Protection schemes for DFIG considering rotor current and DC-link voltage

Okedu, Kenneth E.; Muyeen, S. M.; Takahashi, Rion; Tamura, Junji

doi:10.1109/icems.2011.6073453

Cited by 20 publications

(15 citation statements)

References 11 publications

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“…The chopper facilitates a voltage-raising action from the converter terminals, enabling the limitation of the DC-link discharges, and a fast recovery of the DC-link voltage. The protective device in this scheme is a simple chopper circuit and a resistance [7]. A control signal will activate the IGBT when the DC-link voltage exceeds its nominal value, and thus, the chopper is turned on and the energy is dissipated by the internal resistance.…”

Section: ) Dc-choppermentioning

confidence: 99%

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Sizing of the series dynamic breaking resistor in a doubly fed induction generator wind turbine

Soliman

Wang

Zhou

et al. 2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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This paper investigates the effect of Series Dynamic Breaking Resistor (SDBR) sizing on a Doubly Fed Induction Generator (DFIG) based wind power conversion system. The boundary of the SDBR value is firstly derived by taking into account the controllability of the rotor side converter and the maximum allowable voltage of the stator. Then the impact of the SDBR value on the rotor current, stator voltage, DC-link voltage, reactive power capability and introduced power loss during voltage sag operation is evaluated by simulation. The presented study enables a trade-off sizing of the SDBR among the above performance factors.

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Section: ) Dc-choppermentioning

confidence: 99%

“…The rotor current, stator voltage, DC-link voltage, and reactive power capability of a 1.5 MW DFIG system are studied under different values of SDBR within the boundary defined by (7). A worse case with full voltage dip is chosen in the study (i.e., p = 1).…”

Section: The Impact Of Sdbr Sizing On a 15 Mw Dfig Wind Turbinementioning

confidence: 99%

Sizing of the series dynamic breaking resistor in a doubly fed induction generator wind turbine

Soliman

Wang

Zhou

et al. 2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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“…Two schemes to limit the rotor current of the DFIG during a grid fault, which work cooperatively with the DC-link chopper, are proposed. The first scheme is based on the coordinated control of the d and q axis rotor currents in the RSC of the DFIG with using a supplementary rotor current (SRC) controller [31,32]. A small value (0.1pu) of series dynamic braking resistor (SDBR) connected to the stator of the DFIG is used in the second scheme [33,34].…”

Section: Proposed Protection Scheme Of Dfigmentioning

confidence: 99%

Wind Farms Fault Ride Through Using DFIG With New Protection Scheme

Okedu

Muyeen

Takahashi

et al. 2012

IEEE Trans. Sustain. Energy

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205

110

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This paper proposes a control strategy of doubly fed induction generators (DFIGs) with new protection schemes for enhancing fault ride through capability of wind farms composed of DFIGs and induction generators (IGs). Since the DFIGs will be stressed or overloaded in the process of stabilizing the wind farm during a grid fault, it is paramount to consider a protection scheme for the DFIG, in order to protect its power converters. Two schemes, the DC-link chopper-controlled braking resistor with the supplementary rotor current (SRC) control of the rotor side converter of the DFIG and series dynamic braking resistor (SDBR) connected to the stator of the DFIG, are proposed and compared. Merits and drawbacks of both schemes are highlighted as well. The simulation results in PSCAD/EMTDC show that the two proposed schemes can eliminate the need for an expensive crowbar switch in the rotor circuit, because both could limit the rotor current of the DFIG within its nominal value during a grid fault. Finally, considering the overall system performance, the latter is recommended.

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“…The constant penetration of wind farms that are equipped with wind turbines into existing grid connected network, would definitely affect the frequency and stability of the entire power system. Power electronics technology is the main technology that enables the connection of renewable energy sources like wind and solar into the grid system [1][2][3]. They are used to interface the generated energy into the grid.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Frequency of Grid-connected Wind Farm using Energy Capacitor System and Trap RC Shunt Damper Strategies

Okedu¹

2018

Tr Ren Energy

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In this paper, a combination of the conventional energy capacitor system and a proposed two-trap Resistor Capacitor (RC) shunt damper circuitry is used to stabilize a grid network made up of fixed speed wind turbines, steam turbines and hydro turbines. The energy storage system is connected to the terminals of the wind farm and has the capability of stabilizing the grid network during periods of wind speed change. The two-trap damper has the ability to mitigate the mechanical vibration of the wind turbine and increase its output and rotor speed acceleration during disturbances, so the turbine speed is reduced. Simulations were run using Power System Computer Aided Design and Electromagnetic Transient Including DC (PSCAD/EMTDC) environment, for scenarios where grid frequency control was not implemented and when frequency control was employed using the energy storage device. A further investigation was carried out in enhancing the performance of the grid network considering the proposed two-trap shunt DC damper control topology. The results show the improved performance of the variables of the wind turbine and the entire grid network during dynamics, due to the coordinated control strategies of the two-trap RC circuit and the energy capacitor system employed.

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Protection schemes for DFIG considering rotor current and DC-link voltage

Cited by 20 publications

References 11 publications

Sizing of the series dynamic breaking resistor in a doubly fed induction generator wind turbine

Sizing of the series dynamic breaking resistor in a doubly fed induction generator wind turbine

Wind Farms Fault Ride Through Using DFIG With New Protection Scheme

Enhancing Frequency of Grid-connected Wind Farm using Energy Capacitor System and Trap RC Shunt Damper Strategies

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