Det Norske Veritas - Germanischer Lloyd

DNVGL  Offshore substations
 N DNVGL-ST-0145

Annotation

Introduction

This document is the DNV GL standard for the design of offshore substations. The standard is applicable for typical AC substation associated with offshore renewable energy projects, collectively denoted as “offshore substations”.

The performance-based approach promoted in this standard, complemented by prescriptive requirements and guidance, makes this document also relevant for novel designs and platforms beyond the proven concepts of AC substations – as it also covers important aspects of HV/DC converter platforms.

Topics covered by this standard are electrical design, safety aspects including system layout, fire and explosion protection and the response of the substation in emergency situations. Furthermore arrangement and layout concept of the platform as well as transfer and access to and from the substation is being addressed. Structural design, geo-technics, material and fabrication is covered to the necessary and specific extent unique for offshore substations but not in all detail. Whenever necessary or relevant, references are made to the applicable DNV GL standards or other normative references.

Besides design aspects the standard is written to contain information on manufacturing and in-service operation which are important to be considered already during the design phase.

The standard does not cover the design of wind turbine components, structures and safety philosophy. Cables are only covered to the extent necessary for the design of the offshore substation.

Guidance note: The present DNV GL standard will cover the technical requirements to be applied for the DNV GL certification schemes and it is also intended to cover the requirements implied when using IEC 61400-22 related certification schemes.