Variable frequency transformer simulation software

This is a windows based software for designing small transformers working on line frequency 50 60 hz and high frequency for use in smps. Based on the models developed in chapter 4 both wind turbine systems depending on the different converters are simulated. This paper presents different methods to determine the parameters for the equivalent electrical circuit model of a high frequency planar transformer. In this paper, the pmsg is connected through variable frequency transformer for different wind speeds. Application of variable frequency transformer vft for grid. These starters are used for dynamic motor acceleration calculation and reporting in modules such as motor starting analysis and transient stability analysis. A discussion about the choice of motor and generator models is developed and the comparison between calculation methods is presented.

Variable frequency transformer vft is a controllable bidirectional transmission device that can transfer power between asynchronous networks. For over excitation condition there are two analyses has been seen here those are respectively variable voltage constant frequency vvcf and constant voltage variable frequency ccvf. Here is the list of best free circuit simulation software for windows. Optimizing design and simulation of planar transformers based on integrated software platform conference paper may 2008 with 56 reads how we measure reads.

Sparameter simulation controller default sweep variable freq sweep plan can also be used see next slide. My experience with ferrite and switchers is that it is usually nearly a factor of two higher. Variable voltage variable frequency control of threephase induction motor in closed loop is the significant feature of the thesis work. Variable frequency tranformer file exchange matlab central.

The first method is implemented in the circuit simulation software utilizing a 1d electromagnetic analysis. Magnetic frequency response analysis in jmag for our benchmarks we used a step down three phase transformer with a turn ratio of 10to1 and the primary voltage of 141. If you had enough data on the electromagnetic it would be possible to calculate the transformer ratio but obtaining a core with the right characteristics and winding it is another thing all together. At the beginning it can seem quite difficult to use when faced with a blank schematic. Variable speed control of ac electrical machines makes use of forcedcommutated electronic switches such as igbts, mosfets, and gtos. Simulating power transformers in magnet 2d3d mentor infolytica. Basically, it is a rotatory transformer whose torque is adjusted in order to control the power flow. So to simulate all these condition of transformer a software package is used. Direct driven wind energy conversion system connected to load. Two and three winding transformers with phase shift for control of the load flow. Simulation1 three phase inverter and variable frequency. We assume here that the initial state, this frequency is the nominal frequency. These freeware let you design as well as simulate circuits on your pc.

Poweresim free smps switching power supply transformer. Sep 20, 2012 variable frequency transformer vft is used as a controllable bidirectional transmission device that can transfer power between asynchronous networks and functionally is similar to backtoback hvdc. Where can i get simulink model data of variable frequency. Using these software, you can actually checkout how a circuit will behave, and also know additional information including its waveform. Either way, simulation data results in an s matrix in the data set for the specified range and points. Texts that will be displayed have been partly translated by an automatic translation system. The variable frequency transformer model for power flow solutions is represented as a phaseshifting transformer, where the phase shift angle is adjusted to maintain the active power exchange within. Use twice these values in simulation since the resistance at frequency is higher than the dc value. Solv is a powerful simulation program that will calculate current and voltage distortion levels by simulating the mirus lineator and variable speed drive vsd variable frequency drive vfd based on your load requirement. Here, s is the matrix, 30 is the value in db, and 51 points used to draw the circle. A variety of drive capabilities are simulated by the software, including running the drive using a pendant station, monitoring inputoutput status, motor loading, and alarmsfaults. A variablefrequency transformer vft is used to transmit electricity between two asynchronous or synchronous alternating current frequency domains.

Where, e emf of transformer in volt v f frequency in hertz hz 50hz. Stator is connected to one power system via a stepup transformer. Simulation of power transformer for study of inrush. Poweresim free smps power supply design and transformer design, magnetic design, simulation, circuit analysis software. Sanjeet kumar dwivedi, in modeling and control of power electronics. Implementation of a vft model in psse suitable for power. Select from six commonly used pumping applications ranging from simplex to triplex. Most asynchronous grid interties use highvoltage direct current converters, while synchronous grid interties are connected by lines and ordinary transformers, but without the ability to control.

