Papers by brahmaiah upputuri
This report presents a new developed Matlab/Simulink Toolbox for wind turbine applications. This ... more This report presents a new developed Matlab/Simulink Toolbox for wind turbine applications. This toolbox has been developed during the research project "Simulation Platform to model, optimize and design wind turbines" and it has been used as a general developer tool for other three simulation tools: Saber, DIgSILENT, HAWC. The report provides first a quick overview over Matlab issues and then explains the structure of the developed toolbox. The attention in the report is mainly drawn to the description of the most important mathematical models, which have been developed in the Toolbox. Then, some simulation results using the developed models are shown. Finally, some general conclusions regarding this new developed Toolbox as well as some directions for future work are made.
This report presents a new developed Matlab/Simulink Toolbox for wind turbine applications. This ... more This report presents a new developed Matlab/Simulink Toolbox for wind turbine applications. This toolbox has been developed during the research project "Simulation Platform to model, optimize and design wind turbines" and it has been used as a general developer tool for other three simulation tools: Saber, DIgSILENT, HAWC. The report provides first a quick overview over Matlab issues and then explains the structure of the developed toolbox. The attention in the report is mainly drawn to the description of the most important mathematical models, which have been developed in the Toolbox. Then, some simulation results using the developed models are shown. Finally, some general conclusions regarding this new developed Toolbox as well as some directions for future work are made.
This report presents a new developed Matlab/Simulink Toolbox for wind turbine applications. This ... more This report presents a new developed Matlab/Simulink Toolbox for wind turbine applications. This toolbox has been developed during the research project "Simulation Platform to model, optimize and design wind turbines" and it has been used as a general developer tool for other three simulation tools: Saber, DIgSILENT, HAWC. The report provides first a quick overview over Matlab issues and then explains the structure of the developed toolbox. The attention in the report is mainly drawn to the description of the most important mathematical models, which have been developed in the Toolbox. Then, some simulation results using the developed models are shown. Finally, some general conclusions regarding this new developed Toolbox as well as some directions for future work are made.
turbine generator (WTG) technologies. The models are generic in nature and manufacturer independe... more turbine generator (WTG) technologies. The models are generic in nature and manufacturer independent. These models are implemented on commercially available dynamic simulation software platforms like PSCAD/EMTDC and MATLAB/SIMULINK.
Wind turbine dynamics are usually studied with a fairly simple model of the power system -and vic... more Wind turbine dynamics are usually studied with a fairly simple model of the power system -and vice versa, aeroelastic properties of the wind turbine itself are fairly simple or non-existent in network studies. This paper describes how three commercial programs are used together for continuous, simultaneous and adjoint simulation. A multibody system code ADAMS is used for modeling the turbine, the control system of the turbine is modeled in Matlab/Simulink and the electrical components in PSCAD/EMTDC. A simulation example is shown and possible usage of the system is discussed.
The aim of this work is to analyze a typical configuration of a Wind Turbine Generator System (WT... more The aim of this work is to analyze a typical configuration of a Wind Turbine Generator System (WTGS) equipped with a Variable Speed Generator. Nowadays, doublyfed induction generators are being widely used on WTGS, although synchronous generators are being extensively utilized too. There are different types of synchronous generators, but the multi-pole Permanent Magnet Synchronous Generator (PMSG) is chosen in order to obtain its model. It offers better performance due to higher efficiency and less maintenance since it does not have rotor current and can be used without a gearbox, which also implies a reduction of the weight of the nacelle and a reduction of costs. Apart from the generator, the analyzed WTGS consists of another three parts: wind speed, wind turbine and drive train. These elements have been modeled and the equations that explain their behavior have been introduced. What is more, the whole WTGS has been implemented in MATLAB/Simulink interface. Moreover, the concept of the Maximum Power Point Tracking (MPPT) has been presented in terms of the adjustment of the generator rotor speed according to instantaneous wind speed.
In this paper a prototype of the electrical part of a variable speed wind turbine is considered, ... more In this paper a prototype of the electrical part of a variable speed wind turbine is considered, equipped with a permanent magnet synchronous generator. The modeling of the generator and power electronics interface is checked with measurements realized in the prototype under both steady state and dynamic conditions. Measurements as well as control functions are performed by using a microprocessor. The outcome of the simulation and experimental work are actually utilized in the development of a 25 kW wind turbine, in the frame of a research project.
A permanent magnet synchronous generator (PMSG) variable speed wind turbine connected to an elect... more A permanent magnet synchronous generator (PMSG) variable speed wind turbine connected to an electrolyzer and a battery model system is presented in this paper. Hydrogen gas could be produced from the model system, when a variable wind speed is applied to the PMSG driven variable wind turbine. The simulation results presented shows the nature of some of the variables of the PMSG wind driven turbine and the hydrogen gas produced as the wind speed varies with time.
This paper presents the implementation of a model for a permanent magnet motor on a real time dig... more This paper presents the implementation of a model for a permanent magnet motor on a real time digital simulator. The conventional interfaced model approach popular in some emt-type programs is shown to be inappropriate for real-time simulators, because it is more susceptible to numerical instability. The paper introduces an 'embedded' phase domain model which reduces numerical instabilities.
This paper focuses on the modeling and control of WECS (Wind Energy Conversion System) in a grid ... more This paper focuses on the modeling and control of WECS (Wind Energy Conversion System) in a grid connected system through PWM converters with DC link. A Wind Power Plant which is comprised of wind turbines are connected to Synchronous Generator with Multimass Torsional Shaft Interface modeled and designed. The output power of the generator is transmitted to Grid bus through PWM rectifier (to convert AC to DC) and a STATCOM based PWM inverter. This multi-level inverter convert DC power into ac power at desired output and frequency through a transformer .Varying the firing angle of converters simulation results show the effectiveness of the STATCOM based PWM converter presented in this paper using PSCAD/EMTDC software.
The thesis is to focus on direct driven permanent magnet synchronous generators (PMSG) with diode... more The thesis is to focus on direct driven permanent magnet synchronous generators (PMSG) with diode rectifiers for use in offshore wind turbines. Reactive compensation of the generator, power losses and control of the generator are to be studied. Configurations for power transmission to onshore point of common connection should also be considered. Costs, power losses, reliability and interface with the PMSG are to be discussed.
This paper is based on the maximum power point tracking (MPPT) strategy for Direct Drive Permanen... more This paper is based on the maximum power point tracking (MPPT) strategy for Direct Drive Permanent Magnet Synchronous Generator Wind turbine.The parts of generator is setted in d-p synchronous rotating reference frame. And the voltage space vector PWM(SVPWM) in field oriented control is adopted for generator sider converter and grid sider converter with back-to-back IGBT frequency converter.PI controller is widely used in industrial control scheme.
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Papers by brahmaiah upputuri