Comparison of Different Engagement and Dispatch Protocols applied to the Units Responsible of Charging and Discharging an Ocean Battery System: Simulation-based Study to Evaluate the Efficiency and Performance of the System

Master thesis (2021)

Authors

L. Pasqualini Electrical Engineering, Mathematics and Computer Science

Contributors

L.M. Ramirez Elizondo DC systems, Energy conversion & Storage - EEMCS (supervisor 1)
Marijn van Rooij (supervisor 1)
P. Bauer DC systems, Energy conversion & Storage - EEMCS (coach)
José L. Rueda Intelligent Electrical Power Grids - EEMCS (coach)
Faculty
Electrical Engineering, Mathematics and Computer Science
Copyright: © 2021 Luca Pasqualini
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Published Date

25-01-2021

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Abstract

The company Ocean Grazer BV is interested in launching to the market a novel storage technology: the Ocean Battery. Such battery will be installed under the sea with the purpose to store the surplus power produced by wind turbines in the form of potential energy by filling an elastic bladder, exposed to the ocean pressure, with water. This thesis has two purposes: the first is to create in Simulink a model that can simulate the dynamic behavior of the hydraulic and electric components used for the filling and draining process of the bladder. The second, is to study how the engagement and dispatch protocol of the Battery Management System, applied to different configurations of the electric components, changes the efficiency and the performance of the system. Ultimately, the optimal configuration and protocol are evaluated and decided.
By “Machine Engagement and Dispatch protocol” we define the procedure adopted to determine how many, which and how the units forming the different stacks should be activated and operated given a certain power demand value. The protocols created will indeed communicate the system how many and which machines should operate in full load conditions and how much power the ones operated in partial load should exchange at any instant of time. The study solves the problems of the company which now has a dynamic model able to simulate the behavior of the power exchanging parts of the Ocean Battery and knows what the strengths and the weaknesses of the different configurations and protocols are. An optimal solution for the considered case has been found. Nevertheless, this study does not include the possibility of having more storage units communicating among them which remains an unsolved problem for the company. This further work could possibly be implemented starting from this thesis and using the created Simulink program, which is a new useful tool the company now possesses to progress in its growth.