Impedance Analysis of Voltage Source Converter Using Direct Power Control

Shuning Gao; Haoran Zhao; Yonghao Gui; Jia Luo; Frede Blaabjerg

doi:10.1109/TEC.2020.3020181

Impedance Analysis of Voltage Source Converter Using Direct Power Control

Shuning Gao, Haoran Zhao, Yonghao Gui, Jia Luo, Frede Blaabjerg

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

23 Scopus citations

Abstract

The impedance analysis has been proposed and proved to be an effective way to analyze the grid-connected stability of Voltage Source Converter (VSC) based energy conversion systems. Most of the existing impedance analyzes are discussed based on vector oriented control, while there are few discussions about the impedance analysis of Direct Power Control (DPC). In this paper, an impedance modeling approach of VSC using the DPC is firstly proposed and analyzed, which fills the gap of impedance analysis of the DPC based converters and provides a basis for studying the corresponding grid-integration stability problems. Since there is no need for PLL and Park transformation, the impedance matrix is built directly using the α β reference frame and features symmetrical characteristics. The proposed impedance matrix can be transformed into a positive-sequence impedance and analyzed by using SISO Nyquist criteria. The stability of a weak-grid connected VSC using DPC is analyzed in this article. The main factors affecting system stability, including the grid and control parameters, are considered in the analysis. The effectiveness of the proposed method is demonstrated by the simulations carried out in the Matlab/Simulink Simscape Power Systems as well as a hardware-in-loop system.

Original language	English
Article number	9179995
Pages (from-to)	831-840
Number of pages	10
Journal	IEEE Transactions on Energy Conversion
Volume	36
Issue number	2
DOIs	https://doi.org/10.1109/TEC.2020.3020181
State	Published - Jun 2021
Externally published	Yes

Funding

Manuscript received January 22, 2020; revised May 28, 2020; accepted August 10, 2020. Date of publication August 28, 2020; date of current version May 21, 2021. The authors would like to thank the National Key R&D Program of China (2018YFB0904004) for the financial support. Paper no. TEC-00087-2020. (Corresponding author: Haoran Zhao.) Shuning Gao is with the School of Electrical Engineering, Shandong University, Jinan 250061, China, and also with the Automation & Control Section at the Department of Electronic Systems, Aalborg University, 9220 Aalborg, Denmark (e-mail: [email protected]).

Keywords

Direct power control (DPC)
impedance model
stability
voltage source converter
weak grid

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1109/TEC.2020.3020181

Cite this

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title = "Impedance Analysis of Voltage Source Converter Using Direct Power Control",

abstract = "The impedance analysis has been proposed and proved to be an effective way to analyze the grid-connected stability of Voltage Source Converter (VSC) based energy conversion systems. Most of the existing impedance analyzes are discussed based on vector oriented control, while there are few discussions about the impedance analysis of Direct Power Control (DPC). In this paper, an impedance modeling approach of VSC using the DPC is firstly proposed and analyzed, which fills the gap of impedance analysis of the DPC based converters and provides a basis for studying the corresponding grid-integration stability problems. Since there is no need for PLL and Park transformation, the impedance matrix is built directly using the α β reference frame and features symmetrical characteristics. The proposed impedance matrix can be transformed into a positive-sequence impedance and analyzed by using SISO Nyquist criteria. The stability of a weak-grid connected VSC using DPC is analyzed in this article. The main factors affecting system stability, including the grid and control parameters, are considered in the analysis. The effectiveness of the proposed method is demonstrated by the simulations carried out in the Matlab/Simulink Simscape Power Systems as well as a hardware-in-loop system.",

keywords = "Direct power control (DPC), impedance model, stability, voltage source converter, weak grid",

author = "Shuning Gao and Haoran Zhao and Yonghao Gui and Jia Luo and Frede Blaabjerg",

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AU - Zhao, Haoran

AU - Gui, Yonghao

AU - Luo, Jia

AU - Blaabjerg, Frede

PY - 2021/6

Y1 - 2021/6

N2 - The impedance analysis has been proposed and proved to be an effective way to analyze the grid-connected stability of Voltage Source Converter (VSC) based energy conversion systems. Most of the existing impedance analyzes are discussed based on vector oriented control, while there are few discussions about the impedance analysis of Direct Power Control (DPC). In this paper, an impedance modeling approach of VSC using the DPC is firstly proposed and analyzed, which fills the gap of impedance analysis of the DPC based converters and provides a basis for studying the corresponding grid-integration stability problems. Since there is no need for PLL and Park transformation, the impedance matrix is built directly using the α β reference frame and features symmetrical characteristics. The proposed impedance matrix can be transformed into a positive-sequence impedance and analyzed by using SISO Nyquist criteria. The stability of a weak-grid connected VSC using DPC is analyzed in this article. The main factors affecting system stability, including the grid and control parameters, are considered in the analysis. The effectiveness of the proposed method is demonstrated by the simulations carried out in the Matlab/Simulink Simscape Power Systems as well as a hardware-in-loop system.

AB - The impedance analysis has been proposed and proved to be an effective way to analyze the grid-connected stability of Voltage Source Converter (VSC) based energy conversion systems. Most of the existing impedance analyzes are discussed based on vector oriented control, while there are few discussions about the impedance analysis of Direct Power Control (DPC). In this paper, an impedance modeling approach of VSC using the DPC is firstly proposed and analyzed, which fills the gap of impedance analysis of the DPC based converters and provides a basis for studying the corresponding grid-integration stability problems. Since there is no need for PLL and Park transformation, the impedance matrix is built directly using the α β reference frame and features symmetrical characteristics. The proposed impedance matrix can be transformed into a positive-sequence impedance and analyzed by using SISO Nyquist criteria. The stability of a weak-grid connected VSC using DPC is analyzed in this article. The main factors affecting system stability, including the grid and control parameters, are considered in the analysis. The effectiveness of the proposed method is demonstrated by the simulations carried out in the Matlab/Simulink Simscape Power Systems as well as a hardware-in-loop system.

KW - Direct power control (DPC)

KW - impedance model

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KW - voltage source converter

KW - weak grid

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Impedance Analysis of Voltage Source Converter Using Direct Power Control

Abstract

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Keywords

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