A synchronization control technique for soft connection of doubly-fed induction generator based wind turbines to the power grid

Muttaqi, Kashem M.; Hagh, Mehrdad Tarafdar

doi:10.1109/ias.2017.8101767

Cited by 6 publications

(10 citation statements)

References 15 publications

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“…Stator voltage-oriented control and stator flux-oriented control (SFOC) are two prominent types of FOC, and they exhibit the same dynamic performance. However, few published studies explain the startup and synchronization process of a DFIG-based WECS with the grid [7,8,10,[15][16][17][18][19][20][21]. The authors of [7] presented an efficient control scheme for the grid synchronization of a DFIG.…”

Section: Literature Reviewmentioning

confidence: 99%

“…In [20], a new control strategy for designing the start-up procedure of a WT system equipped with DFIG was developed, in which a fuzzy logic controller was implemented to boost the system performance and reinforce the robustness under uncertain conditions. The authors of [21] proposed a direct voltage control-based synchronization technique for DFIG-based WTs.…”

Section: Literature Reviewmentioning

confidence: 99%

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LMI-Based State Feedback Control Structure for Resolving Grid Connectivity Issues in DFIG-Based WT Systems

Ali¹

2021

Eng

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Pertaining to the connectivity issues in wind power plants with grids, this study introduces an efficient mechanism based on a state feedback control structure to establish a fast and stable grid connection for a wind-driven doubly-fed induction generator (DFIG). Owing to a direct link through stator windings, a DFIG is significantly vulnerable to grid disturbances and experiences sizable inrush currents when connected to the power grid. The proposed control structure is designed based on a linear matrix inequality stabilization criterion, which is framed using a suitable Lyapunov candidate function. The control objective is to ensure that the stator voltage can exponentially converge to the grid voltage, accounting for balanced and unbalanced grid conditions. This is achieved by generating appropriate rotor voltage references for rotor-side converter control. This study also explores the capability of the proposed control structure to enhance the system’s robustness to external disturbances and uncertain parametric variations. Simulations confirmed the effectiveness and suitability of the developed structure in mitigating the adverse effects of the rapid onset of the grid voltage at the stator terminals of the DFIG under various grid conditions; the proposed structure could thus establish a reliable connection with negligible effects on the DFIG and the grid.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

LMI-Based State Feedback Control Structure for Resolving Grid Connectivity Issues in DFIG-Based WT Systems

Ali¹

2021

Eng

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“…Substituting (28) into (27), one obtains the required rotor flux magnitude to achieve the third synchronisation condition as…”

Section: Virtual Power For Grid Synchronisation (Mode 1)mentioning

confidence: 99%

“…All the DFIG control methods mentioned above, however, do not consider the process of grid synchronisation. Fast synchronisation and smooth grid connection are crucial because wind power generators need to be disconnected and reconnected to the grid under different operation conditions [26][27][28]. Besides, the control approaches mentioned above are only tested at certain rotor speeds.…”

Section: Introductionmentioning

confidence: 99%

Multi‐objective model predictive control of doubly‐fed induction generators for wind energy conversion

Zhu

2018

IET Generation, Transmission & Distribution

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“…Due to increasing the number of wind powers installation in future and increasing penetration level of DGs, application of improved automatic FRT capability to reduce the number of disconnections, more WT disconnections due to the policy of smart grids interconnection across the EU countries, suffering WTs from low voltage ride through (LWRT) and the disconnection of the DFIG according to grid code requirement, the start up and synchronization process of WTs are very important. This process should not exert transient and dynamic effects on this stable system [10].…”

Section: Introductionmentioning

confidence: 99%

A New Synchronization Method of Double Fed Induction Generator Wind Turbines to the Grid

Nayeripour

Mansouri

Waffenschmidt

2018

JENRR

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Meeting grid code requirement creates an obligation to smart WTs disconnection following some electrical or mechanical events. Increasing the penetration level of wind turbines (WTs) in different voltage levels of the network have a major effect on this condition. In this regard, soft and rapid synchronization control of doubly fed induction generator (DFIG) to reduce the dynamic and transient effects of DFIG on a smart grid is very important. This paper gives a review on WTs power generation and a basic requirement to operate in a stable manner in connection to the network at first. After that, different startup and synchronization methods will be described. Then, a new synchronization method for grid connection of DFIG driven by WT is proposed. In this method, the rotor side converter is synchronized with the induced voltage at the rotor winding of DFIG while the stator windings have been connected to the grid and the rotor accelerates normally with the wind torque. This startup process is soft and the synchronization is carried out between two low voltages with very low frequency and may overcome some difficulties and limitations of previous methods since it uses the rotor side converter as power electronics switches instead of the mechanical circuit breaker at stator side and causes the synchronization to be more accurate and controllable. The proposed method is evaluated with EMTDC/PSCAD simulation to show the performance of soft starting synchronization with lower electrical transients in comparison with traditional methods.

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A synchronization control technique for soft connection of doubly-fed induction generator based wind turbines to the power grid

Cited by 6 publications

References 15 publications

LMI-Based State Feedback Control Structure for Resolving Grid Connectivity Issues in DFIG-Based WT Systems

LMI-Based State Feedback Control Structure for Resolving Grid Connectivity Issues in DFIG-Based WT Systems

Multi‐objective model predictive control of doubly‐fed induction generators for wind energy conversion

A New Synchronization Method of Double Fed Induction Generator Wind Turbines to the Grid

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