DESIGN A SHUNT ACTIVE POWER FILTER FED BY 27-LEVEL INVERTER AND WIND TURBINE
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Date
2023-10-03
Authors
Manar Wael Shtaya
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Abstract
The need for energy is increasing rapidly along with the world's population. The generation of power assumes a critical role in facilitating national development by addressing the demands of the populace. Renewable energy sources, including solar energy, wind power, and others, have been utilised for centuries, predating the present era. Solar and wind energy are commonly acknowledged as the most promising modalities of renewable energy, and their utilisation is becoming increasingly prevalent.
The widespread use of non-linear loads in modern electrical systems leads to harmonic pollution of the main network. Apart from the issues instigated by harmonic currents, reactive power represents an additional challenge in power systems.
Enhancing the power of delivery quality to the system and achieve a power factor of unity, it is imperative to employ electrical filters to eliminate harmonics and reactive power. To improve the quality of the electricity, a parallel active filter is utilized.
In this research, a 27-level multi-level inverter besides an active power filter have been integrated with a wind turbine as a renewable energy source by using MATLAB/SIMULINK. The system has been designed to work under different operation scenarios, the system effects, if it is connected with separated load or with network, have been evaluated for each scenario.
In this project, the active power filter was simulated in MATLAB, and the results obtained were as follows: in the first operating condition, when the system connected with separated non linear load, the total harmonic distortion of the source output current was reduced from 21.02% to 8.90% after the inverter has started working. Furthermore, the THD of the inverter output current was increased from 6.74% to756.93%.
In the second operating condition, the system connected with fifteen buses radial network, when the active filter connected near to the power source, the THD of the source output current was reduced from 26.67% to 13.19 %, on the contrary, when the active filter is connected near to the load, the THD of the source output current was reduced from 26.67% to 8.28%. The results confirm that the active filter at this location is effective in reducing THD values.
Keywords: renewable energy sources, active power filter, multi-level inverter, wind turbine, non-linear loads, radial network, total harmonic distortion.