PV-grid Performance improvement through Integrated Intelligent Water Drop Optimization with Neural Network for Maximum Power Point Tracking
A Digital Healthcare Monitoring System with Real-Time Analysis
Advancements in Smart Meter Design and Integration for Enhanced Energy Management and Efficiency
Electric Vehicles in Modern Transportation: Environmental Impacts, Configurations, and Future Trends – A Review
GTO Technique Based Hybrid Power System Controller Design
Design and Development Of Paddy Cutter Using Solar Energy
Design Of Double-Input DC-DC Converter (DIC) Solar PV-Battery Hybrid Power System
Comparison of Harmonics, THD and Temperature Analysis of 3-Phase Induction Motor with Normal Inverter Drive and 5-Level DCMI Drive
Application of Whale Optimization Algorithm for Distribution Feeder Reconfiguration
Detection and Classification of Single Line to Ground Boundary Faults in a 138 kV Six Phase Transmission Line using Hilbert Huang Transform
The Modeling of Analogue Systems through an Object-Oriented Design Method
Circuit Design Techniques for Electromagnetic Compliance
A Technological Forecast for Growth in Solid-State Commercial Lighting using LED Devices
Testing of Analogue Design Rules Using a Digital Interface
Simulation and Transient Analysis of PWM Inverter Fed Squirrel Cage Induction Motor Drives
This work proposes investigation on symmetrical three phase hybrid cascaded multilevel inverter topology with reduced number of switches and is able to create five level output. The main advantage of the proposed work is to reduce the number of switches when compared to the Cascaded Multi Level Inverter (CMLI). The reduced number of switches reduces the switching losses and improves the efficiency of the inverter. The variation of Total Harmonic Distortion (THD) in the inverter output voltage is observed for various modulation indices. Simulation is performed using MATLAB-SIMULINK. By comparing the various PWM techniques, such as COPWM-1, COPWM-2, COPWM-3 and COPWM-4, it is observed that Carrier Overlapping Pulse Width Modulation-3 (COPWM-3) provides output with relatively low distortion for all strategies and better DC bus utilization is obtained in (COPWM-1) and also comparing the various variable amplitude techniques, such as VACOPWM-1, VACOPWM-2, VACOPWM-3 and VACOPWM-4, it is observed that Variable Amplitude Carrier Overlapping Pulse Width Modulation-3 (VACOPWM-3) provides output with relatively low distortion for all strategies and better DC bus utilization. Finally comparing the various PWM techniques with the various variable amplitude techniques, It is observed that Variable Amplitude Carrier Overlapping Pulse Width Modulation-3 (VACOPWM-3) provides output with relatively low distortion for all strategies and better DC bus utilization is obtained in (VACOPWM-2).
This paper presents a novel method for the determination of temperature rise in rotating electrical machine. Rise in the winding temperature was determined from the estimated values of winding resistance during the heat run test conducted as per IEC standard. The estimation of hot resistance was modeled using multiple variable linear regression . The modeled hot resistance helps to find the load losses at any load situation without using complicated measurement set –up. This technique was applied for the hot resistance estimation for Switched Reluctance Machine using the input variables as cold resistance, ambient temperature and temperature rise. The results are compared and they show a good agreement between measured and the computed values. The proposed method was verified using experimental results obtained from temperature rise test on a 2 H.P 8/6 Switched Reluctance Machine.
This paper presents a matrix converter for power flow management. The matrix converter has several advantages over traditional rectifier-inverter type power frequency converters. It provides sinusoidal input and output waveforms, with minimal higher order harmonics and no sub harmonics. The matrix converter having the ability to generate multilevel output voltages, this converter is able to produce better quality output waveforms than conventional matrix converter in terms of harmonic content. This paper gives the performance of a matrix converter and the qualitative analysis of some performance parameters is carried out. Some numerical results based on a simulation model of a matrix converter system are also presented. The simulations results of different load conditions are presented .The open loop controlled system is simulated and the waveform output is predicted at various conditions.
In this paper, an ac/dc converter is presented that can boost very low ac voltages to a higher dc voltage. The converter is based on a new hybrid form of boost converter and a buck boost converter and it is suitable for power harvesting applications too. The measured prototype can supply 3.3V by converting an input voltage of 400mV delivered by an electromagnetic microgenerator. Detailed analysis of converter is carried out and based on that control schemes are proposed to operate the converter.
Because of increased distributed energy generation in medium voltage systems, handling of short circuits becomes problematic as the short circuit power is increased. Hence in future classical mechanical circuit breakers which are being used for the protection of power system and its components from the abnormal conditions will not be able to handle the fault current. It has already proven that the usage of power semiconductor devices could lead to reduced current values and voltage distortion during a short circuit failure. The Solid State Circuit Breakers, based on modern high power semiconductors, offer enormous advantages when compared to mechanical circuit breaker with respect to speed and life. This increases the voltage quality and also improves the transient stability during short circuit as the Solid State Circuit Breakers works faster than the conventional mechanical circuit breaker. A new topology developed for SSCB can be used to protect the power system to enhance reliability. This paper presents different three phase fault analysis of a power system with Solid State Circuit Breaker to estimate the performance of the SSCB during abnormal conditions. The simulations on the model two bus system have been performed to access the effectiveness of SSCB during faults. It is shown that SSCB is an effective choice which can replace the existing mechanical circuit breaker. The results of three phase short circuit, Line to Ground and open Circuit faults are presented.
This paper proposes an application of Differential Evolution Technique(DE) for solving short- term scheduling problem.Generally Short-term hydrothermal scheduling involves the hour by hour scheduling of all generation on a system to achieve minimum production cost.A set of starting conditions is given and the optimal hourly schedule that minimizes the desired objective,while meeting hydraulic and steam constraints is sought and solved using Differential Evolution. . The results are examined to validated the effectiveness of the algorithm in comparision with other Meta heuristic algorithms like GA, GS, IFEP, SA and PSO.