Influences on the LVRT behavior of DFIG wind turbine systems

Herzog, Fabian; Röder, Julian; Frehn, Andreas; Ruhe, N; Doncker, Rik W. De

doi:10.1088/1742-6596/2265/2/022075

Cited by 4 publications

(5 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The impedance of the grid governs the amount of voltage deviation while supplying QP to the grid. In addition, the X/R ratio is another important parameter [54].…”

Section: Figure 1 Lvrt Code Requirementmentioning

confidence: 99%

RETRACTED: Enhancing the low-voltage ride-through capability of a wind turbine double- fed induction generator using ANFIS controller and a crowbar circuit

Abdelaal

2024

Preprint

View full text Add to dashboard Cite

The focal target of this paper is to increase the LVRT of the DFIG driven by WT. This task is realized, firstly, by inserting a crowbar circuit (CB) into rotor circuit (RC), in case of voltage dip (VD), to guard it from high current and high voltage that could result from the transient flux produced by the VD. In case of no CB circuit, the system may be vulnerable to instability. Secondly, a proposed ANFIS controller is proposed to control both the rotor side converter (RSC) and the grid side converter (GSC). While the RSC controller regulates the electromagnetic torque, the GSC controller control both the real power (RP) and reactive power (QP) supplied to the system during normal operation conditions beside with it keeps the value of the dc link voltage (DCLV) fixed. To enhance the LVRT, the GSC is controlled such that it injects the necessary reactive power required during severe voltage dips to improve the LVRT competency of the DFIG. From the results, it is obvious that the hybrid ANFIS and CB circuit provides an improved LVRT response in challenging operating conditions.

show abstract

“…The impedance of the grid governs the amount of voltage deviation while supplying QP to the grid. In addition, the X/R ratio is another important parameter [54].…”

Section: Figure 1 Lvrt Code Requirementmentioning

confidence: 99%

RETRACTED: Enhancing the low-voltage ride-through capability of a wind turbine double- fed induction generator using ANFIS controller and a crowbar circuit

Abdelaal

2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Herzog in Ref. [54] stated that rotor velocity is very crucial to LVRT since it affects the slip of the machine; therefore, it will affect the machine dynamic during abnormal conditions. Also He stated that Power system parameters strongly affect the response of the DFIG to LVRT [54].…”

Section: Figure 1 Lvrt Code Requirementmentioning

confidence: 99%

“…[54] stated that rotor velocity is very crucial to LVRT since it affects the slip of the machine; therefore, it will affect the machine dynamic during abnormal conditions. Also He stated that Power system parameters strongly affect the response of the DFIG to LVRT [54]. The most important parameter is the power system impedance at the PCC, which can be, determine from the short circuit power.…”

Section: Figure 1 Lvrt Code Requirementmentioning

confidence: 99%

See 1 more Smart Citation

RETRACTED: Enhancing the low-voltage ride-through capability of a wind turbine double-fed induction generator using hybrid model contains an adaptive neurofuzzy inference system controller and a crowbar circuit.

2024

Preprint

View full text Add to dashboard Cite

The focal target of this paper is to increase the LVRT of the DFIG driven by WT. This task is realized, firstly, by inserting a crowbar circuit (CB) into rotor circuit (RC), in case of voltage dip (VD), to guard it from high current and high voltage that could result from the transient flux produced by the VD. In case of no CB circuit, the system may be vulnerable to instability. Secondly, a proposed ANFIS controller is proposed to control both the rotor side converter (RSC) and the grid side converter (GSC). While the RSC controller regulates the electromagnetic torque, the GSC controller control both the real power (RP) and reactive power (QP) supplied to the system during normal operation conditions beside with it keeps the value of the dc link voltage (DCLV) fixed. To enhance the LVRT, the GSC is controlled such that it injects the necessary reactive power required during severe voltage dips to improve the LVRT competency of the DFIG. From the results, it is obvious that the hybrid ANFIS and crowbar technique provides an improved LVRT response in challenging operating conditions.

show abstract

“…They lead to high electrical and mechanical loads, which can damage the mechanical drivetrain and electrical components. However, grid faults have been thoroughly investigated with WTs with DFIGs, which use a partial-scale converter [3,7]. In contrast to DFIGs, a grid voltage drop with SCIGs has nearly no influence on the mechanical drivetrain of the WT.…”

Section: Introductionmentioning

confidence: 99%

Impact of DC link brake chopper design on the LVRT behavior of full-scale converter wind turbines

Herzog¹,

Röder²,

Doncker³

2023

Forsch Ingenieurwes

View full text Add to dashboard Cite

Wind turbines (WTs) are loaded by the wind and by the electrical grid. A low voltage ride through (LVRT) is a special load case for WTs, which can be critical for their drivetrain. They are usually less severe for WTs with a full-scale converter (FSC); however, in some cases there are still loads observable in the mechanical drivetrains of WTs with FSCs. Different aspects like the brake chopper design, the control and specifications of the grid side converter (GSC) as well as the grid and fault parameters affect these loads. In this paper, three different LVRT behaviors of a WT with a squirrel-cage induction generator (SCIG) and a FSC were investigated via simulations. In the worst case, a sharp peak in the electromagnetic torque of the generator after fault clearance is possible. The cause lies in the GSC control, especially the phase-locked loop (PLL), and can also be influenced by adjusting the control parameters, brake chopper and filter design. The resulting mechanical drivetrain torque, on the other hand, is increased by only 2.9% for a very short time. Thus, the loading of the mechanical drivetrain components is only slightly increased. Therefore, the risk of damage to the mechanical components of the FSC WT due to grid faults is relatively low.

show abstract

Influences on the LVRT behavior of DFIG wind turbine systems

Cited by 4 publications

References 12 publications

RETRACTED: Enhancing the low-voltage ride-through capability of a wind turbine double- fed induction generator using ANFIS controller and a crowbar circuit

RETRACTED: Enhancing the low-voltage ride-through capability of a wind turbine double- fed induction generator using ANFIS controller and a crowbar circuit

RETRACTED: Enhancing the low-voltage ride-through capability of a wind turbine double-fed induction generator using hybrid model contains an adaptive neurofuzzy inference system controller and a crowbar circuit.

Impact of DC link brake chopper design on the LVRT behavior of full-scale converter wind turbines

Contact Info

Product

Resources

About