Best practice guidelines for offshore array monitoring and control with consideration of offshore wind and oil & gas experiences

Document

Version
Draft
Date
14/07/2014

This document “: Best practice guidelines for offshore array monitoring and control with consideration of offshore wind and oil & gas experiences” presents the results from the work in the DTOcean WP6 “System Control & Operation” within the task T6.1. The purpose of this task is to assess existing array level operation, maintenance and control methods and tools. Potential sources of knowledge for this will be the onshore and offshore wind industry and the offshore oil and gas industry. Offshore wind farms face very similar challenges with respect to foundations, submersed electrical systems, personnel and vessel access to array devices, transport of materials, etc. The offshore oil and gas industry has worked with floating or bottom fixed concrete and steel structures for several decades. Main experiences to be analysed here are expected to be related to corrosion problems and long term stability of mooring systems. Even though not explicitly mentioned in the deliverable title, control and operational strategy aspects will also be assessed.

This deliverable report analyses in the 2nd section the developments made in the above mentioned sectors with respect to operation and maintenance planning tools. Section 3 assesses existing approaches for maintenance strategies with their relevance to the work in DTOcean WP6. The 4th section discusses the application of advanced control strategies at an array level under different optimisation targets: decrease of power production costs, assure the grid integration with respect to different grid codes, decrease of load and the active power (frequency) / reactive power (voltage) control. The final section of the deliverable, Section 5 summarises the results of the assessments made.