Design of DC-line terminating inductors for enhancement of protective functions in MTDC grids

Dimitrios Tzelepis, Adam Dysko, Campbell Booth, Sohrab Mirsaeidi, Xinzhou Dong

Research output: Contribution to journalArticle

Abstract

This study presents a detailed DC-side fault analysis considering inductive termination of lines within a high-voltage multi-terminal direct current (MTDC) grid. The analysis aims to provide design guidelines for DC-side inductors, taking into account important aspects of protection such as the required speed of operation of relays and the performance characteristics of current interruption devices (i.e. of DC circuit breakers). Moreover, the impact of current limiting inductors on the fault signatures is investigated. In particular, it has been found that DC-side inductors not only limit the fault current level, but also the resulting signatures in voltage and current, can assist to enhance the speed of operation, stability and selectivity of protective functions for DC-side faults. The analysis has been extended to include the impact of inductive termination on fast transient phenomena known as travelling waves. Specifically, DC-side inductors can form a significant reflection boundary for the generated travelling waves. A deeper insight into the faults has been achieved by utilising wavelet transform.

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Electric fault currents
Electric circuit breakers
Electric potential
Wavelet transforms

Keywords

  • DC-line
  • multi-terminal direct current
  • HVDC

Cite this

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title = "Design of DC-line terminating inductors for enhancement of protective functions in MTDC grids",
abstract = "This study presents a detailed DC-side fault analysis considering inductive termination of lines within a high-voltage multi-terminal direct current (MTDC) grid. The analysis aims to provide design guidelines for DC-side inductors, taking into account important aspects of protection such as the required speed of operation of relays and the performance characteristics of current interruption devices (i.e. of DC circuit breakers). Moreover, the impact of current limiting inductors on the fault signatures is investigated. In particular, it has been found that DC-side inductors not only limit the fault current level, but also the resulting signatures in voltage and current, can assist to enhance the speed of operation, stability and selectivity of protective functions for DC-side faults. The analysis has been extended to include the impact of inductive termination on fast transient phenomena known as travelling waves. Specifically, DC-side inductors can form a significant reflection boundary for the generated travelling waves. A deeper insight into the faults has been achieved by utilising wavelet transform.",
keywords = "DC-line, multi-terminal direct current, HVDC",
author = "Dimitrios Tzelepis and Adam Dysko and Campbell Booth and Sohrab Mirsaeidi and Xinzhou Dong",
year = "2018",
month = "7",
day = "18",
doi = "10.1049/joe.2018.0266",
language = "English",
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journal = "The Journal of Engineering",
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Design of DC-line terminating inductors for enhancement of protective functions in MTDC grids. / Tzelepis, Dimitrios; Dysko, Adam; Booth, Campbell; Mirsaeidi, Sohrab ; Dong, Xinzhou .

In: Journal of Engineering, 18.07.2018, p. 1-6.

Research output: Contribution to journalArticle

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T1 - Design of DC-line terminating inductors for enhancement of protective functions in MTDC grids

AU - Tzelepis, Dimitrios

AU - Dysko, Adam

AU - Booth, Campbell

AU - Mirsaeidi, Sohrab

AU - Dong, Xinzhou

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N2 - This study presents a detailed DC-side fault analysis considering inductive termination of lines within a high-voltage multi-terminal direct current (MTDC) grid. The analysis aims to provide design guidelines for DC-side inductors, taking into account important aspects of protection such as the required speed of operation of relays and the performance characteristics of current interruption devices (i.e. of DC circuit breakers). Moreover, the impact of current limiting inductors on the fault signatures is investigated. In particular, it has been found that DC-side inductors not only limit the fault current level, but also the resulting signatures in voltage and current, can assist to enhance the speed of operation, stability and selectivity of protective functions for DC-side faults. The analysis has been extended to include the impact of inductive termination on fast transient phenomena known as travelling waves. Specifically, DC-side inductors can form a significant reflection boundary for the generated travelling waves. A deeper insight into the faults has been achieved by utilising wavelet transform.

AB - This study presents a detailed DC-side fault analysis considering inductive termination of lines within a high-voltage multi-terminal direct current (MTDC) grid. The analysis aims to provide design guidelines for DC-side inductors, taking into account important aspects of protection such as the required speed of operation of relays and the performance characteristics of current interruption devices (i.e. of DC circuit breakers). Moreover, the impact of current limiting inductors on the fault signatures is investigated. In particular, it has been found that DC-side inductors not only limit the fault current level, but also the resulting signatures in voltage and current, can assist to enhance the speed of operation, stability and selectivity of protective functions for DC-side faults. The analysis has been extended to include the impact of inductive termination on fast transient phenomena known as travelling waves. Specifically, DC-side inductors can form a significant reflection boundary for the generated travelling waves. A deeper insight into the faults has been achieved by utilising wavelet transform.

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