Modeling and Ride-Through Control of Doubly Fed Induction Generators During Symmetrical Voltage Sags

Mendes, Victor F.; Sousa, Clodualdo Venício de; Silva, Selênio Rocha; Rabelo, B.; Hofmann, W.

doi:10.1109/tec.2011.2163718

Cited by 87 publications

(41 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nowadays, the gear-drive doubly-fed induction generator (DFIG) based wind turbine is dominating the market [4]. The DFIG technology has the advantage of using partial scale converters, decreasing the system costs, but it has two main drawbacks: the use of a gearbox, which is a weak point in the structure with high maintenance costs, and due to the direct stator connection to the grid, this technology is greatly affected by grid disturbances [5][6][7][8]. In this context, several papers in the literature address the behavior of WECS during voltage sags and propose strategies to improve the system RTFC.…”

Section: Introductionmentioning

confidence: 99%

Low Voltage Ride-Through Capability Solutions for Permanent Magnet Synchronous Wind Generators

et al. 2016

View full text Add to dashboard Cite

Due to the increasing number of wind power plants, several countries have modified their grid codes to include specific requirements for the connection of this technology to the power system. One of the requirements is the ride-through fault capability (RTFC), i.e., the system capability to sustain operation during voltage sags. In this sense, the present paper intends to investigate the behavior of a full-converter wind generator with a permanent magnet synchronous machine during symmetrical and asymmetrical voltage sags. Two solutions to improve the low voltage ride-through capability (LVRT) of this technology are analyzed: discharging resistors (brake chopper) and resonant controllers (RCs). The design and limitations of these solutions and the others proposed in the literature are discussed. Experimental results in a 34 kW test bench, which represents a scaled prototype of a real 2 MW wind conversion system, are presented.

show abstract

Section: Introductionmentioning

confidence: 99%

Low Voltage Ride-Through Capability Solutions for Permanent Magnet Synchronous Wind Generators

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The RSC converter controls active power (P S ) and reactive (Q S ) power between the machine stator and the grid. Research involving DFIG is worried about its effects into the electric system and about the impacts of grid disturbances in DFIG [3,4]. Nowadays, with the increased penetration of wind turbines in electric system, the grid codes understand that the generators have to contribute with the system stability.…”

Section: Introductionmentioning

confidence: 99%

“…The performance of each solution is evaluated using the simulation tool PSCAD TM /EMTDC TM . In order to provide normalization, all tests were done under the IEC (International Electrotechnical Commission) 61400 wind turbine standards [14], adopted by most manufacturers and publications in the area [3,15,16]. …”

Section: Introductionmentioning

confidence: 99%

Enhancing LVRT of DFIG by Using a Superconducting Current Limiter on Rotor Circuit

et al. 2015

View full text Add to dashboard Cite

This paper have studied the dynamic of a 2.0 MW Doubly Fed Induction Generator (DFIG) during a severe voltage sag. Using the dynamic model of a DFIG, it was possible to determine the current, Electromagnetic Force and flux behavior during three-phase symmetrical voltage dip. Among the technologies of wind turbines the DFIG is widely employed; however, this machine is extremely susceptible to disturbances from the grid. In order to improve DFIG Low Voltage Ride-Through (LVRT), it is proposed a novel solution, using Superconducting Current Limiter (SCL) in two arrangements: one, the SCL is placed between the machine rotor and the rotor side converter (RSC), and another placed in the RSC DC-link. The proposal is validated through simulation using PSCAD TM /EMTDC TM and according to requirements of specific regulations. The analysis ensure that both SCL arrangements behave likewise, and are effective in decrement the rotor currents during the disturbance.

show abstract

“…In terms of voltage sag scenarios, reported as the most common grid disturbance in industrial power systems, there have been many studies focusing on the electromagnetic transient process [4]- [7] and LVRT enhancement technologies [8]- [17] for DFIG-based WTs. The most commonly accepted technical solution applied in engineering can be summarized as follows: 1) for a mild voltage dip, only modified control strategies for grid-side and rotor-side converters (GSC and RSC) are applied, such as the flux demagnetizing approach [10]; 2) for a depth voltage drop, additional hardware devices, such as resistances connected in parallel with the RSC (the so called crowbar [11], [12]) or with the dc-link capacitor (the so called chopper [13]).…”

Section: Introductionmentioning

confidence: 99%

Reactive Current Assignment and Control for DFIG Based Wind Turbines during Grid Voltage Sag and Swell Conditions

Xu¹,

Ma²,

Sun³

2015

Journal of Power Electronics

View full text Add to dashboard Cite

This paper proposes a reactive current assignment and control strategy for a doubly-fed induction generator (DFIG) based wind-turbine generation system under generic grid voltage sag or swell conditions. The system's active and reactive power constrains during grid faults are investigated with both the grid-and rotor-side convertors (GSC and RSC) maximum ampere limits considered. To meet the latest grid codes, especially the low-and high-voltage ride-through (LVRT and HVRT) requirements, an adaptive reactive current control scheme is investigated. In addition, a torque-oscillation suppression technique is designed to reduce the mechanism stress on turbine systems caused by intensive voltage variations. Simulation and experiment studies demonstrate the feasibility and effectiveness of the proposed control scheme to enhance the fault ride-through (FRT) capability of DFIG-based wind turbines during violent changes in grid voltage.

show abstract

Modeling and Ride-Through Control of Doubly Fed Induction Generators During Symmetrical Voltage Sags

Cited by 87 publications

References 24 publications

Low Voltage Ride-Through Capability Solutions for Permanent Magnet Synchronous Wind Generators

Low Voltage Ride-Through Capability Solutions for Permanent Magnet Synchronous Wind Generators

Enhancing LVRT of DFIG by Using a Superconducting Current Limiter on Rotor Circuit

Reactive Current Assignment and Control for DFIG Based Wind Turbines during Grid Voltage Sag and Swell Conditions

Contact Info

Product

Resources

About