Formosa 1 Offshore Windfarm, Taiwan


Formosa 1 is an offshore windfarm being developed near Miaoli, in the west coast of Taiwan. The 130MW windfarm will be Taiwan's first commercial-scale offshore wind project.

The farm is planned to be developed in two phases - a demonstration phase with two wind turbines, and a commercial phase.

Two 4MW wind turbines were installed under the demonstration phase in November 2016, and commenced operations in April 2017. The second phase involves the addition of another 30 turbines with a combined capacity of 120MW. Construction on phase two is expected to start in 2018 and should be completed by early 2020.

Swancor Renewable, a subsidiary of chemical and composite material manufacturer Swancor Holding, is developing the project.

Formosa is one of the three projects approved by Taiwan Ministry of Economic Affairs Bureau of Energy as part of its target to build 1,000 wind turbines by 2030 to support the Taiwanese government's plans to produce 4GW of electricity through offshore wind. It also announced 36 sectors for offshore windfarm development in 2015.

Formosa 1 project ownership

Macquarie Capital and DONG Energy entered an agreement with Swancor Renewable to purchase 50% and 35% interest respectively in the project.

Following the transaction, Swancor Renewable will hold the remaining 15% stake and undertake the site development and construction, while DONG Energy will render advisory services.

Formosa 1 offshore windfarm details

Approximately 6km off the west coast of Miaoli in the Strait of Taiwan, spread over an area of 11km², Formosa 1 windfarm lies in water depths of 15m-30m.

The demonstration phase is equipped with two Siemens SWT-4.0-120 wind turbines, each with a rated capacity of 4MW. The turbines have a rotor diameter of 120m, 58.5m-long rotor blades and a swept area of 11,300m².

"Formosa is one of the three projects approved by Taiwan Ministry of Economic Affairs Bureau of Energy as part of its target to build 1,000 wind turbines by 2030."

The wind turbines are installed on monopile foundations using A2SEA's Torben vessel. Siemens monitors the turbines from its remote diagnostic centre in Brande, Denmark, on a 24/7 basis.

The energy generated by the windfarm will be directly transmitted to the proposed onshore transformer station.

Financing for the Taiwanese windfarm

The Changhua County Government signed a memorandum of understanding on 8 March with Macquarie Formosa 1 and Swancor Renewable Energy to invest NT$210bn ($6.8bn) in the project.

Contractors involved with Formosa 1

Swancor Renewable engaged Sinotech Engineering Consultants for the construction of the offshore windfarm. Sinotech sub-contracted COWI for the turbine foundation design.

K2 Management is acting as the general consultant and has conducted wind modelling and wind data analysis for the project.

Siemens was awarded a contract for supplying two 4MW turbines for the first phase of the Formosa windfarm. The company will also provide ten-year service and maintenance for the turbines.

IX was engaged to provide technical and commercial advisory services on the wind turbines selection and tender. Wind Minds has been appointed as the technical advisor for the project and will provide advisory services on commercial issues, logistics and balance-of-plant works.

German company Palfinger Marine supplied two PF 8000 fixed-boom type platform cranes for the project.

Tekmar Energy supplied its TEKLINK® cable protection system (CPS) to shield the underwater power cables during installation.

Woen Jinn Harbour was engaged to perform installation of the power cables and Tekmar Energy's CPS.