Dynamic Analysis of a Modular Multilevel Converter Based VSCHVDC System Incorporating Transformer Magnetisation Characteristics

J. Vaheeshan; M. Barnes; R. Shuttleworth

Dynamic Analysis of a Modular Multilevel Converter Based VSCHVDC System Incorporating Transformer Magnetisation Characteristics

J. Vaheeshan, M. Barnes, R. Shuttleworth

Research output: Chapter in Book/Conference proceeding › Conference contribution › peer-review

Abstract

When an HVDC system is subjected to AC side short circuitfaults, the transformer core might be driven to saturation atfault recovery due to flux offset. The saturation will thereforecause the flow of inrush currents. In this paper, dynamicmodels of a MMC based VSC-HVDC system incorporatingtransformer magnetisation characteristics are derived andverified. Using disturbance sensitivity functions, the impactof attenuation of inrush currents due to different locations ofcurrent sensors (of inner current controller) is investigated. Itis shown that placing the current sensor at the converter sideof the transformer enable the inrush currents to attenuatefaster and prevents the converter from overcurrent exposure,allowing it to more successfully ride-through faults.

Original language	English
Title of host publication	host publication
Publisher	IEEE
Publication status	Published - Jun 2015
Event	IEEE PEDS 2015 - Sydney, Australia Duration: 9 Jun 2015 → 12 Jun 2015

Conference

Conference	IEEE PEDS 2015
City	Sydney, Australia
Period	9/06/15 → 12/06/15

Keywords

HVDC transformer, saturation, inrush current, current transformer, fault ride through

Cite this

@inproceedings{992f1472df5c45e686f2712b9edbde19,

title = "Dynamic Analysis of a Modular Multilevel Converter Based VSCHVDC System Incorporating Transformer Magnetisation Characteristics",

abstract = "When an HVDC system is subjected to AC side short circuitfaults, the transformer core might be driven to saturation atfault recovery due to flux offset. The saturation will thereforecause the flow of inrush currents. In this paper, dynamicmodels of a MMC based VSC-HVDC system incorporatingtransformer magnetisation characteristics are derived andverified. Using disturbance sensitivity functions, the impactof attenuation of inrush currents due to different locations ofcurrent sensors (of inner current controller) is investigated. Itis shown that placing the current sensor at the converter sideof the transformer enable the inrush currents to attenuatefaster and prevents the converter from overcurrent exposure,allowing it to more successfully ride-through faults.",

keywords = "HVDC transformer, saturation, inrush current, current transformer, fault ride through",

author = "J. Vaheeshan and M. Barnes and R. Shuttleworth",

year = "2015",

month = jun,

language = "English",

booktitle = "host publication",

publisher = "IEEE",

address = "United States",

note = "IEEE PEDS 2015 ; Conference date: 09-06-2015 Through 12-06-2015",

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T1 - Dynamic Analysis of a Modular Multilevel Converter Based VSCHVDC System Incorporating Transformer Magnetisation Characteristics

AU - Vaheeshan, J.

AU - Barnes, M.

AU - Shuttleworth, R.

PY - 2015/6

Y1 - 2015/6

N2 - When an HVDC system is subjected to AC side short circuitfaults, the transformer core might be driven to saturation atfault recovery due to flux offset. The saturation will thereforecause the flow of inrush currents. In this paper, dynamicmodels of a MMC based VSC-HVDC system incorporatingtransformer magnetisation characteristics are derived andverified. Using disturbance sensitivity functions, the impactof attenuation of inrush currents due to different locations ofcurrent sensors (of inner current controller) is investigated. Itis shown that placing the current sensor at the converter sideof the transformer enable the inrush currents to attenuatefaster and prevents the converter from overcurrent exposure,allowing it to more successfully ride-through faults.

AB - When an HVDC system is subjected to AC side short circuitfaults, the transformer core might be driven to saturation atfault recovery due to flux offset. The saturation will thereforecause the flow of inrush currents. In this paper, dynamicmodels of a MMC based VSC-HVDC system incorporatingtransformer magnetisation characteristics are derived andverified. Using disturbance sensitivity functions, the impactof attenuation of inrush currents due to different locations ofcurrent sensors (of inner current controller) is investigated. Itis shown that placing the current sensor at the converter sideof the transformer enable the inrush currents to attenuatefaster and prevents the converter from overcurrent exposure,allowing it to more successfully ride-through faults.

KW - HVDC transformer, saturation, inrush current, current transformer, fault ride through

M3 - Conference contribution

BT - host publication

PB - IEEE

T2 - IEEE PEDS 2015

Y2 - 9 June 2015 through 12 June 2015

ER -

Dynamic Analysis of a Modular Multilevel Converter Based VSCHVDC System Incorporating Transformer Magnetisation Characteristics

Abstract

Conference

Keywords

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