Semco Maritime Hai Long

First Hai Long Offshore Substation Sets Sail for Taiwan Strait

The first of two offshore substations built for the Hai Long 2 and Hai Long 3 offshore wind projects has set sail from Vung Tau, Vietnam, and is en route to the Taiwan Strait.

Source: Semco Maritime via LinkedIn

A consortium comprising Semco Maritime and PTSC Mechanical & Construction (PTSC M&C) is responsible for delivering the two offshore substations for the 1,022 MW Hai Long offshore wind project.

The first steel for the approximately 2,000-tonne structure was cut in November 2022.

The Hai Long project comprises two offshore wind farms, the 518 MW Hai Long 2 and the 504 MW Hai Long 3, and is being developed in three phases. Hai Long 2 is further split into two smaller offshore wind farms, the 294 MW Hai Long 2a, and the 224 MW Hai Long 2b.

The offshore construction commenced at the wind farm site in Taiwan this month with the vessel Green Jade installing pin piles for the project’s jacket foundations.

The first campaigns will involve the installation of foundation pin piles, followed by the laying of subsea cables and the installation of offshore substations. Wind turbine installation activities are expected to start next year.


The wind farm will feature 73 Siemens Gamesa SG 14-222 DD wind turbines, installed on three-legged jacket foundations approximately 45-70 kilometres off the Changhua coast, in water depth between 41-56 metres.

Expected to be commissioned in 2025/2026, Hai Long is owned and developed by Hai Long Offshore Wind, a consortium comprising Northland Power, Yushan Energy, Mitsui & Co., Ltd., and Gentari.


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