In steady state, the frequency is the same everywhere in the system. Nmvft is a new technology which is used for vf control of induction motors. Frequency scanning is performed for a specified range of frequencies. Pdf new model variable frequency transformer nmvft a. Finally, the implementation of the magnetic domain in the commercial simulation software plecs is described. Control engineering simulation software shows how a. Variablefrequency resonant withstand voltage test system. Jun 22, 2015 this feature is not available right now. Optimizing design and simulation of planar transformers. The saturable core model can be extended to model frequency depending losses and hysteresis. Where can i get simulink model data of variable frequency transformer.

The connection pattern in the transformer and load sides are. Continuous development of appropriate software packages makes simulation of. Eaton s variable frequency drives, also known as adjustable frequency drives, are designed and manufactured for applications requiring ultracompact solutions, clean power or future configurability in mind. The vft system is based on a combination of hydro generator and transformer. Llc variable frequency resonant converter below is a plecs demo model of an isolated dcdc resonant converter operated under frequency control. Included is a highly realistic simulation of a lighting circuit with 20 actual faults to solve. I am simulating the variable frequency transformer wound rotor induction generator. Doyon, variable frequency transformer an overview, in proc. The ac side of the hbridge is connected to the primary side of a high frequency transformer via a seriesconnected resonant inductor and capacitor. The second method uses a 3d electromagnetic analysis and is implemented in a finiteelement analysis software. Variable frequency transformer vft is an asynchronous network interconnection device with a new conception and superior performance. This variable frequency seriesresonant voltage withstand test equipment is comprised of frequency power, exciting transformer, reactors and voltage divider, for testing different electric apparatus.

Asynchronous machines fed by pulse width modulation pwm voltage sourced converters vsc are nowadays gradually replacing the dc motors and thyristor bridges. For changing the motor speed we should change the frequency of sine wawes which is. Tested transformer or resonant circuit is not cut off regardless the inside failure of variable frequency power supply or mains electricity failure. Modelling and simulation of stepup and stepdown transformers. The vft provides a simpler way to control power between electrical grids than has previously been available. Highfrequency planar transformer parameter estimation. It introduces the main technical issues of variable frequency transformers vft systematically, including its basic construction, theory equations, and simulation models. Shortcircuit test simulation system of transformer with shunt. Baker hughes centrilift autographpc is an artificial lift and application simulation software. Mar 25, 2017 matlab simulation of three phase transformer.

To understand how the frequency speed controller operates, it is necessary to understand how the vsd supplies variable voltage and frequency for speed control. Learn electrcial troubleshooting software for further education and training troubleshooting technics. Main aim of power converter system pcs is to provide regulated ac voltage and frequency. A variable frequency transformer is a doubly fed electric machine resembling a vertical shaft hydroelectric generator with a threephase wound rotor, connected by slip rings to one external power circuit. Two control types are provided to simulate vfd operations during motor starting. Include many smps and power electronics circuit, schematics, topologies, theory of operation, application note, circuit analysis, on line educational course material. Variable frequency transformers ge energy revolutionizes the world of transmission solutions with its new variable frequency transformer vft. This distinguishes variable frequency power supply from common noload transformers. Variable frequency drive also called frequency inverter, ac drive etc. There are laminations of steel stacked inside a stator frame. Simulate variable speed motor control variable speed control of ac electrical machines makes use of forcedcommutated electronic switches such as igbts, mosfets, and gtos. Ece145a218a a short tutorial on using agilent ads ads is capable of many different types of circuit analysis, electromagnetic models, and active device models. This paper presents the implementation of a variable frequency transformer, suitable for planning studies of asynchronous links, using the power system simulator for engineering software. Etap software has been used for motor starting analysis.

