Fault ride‐through enhancement in DFIG with control of stator flux using minimised series voltage compensator

Silveira, S.E. da; Silva, Sidelmo M.; Filho, Braz J. Cardoso

doi:10.1049/iet-rpg.2017.0804

Cited by 6 publications

(4 citation statements)

References 26 publications

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“…Consequently, based on (17), (18), (20) and (28), the current limitation of the GSC considering pulse-width modulation can be obtained as follows:…”

Section: Constraints Of Current References Considering the Pulse-wmentioning

confidence: 99%

“…In [17], an optimized reactive power flow is proposed in the case where an over-excited reactive power support is applied with the joint compensation from both the RSC and the GSC. In [18], a series voltage compensator method is used to reduce considerably the stator and rotor current as well as the rotor voltage, allowing the generator to ride-through the grid disturbances in the light of grid code. Note that the reactive current response methods aforementioned are only capable of dealing with symmetrical grid dips.…”

Section: Introductionmentioning

confidence: 99%

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Reactive Current Constraints and Coordinated Control of DFIG’s RSC and GSC During Asymmetric Grid Condition

Zhang

et al. 2020

IEEE Access

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Doubly fed induction generator (DFIG) based wind turbines have been found to be very sensitive to asymmetrical grid fault, wherein the harmful oscillations in the electromagnetic torque has being made a big concern. What makes things harder is that latest grid codes require grid-connected wind turbines to possess the ability of positive-and negative-sequence reactive current supporting. Hence, it becomes a guide mechanism to meet the grid codes and to ensure the operation safety of the wind turbines. Even though a tradeoff could be made between them, it is still quite difficult to coordinate the current dispatch of the DFIG's rotor-and grid-side converters (RSC and GSC), since there are totally eight currents needing to be carefully designed, i.e., the positive-and negative-sequence active and reactive currents in each converter. To address this issue, this paper analyzes the reactive current constraints in detail, based on which a coordinated reactive current control strategy is put forward for the DFIG-based wind turbines during asymmetrical grid condition. Simulation studies demonstrate the effectiveness of the proposed strategy. INDEX TERMS Doubly fed induction generator (DFIG), wind turbine, asymmetrical grid, reactive current support, fault ride-through (FRT).

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“…Consequently, based on (17), (18), (20) and (28), the current limitation of the GSC considering pulse-width modulation can be obtained as follows:…”

Section: Constraints Of Current References Considering the Pulse-wmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reactive Current Constraints and Coordinated Control of DFIG’s RSC and GSC During Asymmetric Grid Condition

Zhang

et al. 2020

IEEE Access

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“…The quantum field theory (QTF) approach was adopted as the control scheme. In [8], it was pointed out that it was difficult to access offshore doubly fed induction generators (DFIGs), so it was very important to avoid damages and shutdowns of an offshore WTG. A series voltage compensator (SVC) with minimized components was used to control the generator stator flux.…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of an Online Efficiency-Optimized Multi-Functional Compensator for Wind Turbine Generators

Ma,

Zhou

2023

Micromachines

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In recent years, the penetration of wind power generation has been growing steadily to adapt to the modern trend of boosting renewable energy (RE)-based power generation. However, the dynamic power flow of wind turbine generators (WTGs) is unpredictable and can have a negative impact on existing power grids. To solve this problem efficiently, this paper presents a multifunctional WTG intelligent compensator (WTGIC) for the advanced power management and compensation of power systems embedded with WTGs. The proposed WTGIC consists of a power semiconductor device (PSD)-based bidirectional three-phase inverter module and an energy storage unit (ESU). In order to reduce system costs and improve reliability, efficiency, and flexibility, various control functions and algorithms are integrated via a modularized all-digital control scheme. In this paper, the configuration of the proposed WTGIC is first introduced, and then the operating modes and related compensation and control functions are addressed. An online efficiency optimization algorithm is proposed, and the required controllers are designed and implemented. The designed functions of the proposed WTGIC include high-efficiency charging/discharging of the ESU, real-time power quality (PQ) compensation, and high-efficiency power smoothing of the WTGs. The feasibility and effectiveness of the proposed WTGIC are verified using case studies with simulations in the Powersim (PSIM) environment and the implementation of a small-scale hardware experimental system with TI’s digital signal processor (DSP) TI28335 as the main controller.

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“…It has the advantages of variable-speed operation, and low investment due to a reduced power rating of the converters compared with the direct-drive generators. Since its stator is connected to the grid, the DFIG is vulnerable to the voltage drop and has to follow the grid codes about low-voltage ride-through (LVRT) [1][2][3][4]. With the increasing capacity of wind power, the LVRT requirement to the DFIGs focuses more on the active and reactive power regulation capabilities; hence, the crowbar adsorbing the imbalanced energy is less attractive.…”

Section: Introductionmentioning

confidence: 99%

Analytical LVRT analysis of doubly fed induction generator with MPC‐basedDSCC/DRCC

Huang

Sun

2019

IET Renewable Power Generation

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Under the low-voltage ride-through (LVRT) of the doubly fed induction generator, extra efforts are required for the model predictive control (MPC)-based direct stator/rotor current controls (DSCC/DRCC) against the stator flux oscillation. Constant stator/rotor currents are maintained at the cost of rotor/stator current oscillations, respectively, due to stator flux oscillation. Necessity to incorporate the stator flux transient in the MPC-based DSCC/DRCC under the LVRT is analysed based on tracking effects of the current references. To quantify LVRT effect with the MPC-based DSCC/DRCC, analytical expressions of the stator current, rotor current and rotor voltage are proposed, whose accuracy is validated based on comparison with the time-domain simulations. On the basis of analytical study, advantages and disadvantages of the DSCC/DRCC are analysed considering impacts of the current oscillations on the security of the rotor-side converter. With the DRCC, rotor voltage increase is suppressed with damping to the stator flux oscillation and rotor current constraint is satisfied without decreasing stator output power; thus, the LVRT effect is desirable compared with the DSCC. The MPC-based DSCC/DRCC is extended to LVRT under the asymmetrical fault to realise effective control to both the positive and negative sequence stator/rotor currents.

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Fault ride‐through enhancement in DFIG with control of stator flux using minimised series voltage compensator

Cited by 6 publications

References 26 publications

Reactive Current Constraints and Coordinated Control of DFIG’s RSC and GSC During Asymmetric Grid Condition

Reactive Current Constraints and Coordinated Control of DFIG’s RSC and GSC During Asymmetric Grid Condition

Design and Implementation of an Online Efficiency-Optimized Multi-Functional Compensator for Wind Turbine Generators

Analytical LVRT analysis of doubly fed induction generator with MPC‐basedDSCC/DRCC

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