Frequency Response Evaluation of an Isolated System Integrating Offshore Wind Generation and an Oil and Gas Platform

The possibility of integrating offshore wind farms to supply energy to maritime oil and gas (O&G) extraction installations represents a promising greener solution for the sector, since the production of clean and renewable energy may be able to meet, in whole or in part, the high energy demand of the system, in addition to being an interesting alternative to reduce fuel gas costs and even investment in transmission links to the coast. On the other hand, although there are several advantages inherent to the high penetration of renewable energy sources, inverter-based generation does not provide any inertial response to the system and therefore compromises frequency stability. Thus, it is necessary to assess the stability of the electrical network, taking into account that it is an isolated operation and, consequently, weaker than a conventional onshore network. In this sense, the effectiveness of control strategies for frequency support is investigated, contributing to the stable operation of the system. For this, a test system is implemented and evaluates how the addressed control strategies should act on the frequency response of the model through dynamic simulations considering a disturbance. The results have shown an adequate performance contributing to the primary frequency response when compared to the unsupported system.