Report

Analysis of Vacuum Breaker Generated Transients in a 36kV Wind Farm Cable Grid

Updated 2021-10-11 Published 2019-02-19

In this project it is investigated how the high frequency transients (HF) in a cable grid influence connected equipment. Both generation and propagation as well as protection is studied.

Measurements in Stor-Rotliden’s wind farm where transformer failures occurred
are planned in the project. In comparison with the previous work in this field, the
focus here is on the design of grounding systems (GS), especially their HF
characteristics.

Component models derived in a previous Vindforsk project are improved and the
results are generalized so that they can be applied to components of different sizes.
Analysis of different GS is performed and the importance of different factors that
influence generation and propagation of transient overvoltages is determined.
Later it is analyzed how the transients influence connected components, and what
protection is needed.

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About the report

Report number

2018:502

Author

Tarik Abdulahovic