The Experts below are selected from a list of 3327 Experts worldwide ranked by ideXlab platform
Dheeman Chatterjee - One of the best experts on this subject based on the ideXlab platform.
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Voltage Collapse Prevention in Doubly Fed Induction Generator Based Wind Farm Connected Power System
INAE Letters, 2016Co-Authors: Srayashi Konar, Dheeman ChatterjeeAbstract:In this work, the doubly-fed induction generator (DFIG), rotor side Converter (RSC) is controlled to regulate its reactive power output. A brief comparative study has been carried out between two different RSG control techniques, based on their ability to restore voltage stability of a power system. From this study the better DFIG–RSC control strategy has been identified. The results are tested in IEEE-14 bus system and simulated in MATLAB.
Hossein Madadi Kojabadi - One of the best experts on this subject based on the ideXlab platform.
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direct power control of dfig based on discrete space vector modulation
Renewable Energy, 2010Co-Authors: Mohammad Verij Kazemi, Ahmad Sadeghi Yazdankhah, Hossein Madadi KojabadiAbstract:This paper presents a new direct power control (DPC) strategy for a double fed induction generator (DFIG) based wind energy generation system. Switching vectors for rotor side Converter were selected from the optimal switching table using the estimated stator flux position and the errors of the active and reactive power. A few number of voltage vectors may cause undesired power and stator current ripple. In this paper the increased number of voltage vectors with application of the Discrete Space Vector Modulation (DSVM) will be presented. Then a new switching table in supersynchronous and subsynchronous frames will be proposed. Simulation results of a 2MW DFIG system demonstrate the effectiveness and robustness of the proposed control strategy during variations of active and reactive power, machine parameters, and wind speed.
Frede Blaabjerg - One of the best experts on this subject based on the ideXlab platform.
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A Modified Direct Power Control Scheme for Rotor Side Converter of DFIG for Grid and Wind Perturbation Conditions
2018Co-Authors: Karthik Tamvada, Frede Blaabjerg, Umashankar Subramaniyan, Sanjeevikumar Padmanaban, Pierluigi Siano, Zbigniew LeonowiczAbstract:This paper presents an improved direct power control scheme for rotor side Converter of wind energy system using doubly fed induction generator (DFIG) under grid disturbance of voltage sag and variable wind conditions. This work simplifies the control solution by utilizing a simple reference generation strategy of stator power for enhanced operation. The performance of the proposed strategy is investigated based on the time-domain simulation of a wind farm composed of six 1.5 MW DFIG based wind turbines. Detailed analysis of the results infer that the proposed control shows robust performance under the grid and wind speed disturbances.
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Mission profile resolution effects on lifetime estimation of doubly-fed induction generator power Converter
2017 IEEE Southern Power Electronics Conference (SPEC), 2017Co-Authors: Guanguan Zhang, Dao Zhou, Frede Blaabjerg, Jian YangAbstract:In the wind energy generation system, mission profiles are complicated, which range from seconds to years. In order to estimate the consumed lifetime of the power Converter, wind speed profiles with the time resolution of 1 hour, 1 second and 0.5 millisecond are studied in this paper, and the corresponding thermal modeling of power semiconductors are discussed. Accordingly, effects of different mission profiles on the consumed lifetime of the power Converter are evaluated. In the above three thermal cycles, the IGBT of the grid-side Converter and the diode of the Rotor-Side Converter are more fragile, and the total consumed lifetimes are higher. Moreover, the short-term thermal cycles with milliseconds resolution induce the unbalance of the lifetime between the diode and IGBT of the grid-side Converter, while thermal cycles with hour, second, and millisecond resolution consumes the similar lifetime of the power components in the Rotor-Side Converter. Furthermore, it is concluded that the lifetime of power components reduces with the increased time resolution, especially for the Rotor-Side Converter.
