A novel power-flow balance LVRT control strategy for low-speed direct-drive PMSG wind generation system

Li, Jun; Li, Dujiang; Lei, Hong; Xie, Changjun; Chen, Guozhu

doi:10.1109/iecon.2010.5675131

Cited by 18 publications

(13 citation statements)

References 11 publications

(10 reference statements)

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“…To prevent DC-link over-voltage, the most commonly method is to add un-loading branches based on resistor as shown in Fig.1(a)(b). According to LVRT requirement in Fig.2, the maximum imbalance energy W im is calculated by (13), where P N is rated power of wind turbines. For a 1MW converter, a resistor for 1.2MJ and 1.2Ω is needed for a certain margin.…”

Section: B Behavior During Grid Voltage Sagsmentioning

confidence: 99%

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A novel LVRT strategy for direct-drive wind turbines based on permanent magnet synchronous generator

Tang

Jin

Zhang

et al. 2012

Proceedings of the 7th International Power Electronics and Motion Control Conference

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Increasing penetration level of wind energy into the power system over the last decades has brought new issues and challenges. One of these concerns is the issue of low voltage ride through (LVRT). In this paper, given the characteristics of MWlevel direct-drive wind turbines based on permanent magnet synchronous generator, a novel LVRT strategy is proposed, which is the combination of coordinate control of generator-side and grid-side converters and small un-loading branch. The implementation principle as well as calculation criteria are explained in depth. Finally, the feasibility of the proposed method is demonstrated by simulation results under balanced and unbalanced sag conditions.

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Section: B Behavior During Grid Voltage Sagsmentioning

confidence: 99%

“…Thus imbalance energy present otherwise in the DClink when the traditional control strategy is used, is now transferred to kinetic energy of wind turbines [11] [12]. [13].…”

Section: Introductionmentioning

confidence: 99%

A novel LVRT strategy for direct-drive wind turbines based on permanent magnet synchronous generator

Tang

Jin

Zhang

et al. 2012

Proceedings of the 7th International Power Electronics and Motion Control Conference

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“…a) Pitch Control to reduce the power coefficient b) Increase the rotational blade speed to change TSR [11].…”

Section: Fig 3 DC Link Over Voltagementioning

confidence: 99%

Ride-through of PMSG Wind Power System Under the Distorted and Unbalanced Grid Voltage Dips

Sim¹,

Kim²,

Son³

et al. 2012

Journal of Electrical Engineering and Technology

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-This paper presents a ride-through skill of PMSG wind turbine system under the distorted and unbalanced grid voltage dips. When voltage dips occur in the grid, pitch control and generator speed control as well as a parallel resistor of DC-link help to keep the turbine's safety. Modern grid code requires a wind turbine to supply reactive currents to help voltage recovery after grid faults clearance. In order to supply reactive currents to the grid in case of the distortedly unbalanced grid voltage dips, a special PLL is needed to control the grid side converter and to regulate the grid voltages symmetrically. The proposed method is applied to 2MW multi-pole PMSG wind turbine system, and verified by simulation.

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“…The GSC maintains the DC-link voltage and transfers the active power fed from the MSC to the grid, meanwhile, it also controls the reactive power following the requirements of the grid and adjusts the power factor of the PMSG WT system [18].…”

Section: Gsc Controlmentioning

confidence: 99%

Coordinated Control Strategies of VSC-HVDC-Based Wind Power Systems for Low Voltage Ride Through

Zhang

et al. 2015

Energies

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Abstract:The Voltage Source Converter-HVDC (VSC-HVDC) system applied to wind power generation can solve large scale wind farm grid-connection and long distance transmission problems. However, the low voltage ride through (LVRT) of the VSC-HVDC connected wind farm is a key technology issue that must be solved, and it is currently lacking an economic and effective solution. In this paper, a LVRT coordinated control strategy is proposed for the VSC-HVDC-based wind power system. In this strategy, the operation and control of VSC-HVDC and wind farm during the grid fault period is improved. The VSC-HVDC system not only provides reactive power support to the grid, but also effectively maintains the power balance and DC voltage stability by reducing wind-farm power output, without increasing the equipment investment. Correspondingly, to eliminate the influence on permanent magnet synchronous generator (PMSG)-based wind turbine (WT) systems, a hierarchical control strategy is designed. The speed and validity of the proposed LVRT coordinated control strategy and hierarchical control strategy were verified by MATLAB/Simulink simulations.

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A novel power-flow balance LVRT control strategy for low-speed direct-drive PMSG wind generation system

Cited by 18 publications

References 11 publications

A novel LVRT strategy for direct-drive wind turbines based on permanent magnet synchronous generator

A novel LVRT strategy for direct-drive wind turbines based on permanent magnet synchronous generator

Ride-through of PMSG Wind Power System Under the Distorted and Unbalanced Grid Voltage Dips

Coordinated Control Strategies of VSC-HVDC-Based Wind Power Systems for Low Voltage Ride Through

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