Electromagnetic dispersion modeling and measurements for HVDC power cables
Nordebo, Sven LU ; Nilsson, Börje ; Biro, Thomas ; Cinar, Gökhan ; Gustafsson, Mats LU
; Gustafsson, Stefan
; Karlsson, Anders
LU
and Sjöberg, Mats
(2011)
In Technical Report LUTEDX/(TEAT-7211)/1-32/(2011)
- Abstract
- This paper provides a general framework for electromagnetic modeling, computation and measurements regarding the wave propagation characteristics of High-Voltage Direct Current (HVDC) power cables. The modeling is focused on very long (10 km or more) HVDC power cables and the relevant frequency range is therefore in the low-frequency regime of about 0-100 kHz.
An exact dispersion relation is formulated together with a discussion on practical aspects regarding the computation of the propagation constant and the related characteristic impedance. Experimental time-domain measurement data from an 80 km long HVDC power cable is used to validate the model.
It is concluded that a single-mode transmission line model is not... (More) - This paper provides a general framework for electromagnetic modeling, computation and measurements regarding the wave propagation characteristics of High-Voltage Direct Current (HVDC) power cables. The modeling is focused on very long (10 km or more) HVDC power cables and the relevant frequency range is therefore in the low-frequency regime of about 0-100 kHz.
An exact dispersion relation is formulated together with a discussion on practical aspects regarding the computation of the propagation constant and the related characteristic impedance. Experimental time-domain measurement data from an 80 km long HVDC power cable is used to validate the model.
It is concluded that a single-mode transmission line model is not adequate to account for the mismatch between the power cable and the instrumentation.
A mismatch calibration procedure is therefore devised to account for the connection between the measurement equipment and the cable. A dispersion model is thus obtained that is accurate for early times of pulse arrival.
To highlight the potential of accurate electromagnetic modeling, an example of high-resolution length-estimation is discussed and analyzed using statistical methods based on the Cramer-Rao lower bound. The analysis reveals that the estimation accuracy based on the present model (and its related model error) is in the order of 100 m for an 80 km long power cable, and that the potential accuracy using a perfect model based on the given measurement data is in the order of centimeters. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2202385
- author
- Nordebo, Sven
LU
; Nilsson, Börje
; Biro, Thomas
; Cinar, Gökhan
; Gustafsson, Mats
LU
; Gustafsson, Stefan
; Karlsson, Anders
LU
and Sjöberg, Mats
- organization
- publishing date
- 2011
- type
- Book/Report
- publication status
- published
- subject
- in
- Technical Report LUTEDX/(TEAT-7211)/1-32/(2011)
- pages
- 32 pages
- publisher
- [Publisher information missing]
- report number
- TEAT-7211
- language
- English
- LU publication?
- yes
- id
- fa5767a5-5817-48c5-8ebd-13e29e6829ad (old id 2202385)
- date added to LUP
- 2016-04-04 13:48:43
- date last changed
- 2018-11-21 21:16:27
@techreport{fa5767a5-5817-48c5-8ebd-13e29e6829ad,
abstract = {{This paper provides a general framework for electromagnetic modeling, computation and measurements regarding the wave propagation characteristics of High-Voltage Direct Current (HVDC) power cables. The modeling is focused on very long (10 km or more) HVDC power cables and the relevant frequency range is therefore in the low-frequency regime of about 0-100 kHz. <br/><br>
An exact dispersion relation is formulated together with a discussion on practical aspects regarding the computation of the propagation constant and the related characteristic impedance. Experimental time-domain measurement data from an 80 km long HVDC power cable is used to validate the model.<br/><br>
It is concluded that a single-mode transmission line model is not adequate to account for the mismatch between the power cable and the instrumentation.<br/><br>
A mismatch calibration procedure is therefore devised to account for the connection between the measurement equipment and the cable. A dispersion model is thus obtained that is accurate for early times of pulse arrival.<br/><br>
To highlight the potential of accurate electromagnetic modeling, an example of high-resolution length-estimation is discussed and analyzed using statistical methods based on the Cramer-Rao lower bound. The analysis reveals that the estimation accuracy based on the present model (and its related model error) is in the order of 100 m for an 80 km long power cable, and that the potential accuracy using a perfect model based on the given measurement data is in the order of centimeters.}},
author = {{Nordebo, Sven and Nilsson, Börje and Biro, Thomas and Cinar, Gökhan and Gustafsson, Mats and Gustafsson, Stefan and Karlsson, Anders and Sjöberg, Mats}},
institution = {{[Publisher information missing]}},
language = {{eng}},
number = {{TEAT-7211}},
series = {{Technical Report LUTEDX/(TEAT-7211)/1-32/(2011)}},
title = {{Electromagnetic dispersion modeling and measurements for HVDC power cables}},
url = {{https://lup.lub.lu.se/search/files/6210760/2202388.pdf}},
year = {{2011}},
}