Search results for: Ali H. Kasem Alaboudy
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Wind Energy > 25 > 6 > 1077 - 1120
The increase in electricity demand places its focus on renewable energies as sustainable energy resources. Wind energy is one of the most important green energy sources. The doubly fed induction generator (DFIG)‐based wind farm has now gained prominence due to its many advantages, such as variable speed operation and autonomous control of active and reactive power. When the DFIG stator windings are...
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Microgrids (MGs) are one of the most feasible structures that accommodate the increased penetration of the intermittent renewable distributed energy sources. Enabling MGs with renewable energy sources is crucial to meet the environmental concerns, and get economic benefits and reliability requirements. This paper details the effect of control strategies of an inverter-based distributed generation...
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This paper presents a modified control strategy to improve the performance of a 3-phase induction motor drive system fed by a standalone PV power source. The main functions of the proposed control strategy are: 1) ensuring successful motor starting, 2) matching the on-site induction-motor pumping load with the available PV power, and 3) forcing the PV system to operate at the maximum power point....
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With the advancements in the variable speed system design and control of wind energy systems, the power capturing capability and controller complexity of these systems are increasing in parallel. Doubly fed induction generators (DFIGs) with a partial-scale size back-to-back converter set are among the promising technologies in wind power generation schemes. This paper discusses the controller performance...
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Voltage fluctuation of grid connected wind turbines (WTs) raises certain restriction for wind power penetration levels. In this paper, a flicker mitigation algorithm is proposed for doubly fed induction generator (DFIG) based WTs. The mitigation algorithm is based on tuning the DFIG power factor according to the equivalent grid impedance seen at the point of common coupling. The proposed algorithm...
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Wind energy conversion systems could produce more power fluctuations than other sources of generation, and, hence, voltage fluctuation is highly expected with wind power plants. This paper addresses the problem of voltage fluctuation caused by constant speed wind turbines that are based on induction generators. Comprehensive wind speed and wind turbine models are used. A flickermeter model is implemented...
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This paper introduces a new optimal technique to estimate the PI gains for current regulated inverter control. The PI controller tuning is accomplished using bacterial foraging optimization (BFO) algorithm to reduce voltage and current harmonic distortions and comply with the local grid requirements and interconnection standards. Robust and decoupled active and reactive power control is achieved....
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IEEE Transactions on Power Delivery > 2011 > 26 > 4 > 2687 - 2696
In this paper, a new passive islanding detection method for grid-connected inverter-based distributed-generation (DG) systems is proposed. A statistical signal-processing algorithm known as estimation of signal parameters via rotational invariance techniques is used to extract new features from measurements of the voltage and frequency at the point of common coupling as islanding indicators. The new...
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Microgrids can be viewed as a group of Distributed Generation (DG) units with the capability of operating connected or isolated from the main grid. Most of the work conducted in the area of microgrids focused on developing new control schemes that can maintain the voltage and frequency within standard limits during grid connected and islanded mode of operation. An issue of equal importance is the...
