Transient analysis of circuit breakers in an offshore wind power system based on the Cassie-Mayr model
Author
Jørgensen, Maria Alexandra Balslev
Term
4. semester
Education
Publication year
2020
Submitted on
2020-05-29
Pages
58
Abstract
Dette projekt udvikler matematiske modeller, der beskriver, hvordan den elektriske lysbue i en afbryder opfører sig. En lysbue er den glødende, ledende kanal, der kan opstå, når en afbryder bryder strømmen. Modellerne bygger på de klassiske Cassie–Mayr-modeller og en videreudviklet variant, Schwarz–Avdonin. Først blev modellerne udledt og derefter implementeret i Simulink for at undersøge deres dynamik. Efterfølgende blev de implementeret i PowerFactory med ønsket om at kunne lave en transientanalyse (en korttidsdynamisk analyse af hurtige forløb) af et havvindkraftanlæg. Resultatet viser, at det er muligt at udvikle modeller, der beskriver lysbuens opførsel, men der kræves yderligere arbejde, før en transientanalyse i PowerFactory kan gennemføres.
This project develops mathematical models to describe how the electric arc in a circuit breaker behaves. An electric arc is the glowing, conductive path that can appear when a breaker interrupts current. The models are based on the classical Cassie–Mayr approach and a modified version, Schwarz–Avdonin. The models were derived and then implemented in Simulink to study their dynamics. They were subsequently implemented in PowerFactory with the aim of performing a transient analysis (a short-term study of fast events) of an offshore wind power plant. The results show that it is possible to develop models that describe arc behavior, but additional work is needed before a transient analysis in PowerFactory can be carried out.
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