The Effects of Filter Capacitors on Cable Ripple at Different Sections of the Wind Farm Based Multi-Terminal DC System

In most DC power systems, power electronic devices can introduce ripple content into the DC grid, where large input ripple currents on the DC link can have a negative influence. Under these circumstances, DC side filters play an important role in the reduction of ripple content. In this paper, based...

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Autores principales:	Xiaoyun Rong, Jonathan K. H. Shek, D. Ewen Macpherson, Phil Mawby
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	DC side capacitors DC-DC converter FFT analysis relative losses total harmonic distortion Technology T
Acceso en línea:	https://doaj.org/article/de8ea7f00c2d4e779800a85d49582264
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spelling	oai:doaj.org-article:de8ea7f00c2d4e779800a85d495822642021-11-11T15:49:02ZThe Effects of Filter Capacitors on Cable Ripple at Different Sections of the Wind Farm Based Multi-Terminal DC System10.3390/en142170001996-1073https://doaj.org/article/de8ea7f00c2d4e779800a85d495822642021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7000https://doaj.org/toc/1996-1073In most DC power systems, power electronic devices can introduce ripple content into the DC grid, where large input ripple currents on the DC link can have a negative influence. Under these circumstances, DC side filters play an important role in the reduction of ripple content. In this paper, based on a full detailed closed loop model of the entire offshore wind farm multi-terminal DC network, the effect of filter capacitors connected at different sections of the system on the limitation of the AC ripple content, particularly in the DC cables, is studied. In contrast to other work on HVDC for offshore wind, where simplified or equivalent circuits are mainly used while concentrating on the power and control system, this study can be regarded as the specific study of filter capacitors operating within a detailed system model. Utilising the advantages of PLECS, which is a highly effective tool in the simulation of power electronic circuits, no small-signal or simplified equivalent models are used in the system, and the entire study is based on detailed and accurate models of the semiconductor elements and transformers, which help to provide more realistic simulation results and a better understanding of the system. Another novel point in this paper is a new concept, relative losses, which is proposed to simplify extensively the calculation of losses in this research. Finally, the size of the filter capacitors at different sections of the system under different situations is suggested.Xiaoyun RongJonathan K. H. ShekD. Ewen MacphersonPhil MawbyMDPI AGarticleDC side capacitorsDC-DC converterFFT analysisrelative lossestotal harmonic distortionTechnologyTENEnergies, Vol 14, Iss 7000, p 7000 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	DC side capacitors DC-DC converter FFT analysis relative losses total harmonic distortion Technology T
spellingShingle	DC side capacitors DC-DC converter FFT analysis relative losses total harmonic distortion Technology T Xiaoyun Rong Jonathan K. H. Shek D. Ewen Macpherson Phil Mawby The Effects of Filter Capacitors on Cable Ripple at Different Sections of the Wind Farm Based Multi-Terminal DC System
description	In most DC power systems, power electronic devices can introduce ripple content into the DC grid, where large input ripple currents on the DC link can have a negative influence. Under these circumstances, DC side filters play an important role in the reduction of ripple content. In this paper, based on a full detailed closed loop model of the entire offshore wind farm multi-terminal DC network, the effect of filter capacitors connected at different sections of the system on the limitation of the AC ripple content, particularly in the DC cables, is studied. In contrast to other work on HVDC for offshore wind, where simplified or equivalent circuits are mainly used while concentrating on the power and control system, this study can be regarded as the specific study of filter capacitors operating within a detailed system model. Utilising the advantages of PLECS, which is a highly effective tool in the simulation of power electronic circuits, no small-signal or simplified equivalent models are used in the system, and the entire study is based on detailed and accurate models of the semiconductor elements and transformers, which help to provide more realistic simulation results and a better understanding of the system. Another novel point in this paper is a new concept, relative losses, which is proposed to simplify extensively the calculation of losses in this research. Finally, the size of the filter capacitors at different sections of the system under different situations is suggested.
format	article
author	Xiaoyun Rong Jonathan K. H. Shek D. Ewen Macpherson Phil Mawby
author_facet	Xiaoyun Rong Jonathan K. H. Shek D. Ewen Macpherson Phil Mawby
author_sort	Xiaoyun Rong
title	The Effects of Filter Capacitors on Cable Ripple at Different Sections of the Wind Farm Based Multi-Terminal DC System
title_short	The Effects of Filter Capacitors on Cable Ripple at Different Sections of the Wind Farm Based Multi-Terminal DC System
title_full	The Effects of Filter Capacitors on Cable Ripple at Different Sections of the Wind Farm Based Multi-Terminal DC System
title_fullStr	The Effects of Filter Capacitors on Cable Ripple at Different Sections of the Wind Farm Based Multi-Terminal DC System
title_full_unstemmed	The Effects of Filter Capacitors on Cable Ripple at Different Sections of the Wind Farm Based Multi-Terminal DC System
title_sort	effects of filter capacitors on cable ripple at different sections of the wind farm based multi-terminal dc system
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/de8ea7f00c2d4e779800a85d49582264
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The Effects of Filter Capacitors on Cable Ripple at Different Sections of the Wind Farm Based Multi-Terminal DC System

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