CDWE Hai Long 2 substation jacket

Hai Long 2 Offshore Substation Jacket Stands

The jacket foundation for the Hai Long 2 offshore substation has been installed by CSBC-DEME Wind Engineering’s (CDWE) Green Jade vessel in Taiwan.

CDWE Hai Long 2 substation jacket
Credit: CDWE

Hai Long comprises two offshore wind farms, the 532 MW Hai Long 2 and the 512 MW Hai Long 3 and is being developed in three phases as Hai Long 2 is further split into two smaller offshore wind farms, the 300 MW Hai Long 2a and the 232 MW Hai Long 2b.

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

CDWE signed a contract for the transportation and installation of the foundations, turbines, and offshore substations for the three offshore wind farms making up the Hai Long project in 2022.

The jacket foundation that was installed for the Hai Long 2 offshore substation weighed a total of 3,414 tonnes, breaking the record for the heaviest single lift jacket ever placed in Taiwan waters and the heaviest lifting operation executed since the official launch of the Green Jade, said Northland Power.

The first of two substations built for the Hai Long 2 and Hai Long 3 offshore wind projects left Vung Tau, Vietnam, at the end of last month and is en route to the Taiwan Strait.

A consortium comprising Semco Maritime and PTSC Mechanical & Construction (PTSC M&C) is responsible for the detailed design, procurement, construction, and commissioning of the two substations including jackets.

The substations will be equipped with two Palfinger’s stiff boom cranes with an outreach of 26 metres, four life raft davits, and four fixed boom cranes, with the latter to be used to lift materials and tools from a crew transfer vessel (CTV) onto the offshore substation.


The 1,044 MW Hai Long offshore wind project will have 73 Siemens Gamesa SG 14-222 DD wind turbines, installed on three-legged jacket foundations approximately 45-70 kilometres off the Changhua coast in the Taiwan Strait, 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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