A Study of Efficiency in a Reduced Matrix Converter for Offshore Wind Farms

Garcés, Alejandro; Molinas, Marta

doi:10.1109/tie.2011.2130502

Cited by 113 publications

(39 citation statements)

References 27 publications

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“…During super synchronous operation condition, the power is fed to the grid from rotor of DFIG is known as slip power recovery. During the operation when power is fed from grid to rotor of DFIG, a high-voltage stress continues across the switches of PEC (Ugalde-Loo et al 2013;Blaabjerg et al 2012;Garcés and Molinas 2012;Ashfaq and Tripathi 2012;Soufi et al 2013). Hence high dc voltage exists; this is also a factor responsible for the CMV.…”

Section: Analysis and Review Of Matrix Converter Performancementioning

confidence: 99%

Mitigation of operational losses in matrix converter fed DFIG for WECS

Ashfaq

Tripathi

2015

Renewables

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With the change in the wind profile, the speed of doubly fed induction generator (DFIG) of wind energy conversion system (WECS) changes from super synchronous to sub synchronous range and vice versa. DFIG is operated to generate quality power; hence, power at rotor side is controlled using matrix converter taking power from grid and feeding back power to the grid depending on the wind profile. Input voltage required to be fed to the rotor side of DFIG is always changing and depends on the speed of the available wind. During the operation when power is fed from grid to rotor of DFIG, a high-voltage stress continues across the switches of power electronic converter (PEC). In existing topologies of the matrix converter used with the DFIG in WECS, the constant voltage stress at the power electronic switch (PES) is available which causes the higher losses across the switch. This also causes common mode voltage (CMV) which leads to the over voltage stress. This may cause winding insulation damage and bearing failure of the DFIG. Furthermore, higher dv/dt of CMV raises the leakage current which causes the thermal stress and electromagnetic noise to the equipments installed near the matrix converter. In this paper, the work done is focused on the mitigation of operational losses in matrix converter fed doubly fed induction generator for wind energy conversion system. The overall loss in the matrix converter and mitigation of common mode voltage is achieved, which improves the overall efficiency and the performance of the wind energy conversion system.

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Section: Analysis and Review Of Matrix Converter Performancementioning

confidence: 99%

Mitigation of operational losses in matrix converter fed DFIG for WECS

Ashfaq

Tripathi

2015

Renewables

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“…In [17], a new direct AC/AC power converter was introduced that fulfills the aforementioned requirements of Fig. 2 owing to fewer stages of conversion, the use of a HF transformer, and the absence of a bulky electrolyte capacitor (see Fig.…”

Section: A Ac/dc Power Converter Topologiesmentioning

confidence: 99%

High-Power-Density Power Conversion Systems for HVDC-Connected Offshore Wind Farms

Parastar¹,

Seok²

2013

Journal of Power Electronics

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Offshore wind farms are rapidly growing owing to their comparatively more stable wind conditions than onshore and land-based wind farms. The power capacity of offshore wind turbines has been increased to 5MW in order to capture a larger amount of wind energy, which results in an increase of each component's size. Furthermore, the weight of the marine turbine components installed in the nacelle directly influences the total mechanical design, as well as the operation and maintenance (O&M) costs. A reduction in the weight of the nacelle allows for cost-effective tower and foundation structures. On the other hand, longer transmission distances from an offshore wind turbine to the load leads to higher energy losses. In this regard, DC transmission is more useful than AC transmission in terms of efficiency because no reactive power is generated/consumed by DC transmission cables. This paper describes some of the challenges and difficulties faced in designing high-power-density power conversion systems (HPDPCSs) for offshore wind turbines. A new approach for high gain/high voltage systems is introduced using transformerless power conversion technologies. Finally, the proposed converter is evaluated in terms of step-up conversion ratio, device number, modulation, and costs.

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“…Matrix converter has shown good efficiency results with the use of SiC devices in higher switching frequencies [15], fact that allows the replacement of the classic transformer by matrix converter topologies. Furthermore, a matrix converter with high frequency transformers has already shown its superiority versus the conventional ways as in [20,21]. PET has the possibility of achieving this challenge since it implements power electronics devices that can easily function under control.…”

Section: Introductionmentioning

confidence: 99%

The Three-Phase Power Router and Its Operation with Matrix Converter toward Smart-Grid Applications

et al. 2015

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A power router has been recently developed for both AC and DC applications that has the potential for smart-grid applications. This study focuses on three-phase power switching through the development of an experimental setup which consists of a three-phase direct AC/AC matrix converter with a power router attached to its output. Various experimental switching scenarios with the loads connected to different input sources were investigated. The crescent introduction of decentralized power generators throughout the power-grid obligates us to take measurements for a better distribution and management of the power. Power routers and matrix converters have great potential to succeed this goal with the help of power electronics devices. In this paper, a novel experimental three-phase power switching was achieved and the advantages of this operation are presented, such as on-demand and constant power supply at the desired loads.

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A Study of Efficiency in a Reduced Matrix Converter for Offshore Wind Farms

Cited by 113 publications

References 27 publications

Mitigation of operational losses in matrix converter fed DFIG for WECS

Mitigation of operational losses in matrix converter fed DFIG for WECS

High-Power-Density Power Conversion Systems for HVDC-Connected Offshore Wind Farms

The Three-Phase Power Router and Its Operation with Matrix Converter toward Smart-Grid Applications

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