Offshore Wind Farm Integration and Frequency Support Control Utilizing Hybrid Multiterminal HVDC Transmission

Li, Chenghao; Zhan, Peng; Wen, Jinyu; Yao, Ming; Li, Naihu; Lee, Wei Jen

doi:10.1109/tia.2013.2293818

Cited by 73 publications

(39 citation statements)

References 17 publications

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“…Scheme 1: The polarity reversal of LCC is realized by auxiliary switches to achieve power reversal for the black-start of the hybrid four-terminal HVDC system [28]. Employing a similar method, the polarity of MMC in the inverter of the hybrid HVDC in this paper can also be reversed by auxiliary switches.…”

Section: Discussion Of Optional Methods To Reverse the Powermentioning

confidence: 99%

Investigation of a Hybrid HVDC System with DC Fault Ride-Through and Commutation Failure Mitigation Capability

Guo¹,

Zhao²,

Peng³

et al. 2015

Journal of Power Electronics

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A hybrid HVDC system that is composed of line commutated converter (LCC) at the rectifier side and voltage source converter (VSC) in series with LCC at the inverter side is studied in this paper. The start-up strategy, DC fault ride-through capability, and fault recovery strategy for the hybrid HVDC system are proposed. The steady state and dynamic performances under start-up, AC fault, and DC fault scenarios are analyzed based on a bipolar hybrid HVDC system. Furthermore, the immunity of the LCC inverter in hybrid HVDC to commutation failure is investigated. The simulation results in PSCAD/EMTDC show that the hybrid HVDC system exhibits favorable steady state and dynamic performances, in particular, low susceptibility to commutation failure, excellent DC fault ride-through, and fast fault recovery capability. Results also indicate that the hybrid HVDC system can be a good alternative for large-capacity power transmission over a long distance by overhead line.

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Section: Discussion Of Optional Methods To Reverse the Powermentioning

confidence: 99%

Investigation of a Hybrid HVDC System with DC Fault Ride-Through and Commutation Failure Mitigation Capability

Guo¹,

Zhao²,

Peng³

et al. 2015

Journal of Power Electronics

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“…As shown in [38] the SOGI-QSG settling time can be calculated based on (5). In this case a settling time of 100ms in front of a frequency step has been considered.…”

Section: Frequency Adaptive Of Dsogi-fllmentioning

confidence: 99%

“…In most of the RES based generation systems two-level VSCs in the low voltage range are used as the power conversion stage, due to good trade-offs between costperformance and controllability [2]- [4]. However, VSC topologies are also suitable for medium voltage applications, and are becoming widely used in high voltage direct current (VSC-HVDC) applications [5]- [7].…”

Section: Introductionmentioning

confidence: 99%

A comparative study of methods for estimating virtual flux at the point of common coupling in grid connected voltage source converters with LCL filter

Roslan

Suul

Luna

et al. 2016

2016 IEEE Energy Conversion Congress and Exposition (ECCE)

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Abstract-Grid synchronization based on Virtual Flux (VF) estimation allows for control of grid-connected power converter without depending on AC-voltage measurements. This is useful in voltage-sensor-less applications for reducing cost and complexity of the control hardware, and can be utilized in case of limited reliability or availability of voltage measurements at the intended point of synchronization to the grid. However, for Voltage Source Converters (VSC) with LCL filters, the influence of the capacitor current must be taken into account to ensure accurate VF estimation at the Point of Common Coupling (PCC) with the grid. This paper presents a comparative evaluation of three VF-based methods for grid synchronization of VSCs with LCL filters, with three different ways of obtaining the capacitor current. The VF estimation in the first method is based only on the measured converter currents. The second method includes capacitor voltage measurements used for estimating the capacitor currents, while the capacitor currents are measured in the third approach. Comparative results from time-domain simulations are presented, demonstrating good performance of the estimation and accurate control of the active and reactive power at the PCC with all three methods, as long as sufficiently accurate filter parameters and current measurements are available. However, the approach based on capacitor current measurements is sensitive to noise due to the high ripple current compared to the fundamental frequency current in the capacitors. The operation of a converter with VF-based grid synchronization including estimation of the capacitor current is demonstrated by experimental results, verifying the voltage sensor-less operation with LCL-filter.

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“…In [14]- [16], the LCC converters in the proposed systems operated as wind farm side rectifiers but such arrangements become less practical due to the various issues previously outlined. A hybrid HVDC configuration which uses a VSC to connect a wind farm and a LCC to operate as an inverter was presented and system studies under normal operation conditions were carried out [17]- [19]. However, system operation during large transients, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…offshore wind farms. In addition, they require larger footprint than VSCs and thus are more difficult for offshore installation.Considering the relative advantages of the LCC and VSC systems, a hybrid HVDC system comprising a VSC converter at one terminal and a LCC at the other terminal was proposed as a cost-effective solution for wind farm power transmission [14][15][16][17][18][19][20][21]. Such configuration can also be extended to multiterminal systems by adding new VSC and/or LCC converters to existing HVDC networks.…”

mentioning

confidence: 99%

Hybrid HVDC for Integrating Wind Farms With Special Consideration on Commutation Failure

Zeng

Yao

et al. 2016

IEEE Trans. Power Delivery

107

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This version is available at https://strathprints.strath.ac.uk/53537/ 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 Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output.This paper is a post-print of a paper submitted to and accepted for publication in IEEE Transaction on Power Delivery and is subject to Institution of Electrical and Electronic Engineering Copyright. The copy of record is available at IEEE Xplore Digital Library.1  Abstract-This paper presents the control and operation of a hybrid HVDC system comprising a wind farm side VSC rectifier and a grid side LCC inverter for integrating wind power. The configuration and operation principle of the hybrid HVDC system are described. Commutation failure in the LCC inverter during an AC network disturbance is considered and its impact on the hybrid system operation is analyzed. An enhanced control strategy for the LCC inverter at the grid side and an alternative MMC topology using mixed half-bridge and full-bridge modules considered for the rectifier at the wind farm side are proposed. Simulation results using Matlab/Simulink are presented to demonstrate the robust performance during LCC inverter commutation failure to validate the operation and recovery of the hybrid system with the proposed control strategy and MMC configuration.Index Terms-Commutation failure, hybrid HVDC, LCC, MMC, VSC, wind farm. I. INTRODUCTIONLarge wind farms both onshore (e.g. in China) and offshore (e.g. in Europe) have been developed with more being planned. Many of the large wind farms are located long distance away from the load centers or the available connection points. In cost-benefit terms, HVDC is likely to be preferable to HVAC technology for the main connection of large offshore wind farms when cable lengths exceed 80-120 km. For connecting large onshore remote wind farms using overhead lines, HVDC also provides significant benefits in terms of flexible control and improved system stability, and reduced cost for transmission distance over 600...

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Offshore Wind Farm Integration and Frequency Support Control Utilizing Hybrid Multiterminal HVDC Transmission

Cited by 73 publications

References 17 publications

Investigation of a Hybrid HVDC System with DC Fault Ride-Through and Commutation Failure Mitigation Capability

Investigation of a Hybrid HVDC System with DC Fault Ride-Through and Commutation Failure Mitigation Capability

A comparative study of methods for estimating virtual flux at the point of common coupling in grid connected voltage source converters with LCL filter

Hybrid HVDC for Integrating Wind Farms With Special Consideration on Commutation Failure

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