Power Decoupling Method for Voltage Source Inverters Using Grid Voltage Modulated Direct Power Control in Unbalanced System

Gong, Zhen; Liu, Chengxi; Gui, Yonghao; da Silva, Filipe Faria; Bak, Claus Leth

doi:10.1109/tpel.2022.3220436

Title: Power Decoupling Method for Voltage Source Inverters Using Grid Voltage Modulated Direct Power Control in Unbalanced System

Abstract

The grid voltage modulated direct power control (GVM-DPC) is a novel power regulation method for grid-connected voltage source inverters (VSI). However, interactions between real and reactive powers still exist in GVM-DPC under unbalanced grid voltage condition, which may deteriorate its transient performance. Here, this article proposes a power decoupling method for GVM-DPC-based VSI in unbalanced systems based on the dynamic feedforward power compensation strategy, which can reduce the coupling magnitudes of real and reactive powers in the transient stages. First, the power coupling mechanism of positive and negative sequence real and reactive powers of VSI under the unbalanced voltage condition is analyzed. Then, the power coupling magnitudes (PCM) are derived according to relationships among the positive sequence components of real power, reactive power and point of common coupling (PCC) voltages. Next, the PCM are compensated into the GVM-DPC for the better decoupling performance. Furthermore, a stability analysis of the proposed control system is studied based on the impedance model, and a comparison with the traditional power decoupling method based on virtual impedance is conducted to show the superiority of the proposed method. Finally, simulations, hardware-in-loop test and experiment are conducted to validate the effectiveness of the proposed method.

Authors:

^[1];

^[2];

^[3];

^[3]

Wuhan Univ. (China)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Aalborg Univ. (Denmark)

Publication Date:: Tue Nov 08 00:00:00 EST 2022

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Electricity (OE); National Science Foundation (NSF)

OSTI Identifier:: 1958375

Grant/Contract Number:: AC05-00OR22725; 52007133; U22B20100

Resource Type:: Accepted Manuscript

Journal Name:: IEEE Transactions on Power Electronics

Additional Journal Information:: Journal Volume: 38; Journal Issue: 3; Journal ID: ISSN 0885-8993

Publisher:: IEEE

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; grid-voltage-modulated direct power control; power decoupling; voltage source inverter; unbalanced system

Citation Formats


                    Gong, Zhen, Liu, Chengxi, Gui, Yonghao, da Silva, Filipe Faria, and Bak, Claus Leth. Power Decoupling Method for Voltage Source Inverters Using Grid Voltage Modulated Direct Power Control in Unbalanced System.  United States: N. p., 2022. 
Web.  doi:10.1109/tpel.2022.3220436.

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                    Gong, Zhen, Liu, Chengxi, Gui, Yonghao, da Silva, Filipe Faria, & Bak, Claus Leth. Power Decoupling Method for Voltage Source Inverters Using Grid Voltage Modulated Direct Power Control in Unbalanced System.  United States.  https://doi.org/10.1109/tpel.2022.3220436

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                    Gong, Zhen, Liu, Chengxi, Gui, Yonghao, da Silva, Filipe Faria, and Bak, Claus Leth. Tue .  
"Power Decoupling Method for Voltage Source Inverters Using Grid Voltage Modulated Direct Power Control in Unbalanced System".  United States.  https://doi.org/10.1109/tpel.2022.3220436.  https://www.osti.gov/servlets/purl/1958375.

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@article{osti_1958375,

  title        = {Power Decoupling Method for Voltage Source Inverters Using Grid Voltage Modulated Direct Power Control in Unbalanced System},

  author       = {Gong, Zhen and Liu, Chengxi and Gui, Yonghao and da Silva, Filipe Faria and Bak, Claus Leth},

  abstractNote = {The grid voltage modulated direct power control (GVM-DPC) is a novel power regulation method for grid-connected voltage source inverters (VSI). However, interactions between real and reactive powers still exist in GVM-DPC under unbalanced grid voltage condition, which may deteriorate its transient performance. Here, this article proposes a power decoupling method for GVM-DPC-based VSI in unbalanced systems based on the dynamic feedforward power compensation strategy, which can reduce the coupling magnitudes of real and reactive powers in the transient stages. First, the power coupling mechanism of positive and negative sequence real and reactive powers of VSI under the unbalanced voltage condition is analyzed. Then, the power coupling magnitudes (PCM) are derived according to relationships among the positive sequence components of real power, reactive power and point of common coupling (PCC) voltages. Next, the PCM are compensated into the GVM-DPC for the better decoupling performance. Furthermore, a stability analysis of the proposed control system is studied based on the impedance model, and a comparison with the traditional power decoupling method based on virtual impedance is conducted to show the superiority of the proposed method. Finally, simulations, hardware-in-loop test and experiment are conducted to validate the effectiveness of the proposed method.},

  doi          = {10.1109/tpel.2022.3220436},

  journal      = {IEEE Transactions on Power Electronics},

  number       = 3,

  volume       = 38,

  place        = {United States},

  year         = {Tue Nov 08 00:00:00 EST 2022},

  month        = {Tue Nov 08 00:00:00 EST 2022}

}

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Title: Power Decoupling Method for Voltage Source Inverters Using Grid Voltage Modulated Direct Power Control in Unbalanced System

Abstract

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