Orsted will begin construction this month of two onshore substations for the 900MW Changhua 1&2a wind farm off Taiwan.
A spokesman for the Danish developer said Taiwan Cogeneration subsidiary Star Energy will undertake the work, which will start with enabling before full construction gets underway in the summer.
The job includes engineering, procurement and construction. In addition to substations, the deal includes cable corridors, landfalls and transition joint bays.
The contract was awarded last November.
Taiwan Cogeneration chairman Chang Ming-Chieh said more than 85% of the project would be supplied by local suppliers, including electrical components such as transformers, resisters and cables.
Orsted announced its final investment decision on the Changhua project last week, following approval of its localisation plan by the Ministry of Economic Affairs and the signing of a power purchase agreements with Taipower.
The wind farm is expected online in 2021.