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This paper presents a comprehensive control scheme for inverter-based distributed generations (DGs) in grid-connected microgrids (MGs). The proposed control strategy regulates active and reactive power of DGs in order to adjust output voltages of the DGs under balanced/unbalanced loading and fault conditions. In this paper, an adaptive hyper-plane sliding mode controller is developed for positive...
One of the most challenging problems of the electrical engineering in recent years is to replace conventional low-frequency distribution transformers with Solid-State Transformers (SSTs). The SST advantages make future smart grids flexible and cost effective. However, due to some main drawbacks such as low efficiency, it is not adopted in the distribution systems yet. In this paper, optimal design...
In this paper, a novel approach based on General Relativity Search Algorithm (GRSA) for Automatic Generation Control (AGC) of a two area interconnected thermal-thermal power system is described. In the investigated power system, governor dead-band is considered as a nonlinearity. At first, AGC of the power system is analyzed with Proportional Integral (PI) controller and further Proportional Integral...
In this paper, a novel voltage/frequency control is presented for distributed resources (DRs) in an islanded multi-bus microgrid (MG). Its operation principle and control method are explained and analyzed. The proposed scheme reduces coupling between active and reactive power control and also dependence of power sharing to system parameters. Moreover, it leads considerable improvement in the reactive...
Microgrids can provide economic and environmental benefits, but their performance poses great technical challenges in control, protection and energy management. Microgrids can be operated either grid-connected or islanded mode. Such dual configuration capability produces challenges on the design of the protection system. Fault current magnitudes will change depending on the microgrid operating mode...
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