A Novel Current Controller Scheme for Doubly Fed Induction Generators

Özsoy, Emre; Golubovic, Edin; Şabanoviç, Asif; Gökaşan, Metin; Boğosyan, Seta

doi:10.7305/automatika.2015.07.766

Cited by 12 publications

(9 citation statements)

References 22 publications

(32 reference statements)

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“…Many of research activities over the world focus on the impact of the system disturbances on the DFIG-based wind farms in the fault conditions [10]. So, they have proposed using a crowbar resistor to suppress rotor over-current and a DC chopper to smooth DC-link over-voltage as the first solution in the fault conditions [11]. The conventional crowbar circuit installed across the rotor terminals causes the rotor of the DFIG to become short circuit when a fault occurs.…”

Section: Introductionmentioning

confidence: 99%

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An Investigation of the Influences of the Voltage Sag on the Doubly Fed Induction Generator using Tuned PI Controllers

Rafiee

Aghamohammadi

2020

Teh. vjesn.

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The paper presents dynamic and transient behavior of the doubly fed induction generator (DFIG) in the wind farms in the normal and faulted grid respectively. When Voltage sag or any fault occurs in the network, the variables in the Doubly Fed Induction Generators are varying severely. If a voltage sag occurs, active and reactive power generated by the DFIG start to oscillate. The DC-link voltage will be bigger and will have fluctuation, and the rotor current will increase. In this paper, proportional integral (PI) controllers are used to control the DFIG in the wind farms for driving of the electronic devices including Rotor Side Converter (RSC) and Grid Side Converter (GSC) and controlling the active and reactive power of DFIG. PI parameters are tuned by particle swarm optimization algorithm (PSO). Whereas the model of DFIGs and electronic device in the paper are nonlinear so PI controllers cannot protect and control the DFIG as well. Hence, effect of PI parameters is investigated on the DFIG with simulating in MATLAB software. Also, low voltage ride through (LVRT) feature for DFIG is explored in presence of PI controllers. The results of the simulation present DClink over voltage and rotor and stator over current in the DFIG. In addition, it will explore the effect of proportional integral controllers when three-phase short circuit fault occurs.

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Section: Introductionmentioning

confidence: 99%

“…Moreover, using hardware strategies actually installs extra hardware in the DFIG and can increase the costs and may reduce the reliability of the system. So, in [30,31] a novel LVRT capability strategy is enhanced using sliding mode in DFIG-based wind farm without installing extra hardware.…”

Section: Introductionmentioning

confidence: 99%

An Investigation of the Influences of the Voltage Sag on the Doubly Fed Induction Generator using Tuned PI Controllers

Rafiee

Aghamohammadi

2020

Teh. vjesn.

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“…Solar photovoltaic system, fuel cell, wind turbine and microturbine are the most common DGs being utilized. They have given decentralized control capability to electric power system [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

A new power sharing control method for an autonomous microgrid with regard to the system stability

Khaledian

Golkar

2018

Automatika

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To cite this article: A. Khaledian & M. Aliakbar Golkar (2018) A new power sharing control method for an autonomous microgrid with regard to the system stability, Automatika, 59:1, 87-93, ABSTRACTDroop control is the conventional way to share the demand power among the generators in a microgrid. Analyzing this control method shows that it has poor performance in reactive power sharing. Generated reactive power of each microsource depends on the active load demand. In this paper, a control method is proposed to improve the reactive power sharing performance. It is indicated that higher reactive power droop gains make the generated reactive power to be less influenced from the changes in active load. However, high droop gains can lead the system to instability. Hence considering eigenvalue analysis of the microgrid, a new auxiliary controller is proposed to damp the oscillations caused by high droop gains. In the new method, there is not the need for monitoring the grid impedance to tune the controllers. To verify the proposed method, load step is applied to a test microgrid and the results are shown. In the new method, total generated reactive power is reduced in comparison to the conventional droop controller and the system stability is maintained. ARTICLE HISTORY

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“…DOb-based current controllers are applied to DFIGs and GCIs in [39,40] by considering robustness against parameter variations under balanced voltage sets. However, this method must be carefully tuned to suppress double-frequency oscillations.…”

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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A Novel Current Controller Scheme for Doubly Fed Induction Generators

Cited by 12 publications

References 22 publications

An Investigation of the Influences of the Voltage Sag on the Doubly Fed Induction Generator using Tuned PI Controllers

An Investigation of the Influences of the Voltage Sag on the Doubly Fed Induction Generator using Tuned PI Controllers

A new power sharing control method for an autonomous microgrid with regard to the system stability

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

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