Offshore electricity transmission, GB SQSS review

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Offshore electricity transmission, GB SQSS review

• Monday 3rd July Andy Hiorns

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Introduction

• Sub-group objectives
• Assess the relevance of the existing onshore GB
  SQSS for application to offshore transmission
  networks
• Provide recommendations to OTEG identifying
  feasible options for security standards relating
  to offshore transmission networks.
• Note Amendments to onshore standards are out of
  scope of this group
• Timescales
• Submit recommendations to OTEG late August

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Proposals

• Focus on most relevant areas of GB SQSS
• Generation connection criteria
• Customer choice variations
• Voltage Compliance
• Establish appropriate deterministic level for
  generation connection criteria by cost benefit
  analysis
• Formulate network models
• Populate with real system data
• Carry out cost benefit analysis on these models

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Methodology for analysis
Issues to consider Cable is assumed unavailable
2 of time Generation is at full
output 30 of the time Losses Revenue /
Electrical Benefit gained by installation of
additional circuit capacity
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Work in progress

• Proposed network models for analysis presented in
  paper GB SQSS 1. Paper agreed at 2nd subgroup
  meeting 27th June 2006.
• Defining exact data requirements before carrying
  out cost benefit analysis.
• Population of network models in progress.
• Compiling data and maintaining documents with all
  information received.
• Regular progress meetings planned to ensure
  agreement of work in progress.
• All assumptions made during the analysis to be
  noted and accompany sub group recommendations.
• Meeting notes and discussion papers published on
  DTI and Ofgem websites as produced.

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Issues noted to date

• Requirement to assess impact that offshore
  security can have on onshore transmission network
  capability to meet ACS demand.
• Updates to technical codes will follow the GB
  SQSS review work.
• Commercial frameworks will follow once optimum
  design solution has been established
• Use of system charges
• Access rights
• Interface concerns with DNO connections between
  onshore and offshore TO.