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NORpie 2002 - Topic 04: GENERATION SYSTEMS
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > NORpie - Proceedings > NORpie 2002 > NORpie 2002 - Topic 04: GENERATION SYSTEMS
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	A Comparative Study of Steady-State Characteristics of Brushless Doubly-Fed Induction Generation Systems   By K. Oguchi; S. Kato; N. Hoshi; T. Kubota	[View]   [Download]
Abstract: The steady-state characteristics of a novel brushless doubly-fed induction generator system proposed by the present authors are discussed in comparison with those of two conventional systems: (a) a doubly-fed induction generator equiped with brushes and slip-rings, and (b) a brushless doubly-fed induction generator without using a harmonic current reducing means. The simulation results show that the proposed generation system can provide a reasonably good efficiency and less-distorted input-currents, but it has a poor input-power factor. Therefore, it can be put into practical use when its input power factor is improved by suitable means such as a line-side PWM inverter or static capacitors.
	Drive with Permanent Magnet Synchronous Machine and Voltage Source Inverter for Wind Power Application   By S. Hünemörder; M. Bierhoff; F. W. Fuchs	[View]   [Download]
Abstract: A drive with permanent magnet synchronous machine and voltage source inverter for wind power application has been modeled and a 15 kW test sample has been built up in the laboratory. The behavior of the wind turbine has been emulated and a maximum power control is added. The drive performance has been analyzed by means of simulation and measurements. Main subjects of the analysis are the control performance and the dynamic power flow of the drive when driven by the wind turbine.
	Design and Implementation of a Digitally Controlled Stand-Alone Photovoltaic Power Supply   By F. M. Ishengoma; L. E. Norum	[View]   [Download]
Abstract: An implementation of a digitally controlled stand-alone PV power supply consisting of PV array, battery and inverter is presented. Peak power tracking using Incremental conductance algorithm and four state battery charging with temperature compensation are described. Some simulation results are presented.
	Energy Efficiency Comparison of Electrical Systems for Wind Turbines   By A. Petersson; S. Lundberg	[View]   [Download]
Abstract: The efficiency of the electrical system of doubly-fed induction generators, for variable speed wind turbines, in comparison to other electrical systems has been investigated. It has been found that there is a possibility to gain a few percent in energy efficiency using a doubly-fed induction generator compared to an ordinary induction generator equipped with a full-power inverter.
	A Case Study Regarding Influence of Solvers in Matlab/Simulink for Induction Machine Model in Wind Turbine Simulations   By F. Iov; F. Blaabjerg; Z. Chen; A. D. Hansen; P. E. Sörensen	[View]   [Download]
Abstract: In the last years Matlab / Simulink (R) has become the most used software for modeling and simulation of dynamic systems. Wind energy conversion systems are for example such systems because they contain parts with different range for the time constant: wind, turbine, generator, power electronics, transformer and grid. These subsystems are described by differential equations with different simulation steps. The electrical generator and the power converter need the smallest simulation step and therefore, these blocks decide the simulation speed. This paper present important aspects regarding the different implementations of induction machine model, influence of the solvers from Simulink and how the simulation speed can be increase for a wind turbine.