Offshore Wind Accelerator: Impact of harmonic temporary overvoltages (TOVs) on high voltage (HV) equipment for offshore wind farms (OWF)

Call for proposals from companies and consortia interested in undertaking a study to understand and mitigate offshore wind farm risk concerning SSO during the development and design stage of a project, as well as during the project execution to confirm grid code compliance.

The main objectives of this work are to establish the key points below.

  • a.    The development of new methods for mitigating the risk of TOVs in offshore wind farms. 
  • b.    The development of new screening methods to identify offshore wind farms at risk of TOVs.
  • c.    To assess the impact of TOVs with harmonic content on the dielectric and thermal withstand characteristics of HV equipment such as transformers, cables, reactors STATCOMs etc. 
  • d.    The development of new testing methods to assess the TOV withstand characteristics of HV equipment for OWF (new test waveforms that represent the range of TOVs with harmonic content that can occur in OWF) and to assess the withstand characteristics of LV equipment that must remain connected when TOV events occur (i.e. to assess the high-voltage-ride-though implications for all connected equipment such as converters).
  • e.    The development of new design guidelines for offshore wind farms to mitigate the risk of TOVs.

Clarification questions should be received by 31 May 2024, 12.00 BST and the answers to these questions will be posted below on 11 June 2024. 

The closing date to receive tender submissions is 28 June 2024, 12.00 BST.

All clarification questions and tender submissions should be sent electronically, by their respective deadlines, to Daniel Yates at daniel.yates@carbontrust.com and Ciara Ritson-Courtney at ciara.ritson-courtney@carbontrust.com.