Comparison of different thermal models for optimized dimensioning of HV cable cluster grids as means of efficient integration of large scale renewable DER

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CIRED 2019 - 1696.pdf (517.43 KB)
Paper number
1696
Working Group Number
Conference name
CIRED 2019
Conference date
3-6 June 2019
Conference location
Madrid, Spain
Peer-reviewed
Yes
Short title
Convener
Authors
Wingender, Sebastian, E.DIS Netz GmbH, Germany
Trinks, Steffen, Technische Universität Berlin, Germany
Wessolek, Gerd, Technische Universität Berlin, Germany
Dorendorf, Stefan, E.DIS Netz GmbH, Germany
Abstract
As part of the ongoing grid extension planning to be performed in the distribution grid of E.DIS Netz GmbH, three (n-0) feed-in cable cluster grids shall be built galvanically separated from existing overhead lines on 110‑kV-level. Per definition these grid topologies shall exclusively serve for grid integration of large scale renewable distributed energy resources (DER). With these rather unique conditions in mind, several studies by E.DIS Netz GmbH and Technical University Berlin were performed, focusing on transient behaviour of cable and soil through thermal modelling, with the aim of enhanced current rating and CAPEX-optimized cable configuration. The main purpose of this paper is to give a summary of the conducted studies through a comparison of the applied time-sensitive thermal model approaches and their results for cable dimensioning. It was found that simplified and adjusted methods based on IEC standards lead to applicable results with remarkable potential for improved current ratings when referred to classical methods concerning steady-state conditions, while more sophisticated models including hydrology and heat transfer in soil will enhance simulation accuracy and furthermore enable optimized configuration for the herein specified conditions of separate feed-in cable cluster grids.
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Publisher
AIM
Date
2019-06-03
Published in
CIRED 2019 Conference
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/527
http://dx.doi.org/10.34890/751
ISSN
2032-9644
ISBN
978-2-9602415-0-1