Traditionally, offshore oil and gas installations have been electrified by means of power generation equipment installed on the platform themselves. In recent year however, more and more offshore assets have been electrified by transmitting them power generated onshore through high voltage submarine power cable.

The alternative solution studied in this paper is the use of an offshore electrical power distribution hub connected to onshore power generation with a high voltage submarine power cable and supplying power to other offshore assets.

The focus of this study is put on the high voltage submarine power cable system transferring a power of 300 MW from an onshore power plant to the offshore power distribution hub located in the Arabian Gulf region.

Cases considering different transmission length, ranging from 50 km to 100 km and different voltage levels, i.e. 220 kV, 275 kV and 380 kV, are defined, analysed and compared technically. An overview of the technology current state of the art is also presented.

In addition, an economical assessment including manufacturing, installation as well as cost of losses over a period of 30 years is performed for the various cases.

With the high focus on cost and increasing concern for environmental impact in the industry, alternative solutions for the electrification of offshore assets are necessary. This study aims to demonstrate that a offshore power distribution hub supplying offshore assets with power generated onshore is a technical and economic viable alternative.

You can access this article if you purchase or spend a download.