Power Quality Enhancement in Hybrid Sustainable Energy Systems Grid-Connected Scheme by Modified Non-dominated Sorting Genetic Algorithm

Vigneshwar A. S.,Shunmugalatha A.,Madhan A. 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.4

In modern power systems integrating renewable energy sources like solar PV and wind, ensuring high-quality power delivery is essential. This article addresses the challenge of enhancing power quality in Hybrid Sustainable Energy Systems connected to the grid. We introduce a novel approach centered on the Unifi ed Power Quality Conditioner (UPQC) and a specialized optimization technique, the Modifi ed Non-dominated Sorting Genetic Algorithm (MNSGA-II) with Proportional Integral controllers. Our solution effi ciently manages voltage levels, simultaneously reducing power loss and Total Harmonic Distortion. Compared to conventional methods such as PID controllers, Genetic Algorithms, and Particle Swarm Optimization, our approach stands out in terms of performance. We implement this methodology using MATLAB Simulink, conducting a range of comprehensive performance analyses. Our primary objective is to enhance power quality by addressing power loss and Total Harmonic Distortion, especially when dealing with non-linear and irregular loads at the point of common coupling. As a result, our MNSGA-II technique, in conjunction with UPQC compensation, signifi cantly reduces harmonics of various orders, leading to an improved power quality environment with corresponding harmonic values of 0.29, 0.19, 0.13, 0.1, 0.09, 0.06, and 0.05.

Real-Time Installation of a Smart Energy Meters Using the Long-Range Network

Madhan A.,Shunmugalatha A.,Vigneshwar A. S. 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.1

Smart Meters (SMs) are becoming increasingly important in today's world, with their research, design, and installation growing at an accelerating rate. The utilization of smart meters in electrical engineering spans a wide range of tasks, from authentic surveillance to the analysis of load patterns in houses. The usage of wireless communications has aided this progress. However, several issues arise when smart meters are implemented, including range, regions without Web access, etc. Long-Range (LoRa) technologies have excellent coverages and minimal-power apparatus, allowing smart meters to be installed in a variety of locales, namely those lacking Web access. This work aims to improve a smart network based on the Long-Range specifcation, which eliminates the issues that most other wireless technologies have. Electrically Changeable Measuring Devices for Residences Utilizing Long-Range (ECMDRUL) and Gateways for Domestic Energy Meters Networks using LoRa (GDEMNL) have been proposed in this work, allowing the construction of smart networks with an extensive range and reduced utilization. The device output was 2.823 kW, max. 3.087 kW, min. 1.7 kW and total production of 276.2 kWh. The load data was max. 2.823 kW, min. 0.616 kW and Avg. 1.86 kW, with total sum of 125.8 kWh and peak of 132.2 kWh. The data showed positive energy balance. The power consumption of each residence ranged from 2.3 to 6.9 kW, with solar-based generation system of Residence #6 being a viable option.

Aerodynamic design optimization of an aircraft wing for drag reduction using computational fluid dynamics approach

Shiva Kumar M.R,Srinath R,Vigneshwar K,Ravi Kumar B. 한국풍공학회 2020 Wind and Structures, An International Journal (WAS Vol.31 No.1

The aircraft industry supports aviation by building aircraft and manufacturing aircraft parts for their maintenance. Fuel economization is one of the biggest concerns in the aircraft industry. The reduction in specific fuel consumption of aircraft can be achieved by a variety of means, simplest and more effective is the one to impose minor modifications in the aircraft main wing or the parts which are exposed to the air flow. This method can lead to a reduction in aerodynamic resistance offered by the air and have a smoother flight. The main objective of this study is to propose geometric design modifications on an existing aircraft wing which acts as a vortex generator and it can reduce the drag and increase lift to drag ratio, leading to lower fuel consumption. The NACA 2412 aircraft wing is modified and designed. Rigorous flow analysis is carried out using computational fluid dynamics based software Ansys Fluent. Results show that saw tooth modification to the main wing shows the best aerodynamic efficiency as compared to other modifications.

Influence of glide path size and operating kinetics on time to reach working length and fracture resistance of Twisted File adaptive and Endostar E3 nickel-titanium file systems

Ramyadharshini, Tamilkumaran,Sherwood, Inbaraj Anand,Vigneshwar, V Shanmugham,Prince, Prakasam Ernest,Vaanjay, Murugadoss The Korean Academy of Conservative Dentistry 2020 Restorative Dentistry & Endodontics Vol.45 No.1

Objectives: This study investigated the influence of glide path size and operating kinetics on the time to reach the working length and the fracture resistance of Twisted File (TF) and Endostar E3 files. Materials and Methods: A total of 120 mandibular single-rooted premolars were selected. Two methods of kinetic motion (TF adaptive and continuous rotary motion) and file systems (TF and Endostar E3) were employed. The files were used in root canals prepared to apical glide path sizes of 15, 20, and 25. The time taken to reach the working length and the number of canals used before the instrument deformed or fractured were noted. Fractured instruments were examined with scanning electron microscopy. Results: The TF system took significantly more time to reach the working length than the Endostar E3 system. Both systems required significantly more time to reach the working length at the size 15 glide path than at sizes 20 and 25. A greater number of TFs than Endostar E3 files exhibited deformation, and a higher incidence of instrument deformation was observed in adaptive than in continuous rotary motion; more deformation was also observed with the size 15 glide path. One TF was fractured while undergoing adaptive motion. Conclusions: No significant difference was observed between continuous rotary and adaptive motion. The TF system and adaptive motion were associated with a higher incidence of deformation and fracture. Apical glide path sizes of 20 and 25 required significantly less time to reach the working length than size 15.

Influence of glide path size and operating kinetics on time to reach working length and fracture resistance of Twisted File adaptive and Endostar E3 nickel-titanium file systems

Ramyadharshini Tamilkumaran,Anand Sherwood Inbaraj,Vigneshwar V Shanmugham,Ernest Prince Prakasam,Vaanjay Murugadoss 대한치과보존학회 2020 Restorative Dentistry & Endodontics Vol.45 No.2

Objectives: This study investigated the influence of glide path size and operating kinetics on the time to reach the working length and the fracture resistance of Twisted File (TF) and Endostar E3 files. Materials and Methods: A total of 120 mandibular single-rooted premolars were selected. Two methods of kinetic motion (TF adaptive and continuous rotary motion) and file systems (TF and Endostar E3) were employed. The files were used in root canals prepared to apical glide path sizes of 15, 20, and 25. The time taken to reach the working length and the number of canals used before the instrument deformed or fractured were noted. Fractured instruments were examined with scanning electron microscopy. Results: The TF system took significantly more time to reach the working length than the Endostar E3 system. Both systems required significantly more time to reach the working length at the size 15 glide path than at sizes 20 and 25. A greater number of TFs than Endostar E3 files exhibited deformation, and a higher incidence of instrument deformation was observed in adaptive than in continuous rotary motion; more deformation was also observed with the size 15 glide path. One TF was fractured while undergoing adaptive motion. Conclusions: No significant difference was observed between continuous rotary and adaptive motion. The TF system and adaptive motion were associated with a higher incidence of deformation and fracture. Apical glide path sizes of 20 and 25 required significantly less time to reach the working length than size 15.