Summary
As offshore wind projects grow in scale globally, ensuring the mechanical and electrical integrity of HV equipment on offshore substations becomes increasingly critical. Current seismic evaluation practices for HV equipment on offshore platforms have limitations for nonstructural components such as HV equipment.
Read more Read lessSeismic design criteria for offshore structures are specified in international standards, such as
ISO 19901-2 [1]. There is, however, very little guidance provided for the design of nonstructural components on offshore substations. ISO 19901-2 mentions that “Equipment on deck shall be designed to withstand motions that account for the transmission of ground motions through the structure” and establishes that Time history analysis is the relevant method for establishing loads on equipment. Although this is technically reasonable, it puts suppliers of high voltage systems in a Catch-22 situation, as the design details of the platform are often not available at the time of tendering, let alone any time history simulation results. The Platform designer is naturally in a better position to perform the global time history simulations than the
High voltage system supplier, but the requirements fall on the system supplier to handle the design accelerations that are the outcome of these simulations.
Hence, high voltage system suppliers must base their tenders on estimated seismic loads. This constitutes a significant risk, as late revisions of the seismic loads – such as an increase in design accelerations during project execution – may suddenly result in a situation where key equipment
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | B3_11350_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Sweden |
| Study committees | |
| File size | 700 KB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
BACKSTROM Daniel - Hitachi Energy; ÖRTENMARK Patrik - Hitachi Energy; HUANG Hui - Hitachi Energy; WIIK Kim - Aibel A S
