Investigation of Doubly Fed Induction Generator Behavior Under Symmetrical and Asymmetrical Fault Conditions

Tamvada, Karthik; Subramaniam, Umashankar; Sanjeevikumar, P.

doi:10.1007/978-981-10-4762-6_33

Cited by 2 publications

(3 citation statements)

References 8 publications

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“…The rotor winding induced EMF in terms of rotor voltage, so the rotor side current can be expressed as: (6) The equation above induces the EMF based on stator flux dynamics; it can be induced in the stator reference frame or in the rotor reference frame. The equivalent circuit of the DFIG in Fig.…”

Section: Mathematical Model Of Dfigmentioning

confidence: 99%

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Symmetrical Short-Circuit Parameters Comparison of DFIG–WT

Nazir

2017

Int. j. electr. comput. eng. syst. (Online)

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Renewable energy with new resources is depleting the fossil fuel-based energy resources. Renewable energy sources (such as wind energy) based power generators are important energy conversion machines and have widely industrial and commercial applications due to their superior performance, and the fact that they endure faults well and are environmentally friendly. The study of the transient behavior of such generators under fault condition has drawn much attention. This study presents Doubly-Fed Induction Generator (DFIG) perturbation during a symmetrical (three-phase) short circuit (SSC) at different points. Simulation results reveal that after a fault occurs, there is decay of SC parameters (transient time, maximum current, steady-state and voltage dip) at the point of common coupling (PCC) and the grid-side converter (GSC) of DFIG. Simulation results depict a more sensitive and robust point during a SSC of DFIG. Current findings present the main difference between the PCC and the GSC during SSC faults. These comparisons provide a more precise understanding of fault diagnosis reliability with reduced complexity, stability, and optimization of the system. This study verified by the simulation results helps us understand and improve the performance of sensor sensibility (measurements), develop control schemes, protection strategy and select a more accurate and proficient system among other wind energy conversion systems (WECS).

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Section: Mathematical Model Of Dfigmentioning

confidence: 99%

“…The DFIG is commonly used in wind farms; this is an important wind energy conversion system (WECS) having variable-speed capability [6]. These generators are also known as wound rotors or slip-ring induction machines [6][7]. According to the usage based available data, the DFIG is available in different power ranges (1.5 MW-6 MW).…”

Section: Introductionmentioning

confidence: 99%

Symmetrical Short-Circuit Parameters Comparison of DFIG–WT

Nazir

2017

Int. j. electr. comput. eng. syst. (Online)

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“…Doubly fed induction generator (DFIG)-based wind turbines are also very fragile under grid voltage problems [7,8,[35][36][37][38], and it can be considered that problem solution techniques applied to DFIG applications can be utilized in GCI applications. DOb-based current controllers are applied to DFIGs and GCIs in [39,40] by considering robustness against parameter variations under balanced voltage sets.…”

Section: Introductionmentioning

confidence: 99%

Control Strategy for a Grid-Connected Inverter under Unbalanced Network Conditions—A Disturbance Observer-Based Decoupled Current Approach

et al. 2017

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This paper proposes a new approach on the novel current control strategy for grid-tied voltage-source inverters (VSIs) with circumstances of asymmetrical voltage conditions. A standard grid-connected inverter (GCI) allows the degree of freedom to integrate the renewable energy system to enhance the penetration of total utility power. However, restrictive grid codes require that renewable sources connected to the grid must support stability of the grid under grid faults. Conventional synchronously rotating frame dq current controllers are insufficient under grid faults due to the low bandwidth of proportional-integral (PI) controllers. Hence, this work proposes a proportional current controller with a first-order low-pass filter disturbance observer (DOb). The proposed controller establishes independent control on positive, as well as negative, sequence current components under asymmetrical grid voltage conditions. The approach is independent of parametric component values, as it estimates nonlinear feed-forward terms with the low-pass filter DOb. A numerical simulation model of the overall power system was implemented in a MATLAB/Simulink (2014B, MathWorks, Natick, MA, USA). Further, particular results show that double-frequency active power oscillations are suppressed by injecting appropriate negative-sequence currents. Moreover, a set of simulation results provided in the article matches the developed theoretical background for its feasibility.

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Investigation of Doubly Fed Induction Generator Behavior Under Symmetrical and Asymmetrical Fault Conditions

Cited by 2 publications

References 8 publications

Symmetrical Short-Circuit Parameters Comparison of DFIG–WT

Symmetrical Short-Circuit Parameters Comparison of DFIG–WT

Control Strategy for a Grid-Connected Inverter under Unbalanced Network Conditions—A Disturbance Observer-Based Decoupled Current Approach

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