LVRT capability enhancement of DFIG based wind turbine with coordination control of dynamic voltage restorer and inductive fault current limiter

Zhang, Dongyin; Xu, Hanping; Qiao, Li; Chen, Lei

doi:10.1371/journal.pone.0221410

Cited by 21 publications

(20 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In practice, the fundamental variables of the power system such as voltage, current, and frequency should be within the threshold limits (i.e. safety limits) during the system events/contingencies, otherwise, the protection schemes/circuits will be activated for a stable and secure operation [31,32]. With the changing configuration of the power system and micro-grid/smart grid scenarios, each country updates its GCRs mainly emphasising the capability of LVRT on DFIG-WTs.…”

Section: Proposed Control Strategies Employed For Dfig-based Wecsmentioning

confidence: 99%

Modified demagnetisation control strategy for low‐voltage ride‐through enhancement in DFIG‐based wind systems

Senapati¹,

Pradhan

Nayak

et al. 2020

IET Renewable Power Generation

View full text Add to dashboard Cite

The large-scale wind energy conversion systems (WECSs) based on doubly-fed induction generators (DFIGs) are very popular in recent years due to the numerous technical and economic benefits. With the increasing penetration level of wind energy, the latest grid codes require the DFIG-based WECSs to remain connected to the grid under grid fault scenarios and deliver the required reactive power into the grid. However, the direct connection of the stator of the DFIG to the grid makes it prone to grid disturbances, especially to voltage sag. This study proposes a modified demagnetisation control strategy to enhance the low-voltage ride-through (LVRT) capability of the DFIG under grid faults. The proposed control strategy is implemented in a coordinated approach by using the existing demagnetisation control and the addition of an external resistance in the stator side of the DFIG. The demagnetisation control damps the direct current component of the stator flux and the external resistance accelerates the damping of the transient flux by decreasing the time constant and hence, enhancing the LVRT capability of DFIG. The effectiveness of the proposed control strategy is demonstrated under both symmetrical and asymmetrical grid faults simulated system through MATLAB/Simulink®. The comparative results justify the merits of the proposed methodology. s time constant, s ω r angular speed of rotor flux, r.p.m. ω s angular speed of stator flux, r.p.m. *r *superscript denoted for the rotor reference frame *1,2,0 *subscript denoted for positive-, negative-, and zerosequence components, respectively

show abstract

Section: Proposed Control Strategies Employed For Dfig-based Wecsmentioning

confidence: 99%

Modified demagnetisation control strategy for low‐voltage ride‐through enhancement in DFIG‐based wind systems

Senapati¹,

Pradhan

Nayak

et al. 2020

IET Renewable Power Generation

View full text Add to dashboard Cite

show abstract

“…For voltage support, the E.ON requirement proposes that WTs should provide reactive current when the voltage reaches the dead band limit, and more reactive current injection is required when the voltage sags go further, as shown in figure 3 [1,8]. Support for reactive current in response to large voltage drops must be performed within 20 ms after fault detection [10]. DFIG-based WTs are mostly used and dominate the largest share of the market due to their advantages including wide speed range, independent control of real and reactive power, and lower power of the excitation converter [1][2][3]6].…”

Section: Introductionmentioning

confidence: 99%

“…During Voltage sags, damaging over-currents can flow in the DFIG stator and its rotor, an overshoot of the permissible DC-Link voltage threshold can be observed, and torque fluctuation can decrease the drive train lifetime [1,8]. To meet the LVRT requirement of GCR, the DFIG behavior during and after voltage sags must be examined as follows: (1) electromagnetic torques and turbines speed should be suitably controlled to ensure safe operation [1,8,11]; (2) overvoltage and overcurrent in rotor and stator windings should be limited to avoid damaging the BTB converters [10,11];…”

Section: Introductionmentioning

confidence: 99%

“…(3) voltage of DC-link must remain constant to ensure the desired operation of the GSC and RSC [1,8,12]; (4) sufficient reactive power is needed to support grid recovery [1][2][3][4][5][6][7][8][9][10][11][12][13]. In order to overcome these restrictions and subsequently enhance the LVRT capability of DFIG-WTs, Extensive methods including external retrofit techniques and internal control techniques have been proposed [1].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced LVRT capability of Wind Turbine based on DFIG using Dynamic Voltage Restorer controlled by ADRC-based Feedback control

et al. 2021

View full text Add to dashboard Cite

For grid-connected DFIG-based wind turbine, Fault Ride Through (FRT) or Low Voltage Ride Through (LVRT) capability is vital problem that need to be improved. This paper proposes an Active Disturbance Rejection Control (ADRC) strategy applied to Doubly Fed Induction Generator (DFIG) based Wind turbine (WT), which integrates a Dynamic Voltage Restorer (DVR). The DVR connect in series the DFIG output terminal and the utility grid. The ADRC scheme of the new topology DFIG-based WT with integrated DVR is designed to compensate grid voltage disturbances, which in turn meet LVRT requirement and increase the level of wind power penetration. The performance of this WT-DFIG-DVR structure is investigated in different operating scenarios in order to show the skills of the designed controllers.

show abstract

“…and DC‐link voltages 2.0 p.u. if no countermeasure is adopted 6 . Considering that the new grid codes demand that DFIG remains connected during those faults, many recent researches approach the suitability of DFIG to these codes without compromise its components safe operation.…”

Section: Introductionmentioning

confidence: 99%

A new hybrid multilevel back‐to‐back converter for doubly fed induction generator ‐based wind turbines' fault supportability

Amorim

Oliveira

Simonetti

2021

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

Summary Wind turbines based on doubly fed induction generator (DFIG) have been increasing their participation in electrical grid. However, for these turbines, grid faults are a great issue. During grid voltage transients, the EMF induced on rotor is increased due to the sudden flux variation. High EMF leads to high currents on rotor circuit that could be hazardous to power electronics converter. A novel hybrid multilevel converter is proposed in this article. The proposed converter is the combination of traditional three‐phase converter and monophasic full‐bridge inverters connected in series with each phase. Employing this topology, it is possible to produce higher voltages in rotor circuit, which can oppose the machine‐induced voltage during the faults, limiting hazardous currents on rotor circuit. The design procedure and the voltage control strategy for the proposed converter topology are presented. Simulation results, considering symmetrical and asymmetrical faults, are presented for a 2 MW turbine. Rotor currents are restricted near to their nominal values, which ensure safety operation for the structure, especially for the power electronics. These results demonstrate the potential to replace traditional solutions and the effectiveness of the proposal as a protection circuit for DFIG by limiting currents and keeping power under control during voltage dips.

show abstract

LVRT capability enhancement of DFIG based wind turbine with coordination control of dynamic voltage restorer and inductive fault current limiter

Cited by 21 publications

References 53 publications

Modified demagnetisation control strategy for low‐voltage ride‐through enhancement in DFIG‐based wind systems

Modified demagnetisation control strategy for low‐voltage ride‐through enhancement in DFIG‐based wind systems

Enhanced LVRT capability of Wind Turbine based on DFIG using Dynamic Voltage Restorer controlled by ADRC-based Feedback control

A new hybrid multilevel back‐to‐back converter for doubly fed induction generator ‐based wind turbines' fault supportability

Contact Info

Product

Resources

About