Hai Long

Introduction

The Hai Long offshore wind farm consists of Hai Long A and Hai Long B, collectively achieving a production capacity of 1044 MW. AFRY (formerly BLIX) sought high voltage electrical engineering expertise to support the project. This collaboration led to the execution of various tasks, including the electrical pre-FEED studies, writing the RFQ and assigning the electrical FEED studies, and providing expert support throughout the submarine cable packages.

Project background

The project consisted of 73x 14 MW wind turbines which were connected to two offshore substations via 66 kV inter array cables. These offshore substations connected via four 220 kV export cables into the onshore substations, which were constructed by local parties, prior to connecting into the Taiwanese high voltage transmission grid.

Guided from Taiwan's capital, Taipei, the project received support from engineers with European offshore wind farm development expertise facilitating seamless execution. Emphasis was placed on integrating local content into the project, aligning with Taiwan's economic development goals.

Role of Enersynt

Enersynt provided key technical expertise across various aspects of the project:

• Conducting electrical pre-FEED analyses to determine voltage levels, cable requirements, and equipment ratings.
• Leading the RFQ process for executing the electrical FEED studies and aiding in contractor selection.
• Offering extensive support to the cable package team, including drafting employer requirements, conducting loss calculations, and overseeing technical reports and testing requirements.
• Facilitating the inclusion of Distributed Temperature Sensing (DTS) and Distributed Acoustic Sensing (DAS) systems in the cable scope of the project and assisting in the related contractor selection. Furthermore, a system to monitor for thermal hotspots on the cable terminations was implemented, ensuring enhanced operational safety and longevity.

Conclusion

The Hai Long project highlights the immense value of bringing experienced team members together with local experts. The additional support by remote expertise, particularly during pre-engineering and engineering phases proved invaluable.

Furthermore, the innovative temperature measurement system applied for cable accessories sets a precedent for addressing industry challenges, offering valuable insights for future projects.