Development of Wave Turbine Emulator in a Laboratory Environment

2013 ◽  
Vol 14 (4) ◽  
pp. 363-372
Author(s):  
U. Vinatha ◽  
P. Vittal K
Keyword(s):  
Electronic Device ◽  
Turbine Rotor ◽  
Feedback Mechanism ◽  
Feedback Signal ◽  
Actual Behavior ◽  
Power Electronic ◽  
Test Environment ◽  
Laboratory Environment ◽  
Ac Drive ◽  
Electrical Generator

Abstract Wave turbine emulator (WTE) is an important equipment for developing wave energy conversion system. The emulator reflects the actual behavior of the wave turbine by reproducing the characteristics of real wave turbine without reliance on natural wave resources and actual wave turbine. It offers a controllable test environment that allows the evaluation and improvement of control schemes for electric generators. The emulator can be used for research applications to drive an electrical generator in a similar way as a practical wave turbine. This article presents the development of a WTE in a laboratory environment and studies on the behavior of electrical generator coupled to the emulator. The structure of a WTE consists of a PC where the characteristics of the turbine are implemented, ac drive to emulate the turbine rotor, feedback mechanism from the drive and power electronic equipment to control the drive. The feedback signal is acquired by the PC through an A/D converter, and the signal for driving the power electronic device comes from the PC through a D/A converter.

High Power Inverter Circuit from GTO to IGCT and its Application on AC Driving Locomotive

2011 ◽  
Vol 354-355 ◽  
pp. 1394-1399
Author(s):  
Su Rong Qu ◽  
Zhong Yang Zhang
Keyword(s):  
High Power ◽  
Electronic Device ◽  
Superior Performance ◽  
Power Electronic ◽  
Large Power ◽  
Ac Drive ◽  
New Type ◽  
Inverter Circuit ◽  
Type Power ◽  
Paper Author

IGCT is a kind of new type power electronic device which developed from GTO and IGBT . In this paper, Author based on analysis of the internal structure of GTO, shows how GTO development IGCT through technical methods.Through simulation of its off and on performance, the work curve and comparing results of the two devices are given. Then on two components of the inverter circuits are analyzed and compared. Thinking in large power AC drive locomotive, IGCT inverter is greatly simplifier than GTO inverter circuit, and superior performance,it will become the main converter for AC driving locomotive.

scholarly journals Topologically Rectangular Grids in the Parallel Simulation of Semiconductor Devices

VLSI Design ◽  
1998 ◽  
Vol 6 (1-4) ◽  
pp. 91-95 ◽  
Author(s):  
A. Asenov ◽  
A. R. Brown ◽  
S. Roy ◽  
J. R. Barker
Keyword(s):  
Simulated Annealing Algorithm ◽  
Semiconductor Device ◽  
Electronic Device ◽  
Device Simulation ◽  
Power Electronic ◽  
Two Dimensional ◽  
Solution Strategy ◽  
Rectangular Grids ◽  
Annealing Algorithm ◽  
2D And 3D

Topologically rectangular grids offer simplicity and efficiency in the design of parallel semiconductor device simulators tailored for mesh connected MIMD platforms. This paper presents several approaches to the generation of topologically rectangular 2D and 3D grids. The effects of the partitioning of such grids on different processor configurations are studied. A simulated annealing algorithm is used to optimise the partitioning of 2D and 3D grids on two dimensional arrays of processors. Problems related to the discretization, parallel matrix generation and solution strategy are discussed. The use of topologically rectangular grids is illustrated through the example of power electronic device simulation.

scholarly journals Negative feedback in ants: crowding results in less trail pheromone deposition

2013 ◽  
Vol 10 (81) ◽  
pp. 20121009 ◽  
Author(s):  
Tomer J. Czaczkes ◽  
Christoph Grüter ◽  
Francis L. W. Ratnieks
Keyword(s):  
Negative Feedback ◽  
Trail Pheromone ◽  
Distribution Networks ◽  
Feedback Mechanism ◽  
Lasius Niger ◽  
Feedback Signal ◽  
Control Mechanisms ◽  
Negative Feedback Mechanism ◽  
Self Organized ◽  
Fold Reduction

Crowding in human transport networks reduces efficiency. Efficiency can be increased by appropriate control mechanisms, which are often imposed externally. Ant colonies also have distribution networks to feeding sites outside the nest and can experience crowding. However, ants do not have external controllers or leaders. Here, we report a self-organized negative feedback mechanism, based on local information, which downregulates the production of recruitment signals in crowded parts of a network by Lasius niger ants. We controlled crowding by manipulating trail width and the number of ants on a trail, and observed a 5.6-fold reduction in the number of ants depositing trail pheromone from least to most crowded conditions. We also simulated crowding by placing glass beads covered in nest-mate cuticular hydrocarbons on the trail. After 10 bead encounters over 20 cm, forager ants were 45 per cent less likely to deposit pheromone. The mechanism of negative feedback reported here is unusual in that it acts by downregulating the production of a positive feedback signal, rather than by direct inhibition or the production of an inhibitory signal.

