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Title: GeneratorSE: A Sizing Tool for Variable-Speed Wind Turbine Generators

Abstract

This report documents a set of analytical models employed by the optimization algorithms within the GeneratorSE framework. The initial values and boundary conditions employed for the generation of the various designs and initial estimates for basic design dimensions, masses, and efficiency for the four different models of generators are presented and compared with empirical data collected from previous studies and some existing commercial turbines. These models include designs applicable for variable-speed, high-torque application featuring direct-drive synchronous generators and low-torque application featuring induction generators. In all of the four models presented, the main focus of optimization is electromagnetic design with the exception of permanent-magnet and wire-wound synchronous generators, wherein the structural design is also optimized. Thermal design is accommodated in GeneratorSE as a secondary attribute by limiting the winding current densities to acceptable limits. A preliminary validation of electromagnetic design was carried out by comparing the optimized magnetic loading against those predicted by numerical simulation in FEMM4.2, a finite-element software for analyzing electromagnetic and thermal physics problems for electrical machines. For direct-drive synchronous generators, the analytical models for the structural design are validated by static structural analysis in ANSYS.

Authors:
 [1];  [1]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)
OSTI Identifier:
1395455
Report Number(s):
NREL/TP-5000-66462
DOE Contract Number:
AC36-08GO28308
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; permanent magnet generator; electrically excited synchronous generator; squirrel cage; doubly-fed induction; mass; cost; efficiency

Citation Formats

Sethuraman, Latha, and Dykes, Katherine L. GeneratorSE: A Sizing Tool for Variable-Speed Wind Turbine Generators. United States: N. p., 2017. Web. doi:10.2172/1395455.
Sethuraman, Latha, & Dykes, Katherine L. GeneratorSE: A Sizing Tool for Variable-Speed Wind Turbine Generators. United States. doi:10.2172/1395455.
Sethuraman, Latha, and Dykes, Katherine L. Fri . "GeneratorSE: A Sizing Tool for Variable-Speed Wind Turbine Generators". United States. doi:10.2172/1395455. https://www.osti.gov/servlets/purl/1395455.
@article{osti_1395455,
title = {GeneratorSE: A Sizing Tool for Variable-Speed Wind Turbine Generators},
author = {Sethuraman, Latha and Dykes, Katherine L},
abstractNote = {This report documents a set of analytical models employed by the optimization algorithms within the GeneratorSE framework. The initial values and boundary conditions employed for the generation of the various designs and initial estimates for basic design dimensions, masses, and efficiency for the four different models of generators are presented and compared with empirical data collected from previous studies and some existing commercial turbines. These models include designs applicable for variable-speed, high-torque application featuring direct-drive synchronous generators and low-torque application featuring induction generators. In all of the four models presented, the main focus of optimization is electromagnetic design with the exception of permanent-magnet and wire-wound synchronous generators, wherein the structural design is also optimized. Thermal design is accommodated in GeneratorSE as a secondary attribute by limiting the winding current densities to acceptable limits. A preliminary validation of electromagnetic design was carried out by comparing the optimized magnetic loading against those predicted by numerical simulation in FEMM4.2, a finite-element software for analyzing electromagnetic and thermal physics problems for electrical machines. For direct-drive synchronous generators, the analytical models for the structural design are validated by static structural analysis in ANSYS.},
doi = {10.2172/1395455},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Sep 22 00:00:00 EDT 2017},
month = {Fri Sep 22 00:00:00 EDT 2017}
}

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