Dynamic Thermoelectric Modelling of Oil-filled Transformers for Optimized Integration of Wind Power in Distribution Networks

Thumbnail Image

Files

CIRED 2019 - 1744.pdf (660.77 KB)

Paper number

1744

Working Group Number

Conference name

CIRED 2019

Conference date

3-6 June 2019

Conference location

Madrid, Spain

Peer-reviewed

Yes

Short title

Convener

Authors

Kazmi, Syed Hamza Hasan, Orsted Offshore Wind A/S, Denmark
Holbøll, Joachim, Technical University of Denmark (DTU), Denmark
Olesen, Thomas Herskind, Orsted Offshore Wind A/S, Denmark
Sørensen, Troels Stybe, Orsted Offshore Wind A/S, Denmark

Abstract

Oil-filled power transformers are some of the most critical components in the distribution network. The grid upgrade cost along with congestion challenges associated with rapid increase in onshore wind energy integration in the distribution system can partly be resolved by dynamic loading of transformers. Distribution transformers can be dynamically rated if the temperatures, especially Top-Oil (TOT) and Hot-Spot (HST) temperatures, are accurately determined. This paper presents industry’s well-proven and established differential equations-based thermoelectric models for transformers. The models are validated, and the performances are compared with the measured temperatures for a 6.8 MVA wind turbine transformer. Moreover, the thermal lifetime utilization of the test transformer is calculated based on its loading and ambient conditions history for the year 2017, using the recommendations of international loading guides. The annual thermal variations and lifetime utilization of test distribution transformer are assessed for an increase in wind energy production in 2017. Based on this analysis, further wind energy integration is facilitated by deferring grid expansion costs related to transformers

Table of content

Keywords

Publisher

AIM

Date

2019-06-03

Published in

CIRED 2019 Conference

Permanent link to this record

https://cired-repository.org/handle/20.500.12455/549
http://dx.doi.org/10.34890/771

ISSN

2032-9644

ISBN

978-2-9602415-0-1