Abstract
The paper addresses approaches to increasing the efficiency of wind turbines operating in autonomous mode in Arctic regions. Such type of wind turbine operation is related to fluctuations of the generated power, that negatively affects grid power quality. The increase of wind turbines efficiency is achieved by the utilization of current reserve of power converter, which is a necessary part of megawatts-sized wind energy generation unit. The developed Simulink model of the wind turbines, built according to two of the most suitable for megawatts-level power generation topologies, was used to determine their power output depending on the wind turbine’s rotor speed and the wind speed. Obtained power profile was then used to determine the amount of free current reserve depending on the wind speed, which has verified the ability of both wind turbine topologies to efficiently improve grid power quality, therefore leading to reduction or absence of the necessity to install additional power equipment for the compensation purpose.
Highlights
Arctic deposits of fossil fuels play a vital role in ensuring the needs of the modern world in fuel [1]
The computer model of 2 MW wind turbines (WT) suited for nominal wind speed up to 12 m/s was developed in MATLAB/Simulink environment to determine the active power load of the WT depending on both wind and rotor speeds
AB segment of the curve corresponds to WT working under low wind speeds, extracted power from the air flow is not maximum, as rotor speed remains below optimal level at its lowest value specified by the maximum slip value of generator
Summary
Arctic deposits of fossil fuels play a vital role in ensuring the needs of the modern world in fuel [1]. Since Arctic is a remote territory, energy supply of settlements, drilling and mining sites is provided by autonomous power sources, mainly by diesel generators [2]. Thereby, exploration and development of the Arctic deposits is hardly limited by the cost of consumed diesel fuel and the cost of its transportation to the destination sites, which might be several times higher than the cost of the fuel itself. It has been shown that use of renewable energy sources to supply the settlements and development sites is a cost-effective solution to the problem of energy generation for remote infrastructure facilities [3]. Active interest in Arctic exploration leads to the expected addition of megawatts consumed by larger settlements and drilling plants [4]
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