electric stress increment and lifetime reduction. Simulation and experiment results verify the theoretical analysis and proposed control method. It is promising in applications, where both input current ripple is strictly limited and ac output voltage quality is highly required with small dc-link capacitance.

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KW - Inverters

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KW - three-level dc-dc converter

KW - DC-AC power converter

KW - low-frequency ripple suppression

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ER -

Capacitors Voltage Ripple Complementary Control on Three-Level Boost Fed Single-Phase VSI with Enhanced Power Decoupling Capability

Abstract

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