Abstract
The use of wind energy is increased due to the high demand for sustainable energy. The penetration of wind energy in electrical networks might have several effects on load flow and power system stability. In this research, the transient stability of the IEEE 9-Bus system integrated with Doubly Fed Induction Generator (DFIG) is analyzed. Additionally, different penetration levels of a wind farm are considered. With a 5% penetration of wind energy, the maximum power angle of the synchronous generator is around 129 deg, which is quite similar to the existing system. In contrast, the power angle increases to 140 deg after adding more wind turbines with 15% wind farm penetration. Then, the system loses stability with a 25% penetration of wind energy. The results indicate that the high penetration of wind energy has a destabilizing impact on the studied network. Moreover, the location of the wind farm affects transient stability. This research intends to contribute towards assessing the stability of the power system integrated DFIG. Hence, this study will support the increase of using wind energy in power systems rather than conventional power plants and evaluate the stability to enable the reliability of alternative energy sources in the grid.
Highlights
Over the last two decades, the growing expansion in renewable energy has increased due to the environmental impacts [1], lack of fossil fuels, and growth in power demand [2]
We found that the 3-phase fault simulated near Bus7 at Line5-7 has the largest power angles compared with faults occurred in other locations
The time-domain simulation of the power angle is considered during the fault
Summary
Over the last two decades, the growing expansion in renewable energy has increased due to the environmental impacts [1], lack of fossil fuels, and growth in power demand [2]. The integration of renewable energy technology, such as photovoltaic and wind energy, into the network is a useful development to improve the power system performance [1]. Wind energy is one of the promising sources used in modern power systems [2,3]. The development of wind technology includes the increase in the rotor diameters and the height of towers [4]. In addition to the installation methods, there is another development in the type of generator to enhance the efficiency of the wind technology, such as squirrel cage induction generator and Doubly Fed Induction Generators (DFIG). Wind energy relies on several factors, including the speed of the wind and weather. The high penetration of wind energy may lead to power system issues, such as power system instability during the disturbances
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