title: Integrated energy operation solution customized for floating offshore wind power characteristics
Creators: name: Chen, Lingte
Publisher: name: University of Glasgow
Year: 2024

description: Amidst global efforts towards carbon neutrality and energy transition, offshore wind power has emerged as a critical source of clean energy, attracting significant attention from governments and investors worldwide. This thesis provides an in-depth exploration of Floating Offshore Wind Turbines (FOWTs), focusing on their dynamic performance and power quality under varying wind and wave conditions. The overarching goal is to optimize the design, operation, and integration of FOWTs into renewable energy systems, thereby enhancing their contribution to sustainable energy generation.

By integrating mechanical and electrical models, this research deepens our understanding of FOWT dynamics, facilitating more accurate power system analysis. The study introduces fully coupled mathematical models that address existing research gaps, particularly in the context of Wind Power Ramp Events (WPREs). The investigation highlights the distinctive dynamic responses of FOWTs, which are markedly different from those of conventional bottom-fixed turbines, due to their floating nature. These findings underscore the importance of considering wave-induced loading and pitch motion in FOWT design and operation, as these factors significantly influence power output and operational stability.

In addition, the research tackles the challenges associated with the low-frequency power fluctuations and reduced power generation efficiency in FOWTs. A novel bus extension scheme is proposed, incorporating a sea wave band stop filter and a Hybrid Energy Storage System (HESS) under Real-Time Coordinated Control (RTCC). This approach maximizes the potential of energy storage systems, improves power quality, and ensures better compliance with grid dispatch commands. The study's innovative control strategies, particularly the dynamic adjustment of Kalman filter parameters, offer significant advancements in mitigating WPREs and optimizing FOWT performance.

Furthermore, the thesis explores the integration of wind and solar power on a novel catamaran FOWT platform. Through dynamic simulations and control strategies, the study demonstrates the platform's robust dynamic stability and its ability to maintain consistent power generation under adverse sea conditions. The research also delves into the effectiveness of various wind-solar capacity ratios and PV system configurations, highlighting their potential to enhance power quality and energy complementarity. These insights pave the way for the development of integrated renewable energy systems, particularly in coastal environments.

In conclusion, this thesis makes significant contributions to the understanding of FOWT dynamics, the optimization of power quality, and the integration of wind and solar energy on floating platforms. The findings provide valuable guidance for policymakers, researchers, and industry stakeholders, driving the advancement of offshore renewable energy technologies. As the world continues its transition towards sustainable energy, the insights and innovations presented in this research will play a crucial role in shaping the future of offshore wind power and its integration with other renewable energy sources.