Abstract
Renewable energy systems have been extensively developed and they are attractive to become widespread in the future because they can deliver energy at a competitive price and generally do not cause environmental pollution. However, stand-alone energy systems may not be practical for satisfying the electric load demands, especially in places having unsteady wind speeds with high unpredictability. Hybrid energy systems seem to be a more economically feasible alternative to satisfy the energy demands of several isolated clients worldwide. The combination of these systems makes it possible to guarantee the power stability, efficiency, and reliability. The aim of this paper is to present a comprehensive analysis and to propose a technical solution to integrate a self-excited induction generator in a low power multisource system. Therefore, to avoid the voltage collapsing and the machine demagnetization, the various parameters have to be identified. This procedure allows for the limitation of a safe operating area where the best stability of the machine can be obtained. Hence, the load variation interval is determined. An improvement of the induction generator stability will be analyzed. Simulation results will be validated through experimental tests.
Highlights
In recent decades, renewable energy has become a very attractive solution because it is inexhaustible, non-polluting, and highly adapted to decentralized generation [1,2,3]
Independent wind systems do not produce effective energy for a long time during the year. This is explained by the fact that the wind and solar systems have unpredictable behavior and depend on weather and climatic changes, when they are used independently [9,10]
The use of the wind and the solar PV hybrid system with battery storage is recommended [11]. Such systems are usually equipped with diesel generators to meet the peak load when there is a deficiency of available energy to ensure the requested power in isolated areas [12]
Summary
Renewable energy has become a very attractive solution because it is inexhaustible, non-polluting, and highly adapted to decentralized generation [1,2,3]. Exploitation for the production of electricity is very profitable in isolated areas where the extension of the power grid is very expensive It appears that wind generators are a good alternative for supplying the required energy with affordable prices. Independent wind systems do not produce effective energy for a long time during the year This is explained by the fact that the wind and solar systems have unpredictable behavior and depend on weather and climatic changes, when they are used independently [9,10]. The use of the wind and the solar PV hybrid system with battery storage is recommended [11] Such systems are usually equipped with diesel generators to meet the peak load when there is a deficiency of available energy to ensure the requested power in isolated areas [12]. The combination of the solar PV and wind generation system is considered very good alternative, especially in the case of stand-alone applications [13]
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