Located approximately 155 km west of Stavanger, the Johan Sverdrup (JS) O&G field is among the largest ever discovered on the Norwegian continental shelf. The power feeding the JS field, together with its satellite platforms, is supplied by two symmetric monopole HVDC links from two vendors in parallel connection both on shore and offshore. These two links were developed in two consecutive phases, in which Phase-1 is a two-level VSC-HVDC of 100 MW from Hitachi Energy (in operation since 2019), and Phase-2 is a 200 MW MMC-HVDC from Siemens commissioned in July 2022. The JS project is Europe’s first multi-vendor parallel connected HVDC systems in grid-forming operation.
HIL simulation using the C&P replicas from both vendors and the RTDS simulator was opted as an indispensable approach to de-risking the parallel operation of the JS HVDC systems due to:
- Accurate representation of the C&P functions implemented by both vendors is compulsory to investigate potential interaction phenomena and improve multi-vendor interoperability.
- Intellectual properties of each vendor must be protected, making the use of a detailed open offline model impossible in system testing and problem-solving.
- A global controller, namely the Power Management System (PMS), whose functions are not available in the offline model, was used to coordinate power sharing between both HVDC links.
- This approach has been proven extremely helpful to prepare for and perform on-site commissioning tests while ensuring
stable and continuous production.
The aforementioned aspects shall be further developed during the presentation.
Ming Cai | RTE International