For this purpose, a number of simulation studies have been carried out on power flow from pmsg to the grid. Variable voltage variable frequency speed control of. Cyme power engineering software motor starting analysis. Readers will then gain an indepth discussion of its control system, operation. Use of motor protection circuit breakers with variable frequency drives introduction a motor branch circuit, including a variable frequency drive vfd and one or more motor protection circuit breakers mpcbs, is a complex system and its performance depends on all components, devices, configuration and their interconnection. Transformer tap changer, continuous regulator with steps and the function to control the voltage on the nearest as well as on the more remote bus.

Mirus international harmonic mitigation, transformers. The variable frequency transformer vft is a controllable, bidirectional transmission device that can transfer power between asynchronous networks. Malabsimulink is one of the most popular software in this field. It support led driver design, pfc, notebook adaptor, phone. It introduces the main technical issues of variable frequency transformers vft systematically, including its basic construction, theory equations, and simulation. Hence, this paper aims to explore the possibility of grid integration of pmsg based wtg using vft. Modeling, simulation, and analysis of variable frequency transformers. Application simulator stimulate typical pump applications. This paper proposes a variable frequency transformer for wind energy. Matlab simulation of three phase transformer youtube. A new simulink model to study the vft performance when.

Transient simulation of magnetic circuits using the. This software is also used to verify the modeling of the converters chapter 4. Motor starting analysis motor starting studies motor. With no applied torque, the shaft rotates due to the difference in frequency between the networks.

Mathematical model and simulation analysis of variable. Simulation palettes have specific measurement equations you set the arguments. Simulation of 40 kva, 400 hz power converter system. Pentium 100 mhz, 24 mb ram, 10 mb disk space, cd rom drive, color monitor, parallel port with windows 95 or higher preferred screen resolution 800 x 600 pixels screen shot of the ordinary transformer design. In this paper the basic structure and working principle of vft are presented and a mathematical model of vft is built,and the functional relation between the transmission power and driving torque of vft are derived.

Variable frequency transformer vft is a controllable bidirectional transmission device that can transfer power between asynchronous. With no applied torque, the shaft rotates due to the difference in frequency between the networks connected to the rotor and stator. Static stepless simulation software is designed for. A particular focus is made on motor starting methods when direct on line is not possible, including soft starter simulation and vsd representation. This paper describes the basic concept of a new model variable frequency transformer nmvft. Transformer tap changer, continuous regulator with steps and. Metro train simulation metro train is a type of highcapacity public transport generally found in metropolitan areas. Simulation model of transformer shortcircuit test with variable frequency source and shunt capacitor 651 wang lidi et al. Three phase inverter and variable frequency drive simulation with matlab. Appendix ii minimumsize transformer design program.

Departmet of electricalelectronic engineering, maritime academy of nigeria, oron, nigeria. Simulation of inverter circuit using multism and proteus akhikpemelo, a. Ordinary transformers for use in linear power supplies, inverters etc. Simulation of inverter circuit using multism and proteus a akhikpemelo, p matsunde, f. Ansys maxwell is the industryleading electromagnetic field simulation software for the design and analysis of electric motors, actuators, sensors, transformers and other electromagnetic and electromechanical devices. The llc converter is a dcdc converter with a front end hbridge.

Generally, the function of transformers in such arrangements is to couple an audio frequency source, which may. This enhanced simulation capability helps achieve faster agreement between simulation and measured performance, permitting faster design cycles, lower design cost, and greater likelihood of first pass success. Variable speed wind turbine equipped with a synchronous. Shortcircuit test simulation system of transformer with. It is an electric device to change utility power source to variable frequency to control ac motor in variable speed operation. Ironcore transformers are operated over a wide range of audio frequencies in communication circuits such as radio frequency transmitters, radio receivers, and in conjunction with telephone circuits. The impulse drive simulation software lets the user experience how a drive works to help simplify the overall use and serviceability of impulse variable frequency drives vfds. The ac electric motor used in a vfd system is usually threephase induction motor. Variable speed drive basics are presented in a simple and easy way with explanation graphs. Abstract an inverter is an electrical device that converts direct current dc to alternating current ac. The important factors which attract the passengers are mainly travel time, ticket price, punctuality, comfort level and safety. Its a powerful tool to give a comprehensive and userfriendly system design. A matlabsimulink model to study the performance of the vft for.

