Impact of Power Grid Strength and PLL Parameters on Stability of Grid-Connected DFIG Wind Farm

Ju Liu, Wei Yao, Jinyu Wen, Jiakun Fang, L. Jiang, Haibo He, Shi-Jie Cheng

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

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Resumé

This paper investigates the impact of power grid strength and phase-locked loop (PLL) parameters on small signal stability of grid-connected doubly-fed induction generator (DFIG)-based wind farm. Modal analysis of the grid-connected DFIG wind turbine under different operating conditions and various power grid strengths are investigated at first. Modal analysis results reveal that the DFIG connected to a weak grid may easily lose stability under the heavy-duty operating conditions due to PLL oscillation. The object of this paper is to identify the PLL oscillation mechanism as well as influence factors and propose a damping solution for this oscillation mode. A simplified linear system model of the grid-connected DFIG wind turbine is proposed for analyzing the PLL oscillation. Through the complex torque coefficients method and using this model, the oscillation mechanism and influence factors including the power grid strength and the PLL parameters are identified. To suppress this PLL oscillation, a mixed H2/H∞ robust damping controller is proposed and designed for the DFIG. Electromagnetic transient simulation results of both single-DFIG system and multiply-DFIG system verify the correctness of the analysis results and effectiveness of the proposed damping controller.
OriginalsprogEngelsk
TidsskriftIEEE Transactions on Sustainable Energy
Vol/bind11
Udgave nummer1
Sider (fra-til)545 - 557
Antal sider13
ISSN1949-3029
DOI
StatusUdgivet - jan. 2020

Fingerprint

Asynchronous generators
Phase locked loops
Farms
Damping
Modal analysis
Wind turbines
Controllers
Linear systems
Torque

Emneord

  • Phase locked loops
  • Oscillators
  • Doubly fed induction generators
  • Wind farms
  • Wind turbines
  • Power system stability
  • Power grids
  • Doubly-fed induction generator (DFIG)
  • small signal stability
  • phase-locked loop (PLL)
  • power grid strength
  • damping controller

Citer dette

Liu, Ju ; Yao, Wei ; Wen, Jinyu ; Fang, Jiakun ; Jiang, L. ; He, Haibo ; Cheng, Shi-Jie. / Impact of Power Grid Strength and PLL Parameters on Stability of Grid-Connected DFIG Wind Farm. I: IEEE Transactions on Sustainable Energy. 2020 ; Bind 11, Nr. 1. s. 545 - 557.
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title = "Impact of Power Grid Strength and PLL Parameters on Stability of Grid-Connected DFIG Wind Farm",
abstract = "This paper investigates the impact of power grid strength and phase-locked loop (PLL) parameters on small signal stability of grid-connected doubly-fed induction generator (DFIG)-based wind farm. Modal analysis of the grid-connected DFIG wind turbine under different operating conditions and various power grid strengths are investigated at first. Modal analysis results reveal that the DFIG connected to a weak grid may easily lose stability under the heavy-duty operating conditions due to PLL oscillation. The object of this paper is to identify the PLL oscillation mechanism as well as influence factors and propose a damping solution for this oscillation mode. A simplified linear system model of the grid-connected DFIG wind turbine is proposed for analyzing the PLL oscillation. Through the complex torque coefficients method and using this model, the oscillation mechanism and influence factors including the power grid strength and the PLL parameters are identified. To suppress this PLL oscillation, a mixed H2/H∞ robust damping controller is proposed and designed for the DFIG. Electromagnetic transient simulation results of both single-DFIG system and multiply-DFIG system verify the correctness of the analysis results and effectiveness of the proposed damping controller.",
keywords = "Phase locked loops, Oscillators, Doubly fed induction generators, Wind farms, Wind turbines, Power system stability, Power grids, Doubly-fed induction generator (DFIG), small signal stability, phase-locked loop (PLL), power grid strength, damping controller, Doubly-fed induction generator (DFIG), Small signal stability, Phase-locked loop (PLL), Power grid strength, Damping controller",
author = "Ju Liu and Wei Yao and Jinyu Wen and Jiakun Fang and L. Jiang and Haibo He and Shi-Jie Cheng",
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doi = "10.1109/TSTE.2019.2897596",
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Impact of Power Grid Strength and PLL Parameters on Stability of Grid-Connected DFIG Wind Farm. / Liu, Ju; Yao, Wei; Wen, Jinyu; Fang, Jiakun; Jiang, L.; He, Haibo; Cheng, Shi-Jie.

