Asymmetrical Ride-Through and Grid Support in Converter-Interfaced DG Units Under Unbalanced Conditions

Shabestary, Masoud M.; Mohamed, Yasser Abdel-Rady I.

doi:10.1109/tie.2018.2835371

Cited by 58 publications

(37 citation statements)

References 29 publications

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“…4, remain. This is because after fault clearance, the boundary condition as depicted by (10) does not exist, which separates the sequence networks into the original three independent circuits as shown in Fig. 3.…”

Section: A Single-phase-to-ground Faultsmentioning

confidence: 99%

“…Particularly, it can maintain the voltage magnitudes of the healthy phases nearby the WTs around 1.0 pu, while minimize the voltage depression in the faulty phases. In [9,10], the potential impact of the control methods that exploit negative sequence components on onshore AC grid codes are further reviewed. However, the impact on power electronics dominated power systems such as AC network of HVDC connected OWFs need to be further investigated.…”

Section: Introductionmentioning

confidence: 99%

“…This approach aims to minimize the DC side voltage and current ripples. During severe asymmetric AC faults or when the ratio between the negative sequence voltage and the positive sequence voltage exceeds 70%, the negative sequence current controllers of the WTs and offshore HVDC converter are disabled [10]. Nonetheless, disabling of the negative sequence current controllers may expose semiconductor switches of the converters to excessive current stresses due to unrestrained negative sequence currents.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Control of Offshore MMC During Asymmetric Offshore AC Faults for Wind Power Transmission

Shi

Adam

et al. 2020

IEEE J. Emerg. Sel. Topics Power Electron.

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Section: A Single-phase-to-ground Faultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Control of Offshore MMC During Asymmetric Offshore AC Faults for Wind Power Transmission

Shi

Adam

et al. 2020

IEEE J. Emerg. Sel. Topics Power Electron.

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“…A few studies address the requirements for positive and negative-sequence current provision [2], [29], [30]. Here, a dual-sequence current provision strategy is proposed, but the method developed is not as flexible and general as FPNSC.…”

Section: Introductionmentioning

confidence: 99%

“…Further, in [29], the full converter capacity is not utilized. In [30], new curves for asymmetrical fault ride-through is proposed together with dynamic limits for the voltage parameters. Howbeit, this method proposes an improvement to existing grid code requirements and might, for that reason, not be the one to be considered for industrial applications that only consider currently applicable requirements.…”

Section: Introductionmentioning

confidence: 99%

Current Reference Generation Based on Next-Generation Grid Code Requirements of Grid-Tied Converters During Asymmetrical Faults

Taul

Wang

Davari

et al. 2020

IEEE J. Emerg. Sel. Topics Power Electron.

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Increased penetration of converter-based power generation has enforced system operators to require ancillary services from distributed generation in order to support the grid and improve the power system stability and reliability. Recent and next generation of grid codes require asymmetrical current provision during unbalanced faults for optimal voltage support. To address this, based on the highly used flexible positive and negative-sequence control method for current reference generation, this paper presents a general current reference strategy for asymmetrical fault control where a direct and explicit method is proposed to calculate power references and controller gains while simultaneously complying with converter current limitation and fulfilling the next generation of grid code requirements. The proposed method is tested for three distinct asymmetrical grid faults considering the requirements for dynamic voltage support of the recently revised German grid code as well as the next-generation grid codes. It is shown that the proposed method can improve the fault ride-through performance during asymmetrical faults compared to conventional solutions and comply with modern grid code requirements in a general and flexible manner.

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Application ofmulti‐stepbridge‐type fault current limiter for faultride‐throughcapability enhancement of permanent magnet synchronous generator‐based wind turbines

Firouzi

Nasiri

Benbouzid

et al. 2020

Int Trans Electr Energ Syst

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This study presents a new Multi‐Step Bridge‐type Fault Current Limiter (MSBFCL) for Fault Ride‐Through (FRT) capability enhancement of Permanent Magnet Synchronous Generator (PMSG)‐based wind turbine. In this structure, multi‐resistors in parallel with the Insulated‐Gate Bipolar Transistor (IGBT) switches are used to provide a controllable discrete step resistance. Considering the voltage sag depth at the Point of Common Coupling bus, the MSBFCL inserts the suitable limiting resistance in the faulted line path to limit short circuit current and boost the terminal voltage at determined value. Limiting the fault current based on multi‐step resistance prevents considerable overvoltage at the Grid Side Converter (GSC) of the PMSG and saturated operation mode of GSC control system in low voltage sag condition, which can lead to loss of controllability. The MSBFCL scheme is compared to the Superconducting Fault Current Limiter (SFCL) and Braking Chopper (BC) schemes. Simulations were carried out in Matlab/Simulink environment. Simulation results demonstrate that the MSBFCL provides a simple and effective solution to enhance the FRT capability of the PMSG in the whole range of voltage sag level and is advantageous over the SFCL and BC schemes.

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Asymmetrical Ride-Through and Grid Support in Converter-Interfaced DG Units Under Unbalanced Conditions

Cited by 58 publications

References 29 publications

Control of Offshore MMC During Asymmetric Offshore AC Faults for Wind Power Transmission

Control of Offshore MMC During Asymmetric Offshore AC Faults for Wind Power Transmission

Current Reference Generation Based on Next-Generation Grid Code Requirements of Grid-Tied Converters During Asymmetrical Faults

Application ofmulti‐stepbridge‐type fault current limiter for faultride‐throughcapability enhancement of permanent magnet synchronous generator‐based wind turbines

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