Ac motor, main drive controller assembly, and driveoperator interface. The cyme power engineering software features an optional motor starting analysis module for dynamic, locked rotor and maximum start size analysis which is dedicated to simulating the effects of induction and synchronous motor starting in threephase electric power systems. This book is an allinone resource on the development and application of variable frequency transformers to power systems and smart grids. The magnetizing inductance of the transformer, along with the inductor and capacitor, form the llc resonant tank. Comparison of simulation tools atpemtp and matlabsimulink for time domain power system transient studies meenu kanwar, komal arora, sawan kumar sharma abstract. A basic tutorial on computer simulation of phase controlled rectifiers using psim. To view any text in its original language english, leave the mouse pointer on. Use of motor protection circuit breakers with variable. Ppt modeling, simulation, and analysis of variable frequency.

The line frequency transformers are divided into two categories, 1. Zhou, digital simulation of variable frequency transformers for asynchronous interconnection in power system. This design does not employ any power electronic converter for wind energy conversion system and harmonics can be diminished using the variable frequency transformer. The output voltage of the converter is controlled by changing the switching frequency of the semiconductors.

A variablefrequency transformer is a doubly fed electric machine resembling a vertical shaft hydroelectric generator with a threephase wound rotor, connected by slip rings to one external power circuit. Waveshaping techniques for power quality improvements in variable frequency ac drive. Electrical training and troubleshooting software training. The below block diagram illustration depicts a typical threephase ac variable speed drive system. This brief tutorial will get you started using the simplest and most basic operations. Etap power system analysis software includes motor starters such as conventional starters, softstarters and variable frequency drive. Design of highdensity transformers for highfrequency highpower.

The out power thus generated in vf mode has been practically verified. This paper presents the possibility of grid interconnection of permanent magnet synchronous generator pmsg based wind turbine generator wtg using variable frequency transformer vft. It avoids both hvdc link and facts based power transmission control system. This software was designed to simulate typical pump applications using the iqpump or iqpump micro drive. Using the permeancecapacitance analogy it is shown how variable permeances are employed to model saturation of the core material. Simulation of power transformer for study of inrush and. Windings are configured into a three phase four pole arrangement. Converter and variable frequency transformer for power flow control in a weak interconnection, presented at 2007 ieee power engineering society general meeting, tampa, fl, usa 12 g. The ac electric motor used in a vfd system is usually a threephase induction motor.

This technique is valuable, not least for treating harmonic matters. Variable frequency transformers for large scale power systems. Initialization within each component models will be presented at the same time as the description thereof. Conclusions and future works in this work, the simulation model of shortcircuit test of transformer is designed. A digital simulation model of nmvft and its control system are developed using matlab. Motor starting analysis motor acceleration software. Eced3901 ltspice iv time and frequency simulation youtube.

Three phase inverter and variable frequency drive simulation with matlab correction. The proposed high frequency transformer isolated acdc converters used for. Etap power system analysis software includes motor starters such as. Frequency transformer an overview sciencedirect topics. The variable frequency transformer consists of a stator which is much like the stator of a hydro generator. In this webinar we explore power transformer applications of magnet, in a 2d3d environment. A variablefrequency drive is a device used in a drive system consisting of the following three main subsystems. This design does not employ any power electronic converter for wind energy. Mirus international is a leader in designing and manufacturing power quality improvement products that include harmonic filters, transformers, autotransformers and data center power distribution equipment. Lewis research center summary users of this program are relieved of most computational details, while maintaining control over most engineering decisions, in the design of toroidal transformers for use in parallel inverter circuitry. Motor starting analysis motor starting studies motor acceleration.