Showing 111 - 120 of 144
In this paper a set-membership approach for fault detection of a benchmark wind turbine is proposed. The benchmark represents relevant fault scenarios in the control system, including sensor, actuator and system faults. In addition we also consider parameter uncertainties and uncertainties on...
Persistent link: https://www.econbiz.de/10010676099
How tangible are the costs of natural gas compared to the benefits of one of the fastest growing sources of electricity – wind energy – in the United States? To answer this question, this article calculates the benefits of wind energy derived from two locations: the 580MW wind farm at...
Persistent link: https://www.econbiz.de/10010603225
On a $/kW basis, wind turbine prices in the U.S. have declined by nearly one-third on average since 2008, after having previously doubled over the period from 2002 through 2008. These two substantial and opposing trends over the past decade – and particularly the earlier price doubling – run...
Persistent link: https://www.econbiz.de/10010576752
Wind energy is the most promising of the new renewable sources of energy. By the end of 1998, the global installed capacity of modern grid connected wind turbines was some 10,000 MW, and the growth rates of installations worldwide are 30%-40% annually. The cost of wind energy was reduced by 30%...
Persistent link: https://www.econbiz.de/10010816880
Distributed Generation (DG) units are said to have the potential to become an integral part of the future power systems. Today, DG units are characterised by high specific investment costs, but nevertheless are politically promoted because of their high degree of energy efficiency and their...
Persistent link: https://www.econbiz.de/10010816905
We study the impact of environmental regulations on the patent activities for wind turbines between 1980 and 2008. We explicitly control for energy market liberalisation and take a potential interaction between liberalisation and policy instruments into account. We find a strong and highly...
Persistent link: https://www.econbiz.de/10009002692
This paper describes the analysis of near-surface wind speeds in Western Oklahoma. The goals of this research are to characterise the nocturnal low-level jet (LLJ) in the region, and to assess the impact wind variability, vertical shear and the LLJ on wind energy calculations. Results show the...
Persistent link: https://www.econbiz.de/10008755326
This paper analyses the effect wind turbulence on the output of large-sized wind turbines. A brief account of atmospheric stability and vertical temperature gradient is explained. The principal objective of this paper is to give an account of underlying principles and concepts without going into...
Persistent link: https://www.econbiz.de/10011044251
Wind Turbines (WT) are one of the fastest growing sources of power production in the world today and there is a constant need to reduce the costs of operating and maintaining them. Condition monitoring (CM) is a tool commonly employed for the early detection of faults/failures so as to minimise...
Persistent link: https://www.econbiz.de/10011044303
A genetic algorithm approach is employed to obtain optimal placement of wind turbines for maximum production capacity while limiting the number of turbines installed and the acreage of land occupied by each wind farm. Specifically, three cases are considered—(a) unidirectional uniform wind,...
Persistent link: https://www.econbiz.de/10011044574