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Energies 2012, 5(7), 2214-2231; doi:10.3390/en5072214

Transient Studies in Large Offshore Wind Farms Employing Detailed Circuit Breaker Representation

1
DONG Energy A/S, Kraftværksvej 53, Skærbæk, Fredericia 7000, Denmark
2
Institute of Energy Technology, Aalborg University, Pontoppidanstræde 101, Aalborg SE 9220, Denmark
*
Author to whom correspondence should be addressed.
Received: 25 May 2012 / Revised: 18 June 2012 / Accepted: 29 June 2012 / Published: 5 July 2012
(This article belongs to the Special Issue Electrical Power and Energy Systems)
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Abstract

Switching overvoltages (SOV) are considered a possible source of component failures experienced in existing offshore wind farms (OWFs). The inclusion of sufficiently accurate and validated models of the main electrical components in the OWF in the simulation tool is therefore an important issue in order to ensure reliable switching operations. Transient measurement results in an OWF are compared with simulation results in PSCAD EMTDC and DigSILENT Power Factory. A user-defined model of the vacuum circuit breaker (VCB) is included in both tools, capable of simulating multiple prestrikes during the closing operation. An analysis of the switching transients that might occur in OWFs will be made on the basis of the validated model, and the importance of the inclusion of a sufficiently accurate representation of the VCB in the simulation tool will be described. The inclusion of the VCB model in PSCAD greatly improves the simulation results, whereas little improvement is found in DigSILENT. Based on the transient study it is found that the simulated SOV can be up to 60% higher at the sending end when using the detailed VCB representation compared to the built-in switch, which emphasises the need for accurate representation of the VCB for energisation studies.
Keywords: cable modelling; circuit breaker modelling; DigSILENT Power Factory; model validation; offshore wind; transient studies; PSCAD cable modelling; circuit breaker modelling; DigSILENT Power Factory; model validation; offshore wind; transient studies; PSCAD
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Glasdam, J.; Bak, C.L.; Hjerrild, J. Transient Studies in Large Offshore Wind Farms Employing Detailed Circuit Breaker Representation. Energies 2012, 5, 2214-2231.

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