Offshore Wind in Conjunction with an Offshore Oil and Gas Platform - Wind Power with Energy Storage in Synergy with Traditional Gas Turbine Generation.

Abstract

This thesis is part of the topic of wind power in combination with an oil and gas platform, and focuses on the interaction of an offshore wind farm, an energy storage system, and traditional offshore platform power generation supplying local loads. A simplified microgrid consisting of a wind farm with transmission system and a platform with gas turbine generator, energy storage and local loads has been constructed to illustrate this system, with an emphasis on energy storage system control modes. The model has been created in the simulation software MATLAB Simulink with use of its Simscape Power Systems module, and several test cases have been created and conducted simulations on.

The results presented depict the system performance during variations in load demand and wind power generation. The main focus has been on the behaviour of the sources of generation and the energy storage system with its charge and frequency stabilization modes in response to different conditions.

The result of the simulations show that the gas turbine generator and the wind farm are capable of supplying the local loads in tandem by fast response of the gas turbine. When wind power exceeds load consumption, the controllers in the energy storage system are capable of dynamically adjusting power flow to the battery in charge mode. When load demand exceeds wind power, the energy storage system helps stabilize the frequency by changing modes and allowing discharge of the battery. Considering these results in the context of decreasing carbon emissions providing offshore oil and gas platforms with wind power, an energy storage system - where applicable - seems to play a significant part within the subject of wind power to offshore oil and gas platforms.