Improved Direct Power Control for Grid-Connected Voltage Source Converters

Yonghao Gui; Chunghun Kim; Chung Choo Chung; Josep M. Guerrero; Yajuan Guan; Juan C. Vasquez

doi:10.1109/TIE.2018.2801835

Improved Direct Power Control for Grid-Connected Voltage Source Converters

Yonghao Gui, Chunghun Kim, Chung Choo Chung, Josep M. Guerrero, Yajuan Guan, Juan C. Vasquez

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

118 Scopus citations

Abstract

A novel grid voltage modulated direct power control (GVM-DPC) strategy for a grid-connected voltage source converter is proposed to control the instantaneous active and reactive powers directly. The GVM-DPC method consists of a nonlinear GVM controller, a conventional controller (feedforward and PI feedback), and nonlinear damping. The proposed control strategy shows a relationship between DPC and voltage-oriented control methods designed in d-q frame. The main advantage is that the proposed method makes the system be a linear time-invariant system, which enables us to apply various control methods easily. The GVM-DPC guarantees not only the convergence rate but also the steady-state performance of the system. Moreover, it is ensured that the closed-loop system is exponentially stable. Finally, simulation and experimental results using a 2.2-kVA VSC are provided to validate the tracking performance and robustness of the proposed control architecture. In addition, the total harmonic distortion of the current is 1.9\% which is much less than the requirement for grid operation.

Original language	English
Pages (from-to)	8041-8051
Number of pages	11
Journal	IEEE Transactions on Industrial Electronics
Volume	65
Issue number	10
DOIs	https://doi.org/10.1109/TIE.2018.2801835
State	Published - Oct 2018
Externally published	Yes

Funding

Manuscript received August 18, 2017; revised November 30, 2017; accepted January 14, 2018. Date of publication February 14, 2018; date of current version June 1, 2018. This work was supported by the Korea Electric Power Corporation under Grant R17XA05-56. (Corresponding author: Yonghao Gui.) Y. Gui was with the Department of Electrical Engineering, Hanyang University, Seoul 133-791, South Korea, and is also with the Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark (e-mail: [email protected]).

Funders	Funder number
Korea Electric Power Corporation	R17XA05-56

Keywords

DC-AC power converters
direct power control (DPC)
exponentially stable
linear time-invariant (LTI) system

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10.1109/TIE.2018.2801835

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title = "Improved Direct Power Control for Grid-Connected Voltage Source Converters",

abstract = "A novel grid voltage modulated direct power control (GVM-DPC) strategy for a grid-connected voltage source converter is proposed to control the instantaneous active and reactive powers directly. The GVM-DPC method consists of a nonlinear GVM controller, a conventional controller (feedforward and PI feedback), and nonlinear damping. The proposed control strategy shows a relationship between DPC and voltage-oriented control methods designed in d-q frame. The main advantage is that the proposed method makes the system be a linear time-invariant system, which enables us to apply various control methods easily. The GVM-DPC guarantees not only the convergence rate but also the steady-state performance of the system. Moreover, it is ensured that the closed-loop system is exponentially stable. Finally, simulation and experimental results using a 2.2-kVA VSC are provided to validate the tracking performance and robustness of the proposed control architecture. In addition, the total harmonic distortion of the current is 1.9\% which is much less than the requirement for grid operation.",

keywords = "DC-AC power converters, direct power control (DPC), exponentially stable, linear time-invariant (LTI) system",

author = "Yonghao Gui and Chunghun Kim and Chung, {Chung Choo} and Guerrero, {Josep M.} and Yajuan Guan and Vasquez, {Juan C.}",

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year = "2018",

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AU - Chung, Chung Choo

AU - Guerrero, Josep M.

AU - Guan, Yajuan

AU - Vasquez, Juan C.

PY - 2018/10

Y1 - 2018/10

N2 - A novel grid voltage modulated direct power control (GVM-DPC) strategy for a grid-connected voltage source converter is proposed to control the instantaneous active and reactive powers directly. The GVM-DPC method consists of a nonlinear GVM controller, a conventional controller (feedforward and PI feedback), and nonlinear damping. The proposed control strategy shows a relationship between DPC and voltage-oriented control methods designed in d-q frame. The main advantage is that the proposed method makes the system be a linear time-invariant system, which enables us to apply various control methods easily. The GVM-DPC guarantees not only the convergence rate but also the steady-state performance of the system. Moreover, it is ensured that the closed-loop system is exponentially stable. Finally, simulation and experimental results using a 2.2-kVA VSC are provided to validate the tracking performance and robustness of the proposed control architecture. In addition, the total harmonic distortion of the current is 1.9\% which is much less than the requirement for grid operation.

AB - A novel grid voltage modulated direct power control (GVM-DPC) strategy for a grid-connected voltage source converter is proposed to control the instantaneous active and reactive powers directly. The GVM-DPC method consists of a nonlinear GVM controller, a conventional controller (feedforward and PI feedback), and nonlinear damping. The proposed control strategy shows a relationship between DPC and voltage-oriented control methods designed in d-q frame. The main advantage is that the proposed method makes the system be a linear time-invariant system, which enables us to apply various control methods easily. The GVM-DPC guarantees not only the convergence rate but also the steady-state performance of the system. Moreover, it is ensured that the closed-loop system is exponentially stable. Finally, simulation and experimental results using a 2.2-kVA VSC are provided to validate the tracking performance and robustness of the proposed control architecture. In addition, the total harmonic distortion of the current is 1.9\% which is much less than the requirement for grid operation.

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Improved Direct Power Control for Grid-Connected Voltage Source Converters

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