I: IEEE Transactions on Sustainable Energy, Bind 11, Nr. 1, 01.2020, s. 545 - 557.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Impact of Power Grid Strength and PLL Parameters on Stability of Grid-Connected DFIG Wind Farm

AU - Liu, Ju

AU - Yao, Wei

AU - Wen, Jinyu

AU - Fang, Jiakun

AU - Jiang, L.

AU - He, Haibo

AU - Cheng, Shi-Jie

PY - 2020/1

Y1 - 2020/1

N2 - This paper investigates the impact of power grid strength and phase-locked loop (PLL) parameters on small signal stability of grid-connected doubly-fed induction generator (DFIG)-based wind farm. Modal analysis of the grid-connected DFIG wind turbine under different operating conditions and various power grid strengths are investigated at first. Modal analysis results reveal that the DFIG connected to a weak grid may easily lose stability under the heavy-duty operating conditions due to PLL oscillation. The object of this paper is to identify the PLL oscillation mechanism as well as influence factors and propose a damping solution for this oscillation mode. A simplified linear system model of the grid-connected DFIG wind turbine is proposed for analyzing the PLL oscillation. Through the complex torque coefficients method and using this model, the oscillation mechanism and influence factors including the power grid strength and the PLL parameters are identified. To suppress this PLL oscillation, a mixed H2/H∞ robust damping controller is proposed and designed for the DFIG. Electromagnetic transient simulation results of both single-DFIG system and multiply-DFIG system verify the correctness of the analysis results and effectiveness of the proposed damping controller.

AB - This paper investigates the impact of power grid strength and phase-locked loop (PLL) parameters on small signal stability of grid-connected doubly-fed induction generator (DFIG)-based wind farm. Modal analysis of the grid-connected DFIG wind turbine under different operating conditions and various power grid strengths are investigated at first. Modal analysis results reveal that the DFIG connected to a weak grid may easily lose stability under the heavy-duty operating conditions due to PLL oscillation. The object of this paper is to identify the PLL oscillation mechanism as well as influence factors and propose a damping solution for this oscillation mode. A simplified linear system model of the grid-connected DFIG wind turbine is proposed for analyzing the PLL oscillation. Through the complex torque coefficients method and using this model, the oscillation mechanism and influence factors including the power grid strength and the PLL parameters are identified. To suppress this PLL oscillation, a mixed H2/H∞ robust damping controller is proposed and designed for the DFIG. Electromagnetic transient simulation results of both single-DFIG system and multiply-DFIG system verify the correctness of the analysis results and effectiveness of the proposed damping controller.

KW - Phase locked loops

KW - Oscillators

KW - Doubly fed induction generators

KW - Wind farms

KW - Wind turbines

KW - Power system stability

KW - Power grids

KW - Doubly-fed induction generator (DFIG)

KW - small signal stability

KW - phase-locked loop (PLL)

KW - power grid strength

KW - damping controller

KW - Doubly-fed induction generator (DFIG)

KW - Small signal stability

KW - Phase-locked loop (PLL)

KW - Power grid strength

KW - Damping controller

U2 - 10.1109/TSTE.2019.2897596

DO - 10.1109/TSTE.2019.2897596

M3 - Journal article

VL - 11

SP - 545

EP - 557

JO - I E E E Transactions on Sustainable Energy

JF - I E E E Transactions on Sustainable Energy

SN - 1949-3029

IS - 1

ER -