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Energy yield of passive stall regulated fixed speed wind turbine with optimal rotor speed

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Title Energy yield of passive stall regulated fixed speed wind turbine with optimal rotor speed
 
Creator VENKATESH, GC
KULKARNI, SV
 
Subject variable-speed
power
generation
machine
weibull distribution
optimum rotor speed
annual energy output (aeo)
maxima energy indicator (mei)
incomplete gamma function
 
Description This paper presents a lucid mathematical deduction of optimal rotor speed to maximize the energy yield of wind machines with passively stall regulated Fixed Speed Scheme (FSS). The power captured at a particular wind speed is dictated by the turbine characteristics in conjunction with the type of drive (variable speed or fixed speed). However, the energy yield estimation requires knowledge of wind speed frequency distribution. S Indies have revealed that the probability density function could be fairly represented by Weibull distribution with wind velocity being suitably scaled. Considering these facts, the concept of Maxima Energy Indicator (MEI) for FSS has been developed from first principles to obtain optimal rotor speed (w(opt)) numerically. Alternatively, MEI is further simplified using Incomplete Gamma Function which forms the mathematical solution for wopt. It turns out that w(opt) of FSS varies with location owing to changes in Weibull parameters. Therefore, it is deceptive to compare the energy yields of FSS with its counterpart Variable Speed Scheme (VSS) without taking into consideration the optimum rotor speed of FSS. With this motivation, computations have been performed which compare the annual yields of both the alternatives, the rotor speed of the low cost stall regulated FSS being optimized. (c) 2005
 
Publisher ELSEVIER SCIENCE SA
 
Date 2011-07-27T21:28:40Z
2011-12-26T12:58:29Z
2011-12-27T05:48:32Z
2011-07-27T21:28:40Z
2011-12-26T12:58:29Z
2011-12-27T05:48:32Z
2006
 
Type Article
 
Identifier ELECTRIC POWER SYSTEMS RESEARCH, 76(12), 1019-1026
0378-7796
http://dx.doi.org/10.1016/j.epsr.2005.12.015
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7332
http://hdl.handle.net/10054/7332
 
Language en