Multiphysics Design and Analysis Simulations for Power Electronic Device Wirebonds

2003 ◽  
Author(s):  
Patrick W. Wilkerson ◽  
Andrzej J. Przekwas ◽  
Chung-Lung Chen
Keyword(s):  
Heat Dissipation ◽  
Electronic Device ◽  
Electronic Devices ◽  
Thermal Conditions ◽  
Simulation Software ◽  
Operating Conditions ◽  
Power Electronic ◽  
Stress Concentrations ◽  
Multiphysics Simulation ◽  
Multiphysics Simulations

Multiscale multiphysics simulations were performed to analyze wirebonds for power electronic devices. Modern power-electronic devices can be subjected to extreme electrical and thermal conditions. Fully coupled electro-thermo-mechanical simulations were performed utilizing CFDRC’s CFD-ACE+ multiphysics simulation software and scripting capabilities. Use of such integrated multiscale multiphysics simulation and design tools in the design process can cut cost, shorten product development cycle time, and result in optimal designs. The parametrically designed multiscale multiphysics simulations performed allowed for a streamlined parametric analysis of the electrical, thermal, and mechanical effects on the wirebond geometry, bonding sites and power electronic device geometry. Multiscale analysis allowed for full device thermo-mechanical analysis as well as detailed analysis of wirebond structures. The multiscale simulations were parametrically scripted allowing for parametric simulations of the device and wirebond geometry as well as all other simulation variables. Analysis of heat dissipation from heat generated in the power-electronic device and through Joule heating were analyzed. The multiphysics analysis allowed for investigation of the location and magnitude of stress concentrations in the wirebond and device. These stress concentrations are not only investigated for the deformed wirebond itself, but additionally at the wirebond bonding sites and contacts. Changes in the wirebond geometry and bonding geometry, easily changed through the parametrically designed simulation scripts, allows for investigation of various wirebond geometries and operating conditions.

A Novel Harmonic Detection Method Based on Wavelet Analysis

2014 ◽  
Vol 945-949 ◽  
pp. 2057-2061
Author(s):  
Lei Wu ◽  
Ya Zhou Gao
Keyword(s):  
Wavelet Analysis ◽  
Lower Cost ◽  
Reactive Power ◽  
Electronic Device ◽  
Power Electronic ◽  
Harmonic Suppression ◽  
Harmonic Detection ◽  
Power Filter ◽  
Low Pass ◽  
Low Pass Filters

Active power filter (APF) is a new power electronic device used for reactive power compensation and dynamic harmonic suppression. Its performance depends on the highly precise detection of harmonic and reactive current. In view of the low pass filters defection in traditional ip-iq method, this paper proposes a wavelet filter based on wavelet analysis. This algorithm could attain higher detection precision with lower cost. The simulate results illustrate the efficiency and accuracy of it.

Energy Storage System and Its Power Electronic Interface

2020 ◽  
pp. 309-321
Author(s):  
Baseem Khan ◽  
Samuel Degarege ◽  
Fsaha Mebrahtu ◽  
Hassan Alhelou
Keyword(s):  
Energy Storage ◽  
Electronic Device ◽  
Performance Indicator ◽  
Power Grid ◽  
Supply And Demand ◽  
Storage System ◽  
Cost Effective ◽  
Energy Storage System ◽  
Power Electronic ◽  
System Energy

This chapter examines the modeling and simulation of energy storage (battery, flywheel, etc.) systems interfaced to the power grid by using power electronic device, like chopper module, Rectifier module, and filter circuits, which are essential to the load balance between supply and demand, and to eliminate harmonics and to ensure efficient, cost effective, and reliable operations. Energy storage system in power grid is the same as memory in computer system. Energy efficiency is a key performance indicator for energy storage system. The energy storage system is the most promising component to enhance the system reliability and flexibility.

Energy Storage System and Its Power Electronic Interface

2022 ◽  
pp. 183-195
Author(s):  
Baseem Khan ◽  
Samuel Degarege ◽  
Fsaha Mebrahtu ◽  
Hassan Alhelou
Keyword(s):  
Energy Storage ◽  
Electronic Device ◽  
Performance Indicator ◽  
Power Grid ◽  
Supply And Demand ◽  
Storage System ◽  
Cost Effective ◽  
Energy Storage System ◽  
Power Electronic ◽  
System Energy

This chapter examines the modeling and simulation of energy storage (battery, flywheel, etc.) systems interfaced to the power grid by using power electronic device, like chopper module, Rectifier module, and filter circuits, which are essential to the load balance between supply and demand, and to eliminate harmonics and to ensure efficient, cost effective, and reliable operations. Energy storage system in power grid is the same as memory in computer system. Energy efficiency is a key performance indicator for energy storage system. The energy storage system is the most promising component to enhance the system reliability and flexibility.

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