Design, Economic Operation and Performance Optimization of Grid-Connected Offshore Wind Farms, PV system and Subsea Pumped Hydro Storage for Critical Loads. Case Study in Denmark

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2022-9-1

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Odion, Noah

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Power solution obtainable from Hybrid renewable energy system is promising and clean. However, since it is weather-dependent, it cannot follow variations in demand. This inherent variability, especially in wind and solar energy, causes mismatch between energy production and demand mostly at the time of demand thereby causing grid instability and increasing the risk of blackout. The subsea pumped hydro can solve this problem by storing excess energy from wind and solar and then dispatch it when demanded. Unlike conventional Pumped hydro, it uses the sea as an upper reservoir, a hollow sphere on the sea bed as the lower reservoir and the pressure difference in the sea as the head. During pumping and charging operations, water is pumped out of the sphere. Similarly, during generating and discharging operations, water falls back into sphere and drives an integrated turbine. It can be utilized for ancillary services in the electricity market to generate revenue. Existing literatures have investigated the techno-economic feasibility of this technology in various dimensions. However, this study focus on balancing the numerous offshore wind energy and solar energy in Danish energy mix. Also, it considers the economic viability of operating the subsea pumped hydro for ancillary services in the Nord Pool using scenario-based studies in understudied location

Subject Keywords

Pumped hydro power, Subsea energy storage, Grid balance, Ancillary services

URI

https://hdl.handle.net/11511/99760

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Northern Cyprus Campus, Thesis

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Citation Formats

N. Odion, “Design, Economic Operation and Performance Optimization of Grid-Connected Offshore Wind Farms, PV system and Subsea Pumped Hydro Storage for Critical Loads. Case Study in Denmark,” M.S. - Master of Science, Middle East Technical University, 2022.