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Modern control strategies of doubly-fed induction generator based wind turbine system
Chinese Journal of Electrical Engineering, 2016Co-Authors: Dao Zhou, Yipeng Song, Frede BlaabjergAbstract:A doubly-fed induction generator(DFIG) based configuration is still preferred by wind turbine manufacturers due to the cost-effective power Converter and independent control of the active power and reactive power. To cope with stricter grid codes(e.g. reactive power compensation, low voltage ride-through operation, as well as steady and safe operation during long-term distorted grid), control strategies are continuously evolving. This paper starts with a control strategy using the combined reactive power compensation from both the back-to-back power Converters for their optimized lifetime distribution under normal grid conditions. Afterwards, an advanced demagnetizing control is proposed to keep the minimum thermal stress of the Rotor-Side Converter in the case of the short-term grid fault. A modularized control strategy of the DFIG system under unbalanced and distorted grid voltage is discussed, with the control targets of the smooth active and reactive power or the balanced and sinusoidal current of the Rotor-Side Converter and the grid-side Converter. Finally, a bandwidth based repetitive controller is evaluated to improve the DFIG system's robustness against grid frequency deviation.
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Reduced Cost of Reactive Power in Doubly Fed Induction Generator Wind Turbine System With Optimized Grid Filter
IEEE Transactions on Power Electronics, 2015Co-Authors: Dao Zhou, Frede Blaabjerg, Toke Franke, Michael TonnesAbstract:The modern grid requirement has caused that the wind power system behaves more like conventional rotating generators, and it is able to support certain amount of the reactive power. For a typical doubly fed induction generator (DFIG) wind turbine system, the reactive power can be supported either through the Rotor-Side Converter or the grid-side Converter. This paper first compares the current ripples and supportive reactive power ranges between the conventional L and optimized LCL filter, if the reactive power is injected from the grid-side Converter. Then, the loss distribution is evaluated both for the generator and the wind power Converter in terms of the reactive power done by the Rotor-Side Converter or the grid-side Converter with various grid filters. Afterward, the annual energy loss is also estimated based on yearly wind profile. Finally, experimental results of the loss distribution are performed in a down-scaled DFIG system. It is concluded that overexcited reactive power injected from the grid-side Converter has lower energy loss per year compared to the overexcited reactive power covered by the Rotor-Side Converter. Furthermore, it is also found that the annual energy loss could even become lower with the optimized filter and thereby more energy production for the wind turbine.
Srayashi Konar - One of the best experts on this subject based on the ideXlab platform.
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Voltage Collapse Prevention in Doubly Fed Induction Generator Based Wind Farm Connected Power System
INAE Letters, 2016Co-Authors: Srayashi Konar, Dheeman ChatterjeeAbstract:In this work, the doubly-fed induction generator (DFIG), rotor side Converter (RSC) is controlled to regulate its reactive power output. A brief comparative study has been carried out between two different RSG control techniques, based on their ability to restore voltage stability of a power system. From this study the better DFIG–RSC control strategy has been identified. The results are tested in IEEE-14 bus system and simulated in MATLAB.
Mohammad Verij Kazemi - One of the best experts on this subject based on the ideXlab platform.
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direct power control of dfig based on discrete space vector modulation
Renewable Energy, 2010Co-Authors: Mohammad Verij Kazemi, Ahmad Sadeghi Yazdankhah, Hossein Madadi KojabadiAbstract:This paper presents a new direct power control (DPC) strategy for a double fed induction generator (DFIG) based wind energy generation system. Switching vectors for rotor side Converter were selected from the optimal switching table using the estimated stator flux position and the errors of the active and reactive power. A few number of voltage vectors may cause undesired power and stator current ripple. In this paper the increased number of voltage vectors with application of the Discrete Space Vector Modulation (DSVM) will be presented. Then a new switching table in supersynchronous and subsynchronous frames will be proposed. Simulation results of a 2MW DFIG system demonstrate the effectiveness and robustness of the proposed control strategy during variations of active and reactive power, machine parameters, and wind speed.
