Control of Multilevel Converter Driving Variable Speed Wind Turbine in Case of Grid Disturbances

Ivanovic, Zoran; Vekcic, Marko; Grabić, Stevan; Katić, Vladimir

doi:10.1109/epepemc.2006.4778627

Cited by 10 publications

(7 citation statements)

References 3 publications

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“…The second control scheme proposes an instantaneous active and reactive power control without filtering in the control loops. The advantages of the proposed control algorithms are high controller bandwidth and decoupled control of active and reactive power which, unlike the method in [14], exhibits no time-varying components. The side effect, however, is a nonsinusoidal grid-current waveform for the duration of unbalanced grid voltage.…”

Section: Introductionmentioning

confidence: 94%

“…For reliability and converter protection reasons, this should not be permitted. Therefore, the modified DVCC with imposed current limitation (DVCC_CL) is recommended [14]. The control structure of such an improved system is shown in Fig.…”

Section: Modified Dvcc With Current Limitationmentioning

confidence: 99%

“…However, during severe voltage sags, there is no control over the line currents' magnitudes, so they could reach values several times higher than nominal. In order to overcome this undesirable effect, a modified DVCC with grid-current limitation [14] and output-power reduction [15] was proposed. The drawbacks of all these solutions are their inability to eliminate reactive power oscillations at twice grid frequency altogether with active power oscillations.…”

Section: Introductionmentioning

confidence: 99%

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HIL Evaluation of Power Flow Control Strategies for Energy Storage Connected to Smart Grid Under Unbalanced Conditions

Ivanovic

Adžić

Vekić

et al. 2012

IEEE Trans. Power Electron.

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This paper proposes two power flow control algorithms for a grid-connected voltage source converter used as part of the energy storage for a smart grid under unbalanced voltage conditions. Both algorithms are improvements of the dual vector current control algorithm (DVCC). The first proposed algorithm, DVCC_CL, optimizes the method of limiting phase currents for the duration of voltage unbalance. The second proposed algorithm, DVCC_HB, provides high bandwidth control of active and reactive power. Which of the two proposed algorithms is the better choice depends on the grid code requirements and the constraints imposed by the particular energy storage system which the inverter connects to the grid. The operation of both algorithms was verified within the framework of an ultralow-latency hardware-in-the-loop emulator, which makes accurate analysis of converter behavior safe and easy for any grid conditions. Index Terms-Current control, energy storage, hardware-inthe-loop (HIL), power control, power quality, smart grid.

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Section: Introductionmentioning

confidence: 94%

Section: Modified Dvcc With Current Limitationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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HIL Evaluation of Power Flow Control Strategies for Energy Storage Connected to Smart Grid Under Unbalanced Conditions

Ivanovic

Adžić

Vekić

et al. 2012

IEEE Trans. Power Electron.

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“…The model of the GC converter DQPP-DQNN control is thus illustrated on figure8 knowing that the filtering of the currents on the side grid [7] is established in accordance with the model schematized on figure9. …”

Section: (L3)mentioning

confidence: 99%

Control of a double fed induction generator (DFIG) connected to an unbalanced electrical grid

Chebbi

Jouini

Jemai

et al. 2010

2010 IEEE International Conference on Systems, Man and Cybernetics

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The electrical supply grids can be the seat of an unbalance of voltage system following the single-phase loads which are connected and which are not uniformly distributed on the three phases.We propose, in the present paper a new approach to control a power system based on a double fed induction generator (DFIG) connected to an electrical grid likely to be affected of an unbalance voltage, via a back-to-back converter (AC/AC). The head aim is to guarantee a better quality of the energy exchanged between the power system and the unbalanced grid.

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“…For instance, in [9] and [10], the limitation is carried out taking into consideration the maximum current value in the current reference computation and assuring that the current vector amplitude does not surpass the maximum value. However, according to [11], limiting phase currents instead of current vector amplitude can increase the transferred reactive power up to 15%.…”

Section: Introductionmentioning

confidence: 99%

Online Reference Limitation Method of Shunt-Connected Converters to the Grid to Avoid Exceeding Voltage and Current Limits Under Unbalanced Operation—Part I: Theory

Milicua

Abad

Vidal

2015

IEEE Trans. Energy Convers.

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This paper focuses the analysis around a gridconnected converter that operates under unbalanced voltage and current conditions. Two different scenarios have been selected to validate the proposed algorithms. In the first scenario, the converter operates as a reactive power compensator, exchanging reactive power with the grid, and minimizing the dc bus voltage oscillations. The second scenario is more challenging, since it operates as a load balancer. In this application, the unbalanced current consumption of the load is compensated by the converter, exchanging positive and negative sequence currents with the grid. Another objective in this second scenario is to compensate the reactive power of the unbalanced load. It is important to highlight that in both scenarios, any maximum limit of the converter can be exceeded due to the specific unbalanced voltage and current conditions. Three variables are considered critical for the converter: 1) output ac current limit; 2) output ac voltage limit; and 3) dc bus voltage oscillation limit. Thus, this paper proposes a control method, which limits online the reactive power reference in the first scenario and the exchanged current references in the second scenario in order not to exceed any of the mentioned critical variables. The corresponding experimental results are shown in Part II of this paper so as to validate the limitation algorithm obtained by means of the mathematical analysis carried out in Part I.

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Control of Multilevel Converter Driving Variable Speed Wind Turbine in Case of Grid Disturbances

Cited by 10 publications

References 3 publications

HIL Evaluation of Power Flow Control Strategies for Energy Storage Connected to Smart Grid Under Unbalanced Conditions

HIL Evaluation of Power Flow Control Strategies for Energy Storage Connected to Smart Grid Under Unbalanced Conditions

Control of a double fed induction generator (DFIG) connected to an unbalanced electrical grid

Online Reference Limitation Method of Shunt-Connected Converters to the Grid to Avoid Exceeding Voltage and Current Limits Under Unbalanced Operation—Part I: Theory

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