Study on FRT compliance of VSC-HVDC connected offshore wind plants during AC faults including requirements for the negative sequence current control

Ndreko, Mario; Popov, Marjan; Meijden, Mart A. M. M. van der

doi:10.1016/j.ijepes.2016.08.009

Cited by 33 publications

(22 citation statements)

References 18 publications

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“…Additional challenges may arise regarding the frequency measurement during disturbances and the tuning of the corresponding controllers. As far as the emulated short-circuit strategy is concerned [18,21,16], the rapid increase of the DC link voltage is monitored and the amplitude modulation index is appropriately reduced, which results in a decrease of the HVDC converter station voltage, consequently allowing the WFs to detect the fault on the offshore side. Nevertheless, in such case high transient currents are expected to be generated at the beginning and end of the fault, which could potentially harm the semiconductor devices of the 3 offshore HVDC converters.…”

Section: Review Of Existing Methodsmentioning

confidence: 99%

A new fault-ride-through strategy for MTDC networks incorporating wind farms and modular multi-level converters

Tzelepis

Rousis

Booth

et al. 2017

International Journal of Electrical Power & Energy Systems

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This version is available at https://strathprints.strath.ac.uk/60571/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the (0)

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Section: Review Of Existing Methodsmentioning

confidence: 99%

A new fault-ride-through strategy for MTDC networks incorporating wind farms and modular multi-level converters

Tzelepis

Rousis

Booth

et al. 2017

International Journal of Electrical Power & Energy Systems

View full text Add to dashboard Cite

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“…It is to modulate the WTGs active power reference as a function of OWF's frequency by providing inertial and primary frequency response. On the other hand, undesired controlled voltage reduction is performed in the voltage modulation strategy to exploit the FRT capability of the modern WTGs [6], [7], [12], [14], [16], [18]- [20]. In more details, during voltage dips, WTGs should assign the converters current capacity allocation priority to the reactive current for grid voltage support and grid code following.…”

Section: B Literature Reviewmentioning

confidence: 99%

“…Two available FD-PSACR and PSVD-PSACR based FRT control strategies are also simulated to establish comparative simulations [14], [20]. The key results are summarized in Fig.…”

Section: E Comparative Simulationsmentioning

confidence: 99%

A Comprehensive VSG-Based Onshore FRT Control Strategy for OWFs With VSC-MT-HVDC Transmission

et al. 2021

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This paper proposes a communication-free control strategy at the offshore wind farm (OWF) level to enhance onshore fault ride-through (FRT) grid code compliance of the voltage source converter (VSC)-based multi-terminal high voltage direct current (MT-HVDC) grid. In this proposal, the emerging virtual synchronous generator (VSG) concept is employed to equip the Type 4 wind turbine generator (WTG)s with inherent grid forming ability. Accordingly, it is proposed to switch the offshore HVDC converters control mode from grid forming to grid feeding during onshore FRT period to realize direct wind power in-feed reduction as a function of the severity of MT-HVDC grid's overvoltage. The related dynamics are mainly characterized by the high-speed current control loop, so improved OWF response is achieved during onshore FRT period as conventional voltage/frequency modulation strategies are not employed. New analysis/amendments are also proposed to study and improve the transient active power reduction sharing between the WTGs in first few power cycles under wind wake effect. Finally, with the objective of a smooth transfer of HVDC converters and WTGs in several proposed operation states, a set of state machines are proposed considering whole WTG's dynamics. Comprehensive time-domain simulations are performed with averaged electromagnetic transient models to demonstrate the improved onshore FRT behavior in terms of minimizing the electrical stress at both MT-HVDC grid and OWF levels. INDEX TERMS Fault-ride-through, multi-terminal HVDC grid, offshore wind farm, power reduction method, type 4 WTG, virtual synchronous generator.

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“…For example, when the negative sequence current is suppressed as the control target of the grid-connected inverter, there is no negative sequence current in the fault current of the photovoltaic power station side. A lesser concern is that this suppression of negative sequence current will cause the phase selection components of the line protection to be affected, which may cause risks, such as protection phase selection errors, and thus affect important functions, such as reclosing and protection ranging [2].…”

Section: Introductionmentioning

confidence: 99%

LS-Solar-PV System Impact on Line Protection

et al. 2019

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Large-scale photovoltaic power station access to the grid will profoundly change the fault current characteristics of the power station’s outgoing lines. This change results in adaptive problems in traditional protection phase selection components, which may cause incorrect actions in reclosing, protection ranging, and distance protection. Based on the fault current characteristics of the large-scale photovoltaic power station transmission line, this paper analyzes the adaptability of the phase current difference mutation and the sequence component phase selection component in protecting the Photovoltaic (PV) power plant side of the transmission line. Based on the fault current analytical formula, the phase relationship between the phase current difference and the current sequence component under different control targets, such as suppressing negative sequence current, suppressing the active power fluctuation, and suppressing the reactive power fluctuation, is derived. The operational performances of the phase–phase current difference of the abrupt phase selection component and the sequence component phase selection component of the power station side are degraded, which may cause incorrect operation of the phase selection component. Based on the actual engineering parameters of a PV power plant, a simulation model was built in Power System Computer Aided Design (PSCAD) to verify the correctness of the theoretical analysis.

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Study on FRT compliance of VSC-HVDC connected offshore wind plants during AC faults including requirements for the negative sequence current control

Cited by 33 publications

References 18 publications

A new fault-ride-through strategy for MTDC networks incorporating wind farms and modular multi-level converters

A new fault-ride-through strategy for MTDC networks incorporating wind farms and modular multi-level converters

A Comprehensive VSG-Based Onshore FRT Control Strategy for OWFs With VSC-MT-HVDC Transmission

LS-Solar-PV System Impact on Line Protection

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