DC fault protection of diode rectifier unit based HVDC system connecting offshore wind farms

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

DC fault ride-through operations of the offshore wind farm connecting with diode rectifier unit (DRU) based HVDC link are presented in this paper. A voltage-error-dependent fault current injection is proposed to regulate the WT current during DC faults and to provide fault current. This contributes the control of the offshore AC voltage, which does not drop to zero but is remained relatively high to facilitate fast system recovery after clearance of a temporary DC fault. The WT converters operate on current limiting mode during DC faults and automatically restore normal operation after fault clearance. The full-bridge based modular multilevel converter (MMC) is adopted as the onshore station and its DC fault current control ability is explored to effectively suppress the fault current from the onshore station around zero, which reduces semiconductor losses and potential overcurrent risk of the MMC station. Simulation results confirm the robustness of the system to DC faults.

Conference

Conference2018 IEEE Power & Energy Society General Meeting
CountryUnited States
CityPortland
Period5/08/189/08/18

Fingerprint

Offshore wind farms
Electric fault currents
Diodes
Bridge clearances
Electric current control
Electric potential
Semiconductor materials
Recovery

Keywords

  • DC fault protection
  • diode rectifier unit based HVDC (DRU-HVDC)
  • full-bridge submodule
  • modular multilevel converter (MMC)
  • offshore wind farm

Cite this

Li, Rui ; Yu, Lujie ; Xu, Lie ; Adam, Grain Philip. / DC fault protection of diode rectifier unit based HVDC system connecting offshore wind farms. Paper presented at 2018 IEEE Power & Energy Society General Meeting, Portland, United States.5 p.
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title = "DC fault protection of diode rectifier unit based HVDC system connecting offshore wind farms",
abstract = "DC fault ride-through operations of the offshore wind farm connecting with diode rectifier unit (DRU) based HVDC link are presented in this paper. A voltage-error-dependent fault current injection is proposed to regulate the WT current during DC faults and to provide fault current. This contributes the control of the offshore AC voltage, which does not drop to zero but is remained relatively high to facilitate fast system recovery after clearance of a temporary DC fault. The WT converters operate on current limiting mode during DC faults and automatically restore normal operation after fault clearance. The full-bridge based modular multilevel converter (MMC) is adopted as the onshore station and its DC fault current control ability is explored to effectively suppress the fault current from the onshore station around zero, which reduces semiconductor losses and potential overcurrent risk of the MMC station. Simulation results confirm the robustness of the system to DC faults.",
keywords = "DC fault protection, diode rectifier unit based HVDC (DRU-HVDC), full-bridge submodule, modular multilevel converter (MMC), offshore wind farm",
author = "Rui Li and Lujie Yu and Lie Xu and Adam, {Grain Philip}",
note = "{\circledC} 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.; 2018 IEEE Power & Energy Society General Meeting ; Conference date: 05-08-2018 Through 09-08-2018",
year = "2018",
month = "12",
day = "24",
doi = "10.1109/PESGM.2018.8586510",
language = "English",

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Li, R, Yu, L, Xu, L & Adam, GP 2018, 'DC fault protection of diode rectifier unit based HVDC system connecting offshore wind farms' Paper presented at 2018 IEEE Power & Energy Society General Meeting, Portland, United States, 5/08/18 - 9/08/18, . https://doi.org/10.1109/PESGM.2018.8586510

DC fault protection of diode rectifier unit based HVDC system connecting offshore wind farms. / Li, Rui; Yu, Lujie; Xu, Lie; Adam, Grain Philip.

2018. Paper presented at 2018 IEEE Power & Energy Society General Meeting, Portland, United States.

Research output: Contribution to conferencePaper

TY - CONF

T1 - DC fault protection of diode rectifier unit based HVDC system connecting offshore wind farms

AU - Li, Rui

AU - Yu, Lujie

AU - Xu, Lie

AU - Adam, Grain Philip

N1 - © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

PY - 2018/12/24

Y1 - 2018/12/24

N2 - DC fault ride-through operations of the offshore wind farm connecting with diode rectifier unit (DRU) based HVDC link are presented in this paper. A voltage-error-dependent fault current injection is proposed to regulate the WT current during DC faults and to provide fault current. This contributes the control of the offshore AC voltage, which does not drop to zero but is remained relatively high to facilitate fast system recovery after clearance of a temporary DC fault. The WT converters operate on current limiting mode during DC faults and automatically restore normal operation after fault clearance. The full-bridge based modular multilevel converter (MMC) is adopted as the onshore station and its DC fault current control ability is explored to effectively suppress the fault current from the onshore station around zero, which reduces semiconductor losses and potential overcurrent risk of the MMC station. Simulation results confirm the robustness of the system to DC faults.

AB - DC fault ride-through operations of the offshore wind farm connecting with diode rectifier unit (DRU) based HVDC link are presented in this paper. A voltage-error-dependent fault current injection is proposed to regulate the WT current during DC faults and to provide fault current. This contributes the control of the offshore AC voltage, which does not drop to zero but is remained relatively high to facilitate fast system recovery after clearance of a temporary DC fault. The WT converters operate on current limiting mode during DC faults and automatically restore normal operation after fault clearance. The full-bridge based modular multilevel converter (MMC) is adopted as the onshore station and its DC fault current control ability is explored to effectively suppress the fault current from the onshore station around zero, which reduces semiconductor losses and potential overcurrent risk of the MMC station. Simulation results confirm the robustness of the system to DC faults.

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KW - diode rectifier unit based HVDC (DRU-HVDC)

KW - full-bridge submodule

KW - modular multilevel converter (MMC)

KW - offshore wind farm

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