Wind Power and Wind Turbines
Pressure
Wind – what causes it?, cont.
Pressure differences cause the flow of fluids (gases and liquids)
pressure is always measured relative to some reference pressure
Sometimes relative to vacuum  absolute
Sometimes relative to atmospheric pressure
Prevailing Winds
Wind – what causes it?, cont.
Weather Processor Symbols
WXP Legend
Review Question 1
What causes wind?
Air pressure
Weight of the atmosphere
Pressure difference in atmosphere
Low pressure
High p ....etc

[:=Read Full Message Here=:]

....etc

[:=Read Full Message Here=:]

Multimedia Clip Generation from Documents for Browsing on Mobile Devices – IEEE TRANSACTIONS ON MULTIMEDIA, VOL. 10, NO. 5,

java and j2me


Abstract—

Small displays on mobile handheld devices, such as personal digital assistants (PDAs) and cellular phones, are the bottlenecks for usability of most content browsing applications. Generally, conventional content such as documents and web pages need to be modified for effective presentation on mobile devices.
This paper proposes a novel visualization for documents, called Mult ....etc

[:=Read Full Message Here=:]

A large interest in renewable energy systems has been developed to mitigate the green house effect. In Western Europe, the focus is thus, on wind power and especially on offshore locations, due to higher energy production, a longer expected life time and lack of suitable wind turbine sites on land. A DC cable is the preferred choice when connecting large offshore wind farms to the grid. The utilization of the Dc cables was enabled by the new HVDC transmission technology using voltage sourced converters. The offshore windfarms that are being bui ....etc

[:=Read Full Message Here=:]

A variable-speed controller, for an existing 225 kW fixed-speed wind power generator, is presented in this paper. A sensorless direct torque control algorithm-based controller is proposed for the squirrel-cage induction generator. Generator torque reference is derived based on sensorless maximum power tracking mode algorithm, up to the base speed of the generator. A three-phase front-end converter is used here to deliver the generated power to the grid with unity-power-factor operation at all wind speeds. This algorithm is based on direct activ ....etc

[:=Read Full Message Here=:]

Plzz send me a seminar report and PPT of the topic over view of Multi Mega Watt wind turbine and wind Parks. ....etc

[:=Read Full Message Here=:]

A NEW INTERCONNECTING METHOD FOR WIND TURBINE/GENERATOR IN A WIND FARM
Presented by:
Aswin Das
EEE
College Of Engineering, Trivandrum



CONTENTS
Objectives
Introduction
Selection of site
New method
How system works
Basic equations
Measures against halt
Operating methods
Control strategies
Basic characteristics


OBJECTIVES
A new interconnecting method for wind turbine/generator is proposed.
Through this method electrical energy of ....etc

[:=Read Full Message Here=:]

ENHANCED PERFORMANCE OF A DOUBLY FED
WIND-POWER INDUCTION GENERATOR AT WIND-
RANGE BOUNDARIES
ABSTRACT
The doubly fed induction generator (DFIG) is one of the largest generators used
with MW-class wind turbines. This paper focuses on the weak performance areas
of grid-connected DFIG-based wind turbines. Basically, the DFIG performance at
low wind speeds, close to the cut in speed, and around the full rating operation (in
the vicinity of rated wind speed) is investigated. For low wind speed region, the
c ....etc

[:=Read Full Message Here=:]

Hi im niyas i would like to get details on over view of multimegawatt wind turbines and wind parks pdf ....etc

[:=Read Full Message Here=:]

In nature, it is solar power that creates wind power. Consider the example of the sea breeze. The sun heats both land and sea, but the land heats up more quickly and reaches a higher temperature than the sea. The air over the land becomes hotter than the air over the sea and the hot air rises, creating an area of lower air pressure (close to the surface). Air moves from the area of higher pressure over the sea to the area of lower pressure over the land. The cool sea air heats up as it moves over the land and so it rises, creating a cycle. The ....etc

[:=Read Full Message Here=:]