An Adaptive Control for Autonomous Micro-Grid Using Swarm Intelligence Technique

Abstract- This paper aims at improving the quality of the power supply of the micro-grid where the DG units are connected as cluster of micro sources supplying loads. The micro-grid consists of two DG units connected in parallel to configure the grid. This work presents a controller for voltage-frequency regulation. The controller is designed with outer power loop and inner current loop. The proposed strategy for the regulation of voltage and frequency is implemented in two DG units when the micro-grid is islanded. Swarm intelligence technique is applied for the optimum control of micro-grid and to enhance the power quality by auto tuning of the controller

REDUCTION OF ELECTROMAGNETIC INTERFERENCE IN SINGLE PHASE INDUCTION MOTOR BY COATING THE WINDING WITH Al 2 O 3 NANO FILLER MIXED ENAMEL

ABSTRACT -It has been observed that the addition of nano fillers to the enamel can greatly improve the thermal, mechanical and electrical properties of enamel. Al 2 O 3 has been tested as nano filler. The micro particles of Al 2 O 3 are converted into nano particles by using the ball mill method. Scanning electron microscope (SEM) has been used to augment the particle size of the prepared nano particles. The Al 2 O 3 nano filler was mixed with enamel by using ultrasonic vibrator. The enamel filled with the Al 2 O 3 nano filler was coated on the windings of a motor. The values of electromagnetic inference produced by normal induction motor and nano coated induction motor was measured and analysed. There was a reduction of 5 to 15% in the values of the electromagnetic interference produced by the normal induction motor when compared to that of Al 2 O 3 nano filler mixed enamel coated induction motor at various distances. I.INTRODUCTION Dielectric materials were construction materials which were frequently employed in contact with metals. In equipment and installations for the supply of electricity, heat was generated by ohmic losses in conductors, through dielectric losses in insulating materials and through magnetization and eddy-current losses in the iron. The dielectric losses will depend upon the dielectric properties of the insulation such as breakdown strength, partial discharge characteristics, frequency, type of applied voltage, intensity of electric field and loss tangent II.PREPARATION OF NANOFILLERS The micro powders of Al 2 O 3 were crushed into nano powders by Ball Mill method. The SEM images of Al 2 O 3 before and after Ball Mill show the particle size of the powders. The particle size was augment by SEM images. A. SEM analysis Before Synthesisation The micro size particles of Al 2 O 3 were in the range from 10 to 100 µm size. Th

Performance Analysis of Single Phase Induction Motor Coated with Al2O3 Nano Filler Mixed Enamel

Abstract — In the last decades, it has been shown that the properties of the enamel used in the induction motor were improved by adding the nano fillers to it. The performance of the motor was also improved by using the enamel filled with the nano fillers. In this paper, the performance of the single phase induction motor coated with Al2O3 nano filler mixed enamel was analyzed by conducting many tests such as open circuit test, short circuit test, load test and thermal withstanding test on it and the results were compared with that of the normal single phase induction motor. The test results show that there was a tremendous improvement in the performance of the single phase induction motor coated with Al2O3 nano filler mixed enamel when compared to that of the normal single phase induction motor. The efficiency of the induction motor was increased to a maximum 6 % by adding nano filler of Al2O3 to the enamel used as the coating for the windings in the single phase induction motor. The addition of nano fillers to the enamel has increased the temperature withstanding capacity of the induction motor. Hence the life time of the motor will be increased