Adjustable concentric towers to vary tower shadow effect on flicker in wind turbine
01 Aug 2017-
TL;DR: In this article, the authors developed a facility to find the impact of tower shadow effect on voltage flicker initiated in the wind turbine output, where a tubular tower is formed using pipes.
Abstract: In this paper the facility to find the impact of tower shadow effect on voltage flicker initiated in the wind turbine output is developed. Concentric towers are developed using steel any suitable material pipe. The length of the pipe can be adjusted using sliding the pipe. Nut and bolts are used to fix the length of the pipe. There is a provision to fix the turbine on the tower. Tubular tower are formed using pipes. Pipes with different diameters are provided in the test set up. As length and height of the towers is varied the tower shadow effect is also varied. Artificial wind is created using blower fans. The impact of tower shadow effect on the voltage flicker output of the wind turbine is observed on digital storage oscilloscope. There is a provision to fix various types of generators on the towers. The experiment is conducted on the wind turbine scaled down models. The result can be scaled to the actual dimensions of the wind tower.
Citations
More filters
References
More filters
06 Mar 2014
TL;DR: In this article, the impact of river bank environment on vertical wind shear and subsequently on flicker in wind turbine which is sited on that surface was revealed in a laboratory wind tunnel with artificial surfaces created in a wind tunnel.
Abstract: The paper reveals niceties of impact of river bank environment on vertical wind shear and subsequently on flicker in wind turbine which is sited on that surface. This is accomplished in a laboratory wind tunnel with artificial surfaces created in a wind tunnel. The various surfaces imitated in the wind tunnel are river sand, various sizes of pebbles of river bank, flowing water of river at high speed, flowing water of river at low speed etc. Wind turbine is tested for these sundry kinds of surface roughness. Here emphasis is given on establishment of empirical model of flicker initiated owing to vertical wind shear instigated because of sundry surface roughness of river bank topography. Values of flicker with projected empirical model and flicker from wind tunnel test are closer.
27 citations
12 Mar 2014
TL;DR: In this paper flicker is computed with linear approach considering impact of vertical wind shear, turbine blade length and tower height and mathematical model to compute the flickers is developed using these parameters.
Abstract: Use of wind energy is increased day by day. Power quality is one of the prime issues. Computation of flicker is very necessary to improve the quality of wind power generation. In this paper flicker is computed with linear approach. Vertical wind shear has major impact on the production of the flicker in wind generation. Computation of flicker in this paper is carried out considering impact of vertical wind shear. Other parameters considered for computation of flicker are turbine blade length and tower height. Mathematical model to compute the flicker is developed using these parameters. Validation of the model is also done.
27 citations
26 Aug 2010
TL;DR: In this article, a static straight blade used for the straight-bladed vertical axis wind turbine by using a simple icing wind tunnel was observed and recorded under different wind speeds and flow discharges of a water spray nozzle.
Abstract: Icing on blade surface of the wind turbine set in cold regions is a serious problem. To invest the mechanism of icing and ice accretion on blade surface, wind tunnel tests were carried out on a static straight blade used for the straight-bladed vertical axis wind turbine by using a simple icing wind tunnel. The icing and ice accretions on blade surface at some typical attack angles were observed and recorded under different wind speeds and flow discharges of a water spray nozzle set in the wind tunnel outlet. The maximum icing thickness on the leading edge and trailing edge of blade surface were also measured and compared. Based on the test results, the factors affecting the icing and ice accretion on the static straight blade surface for wind turbine were discussed.
25 citations
24 Mar 2014
TL;DR: In this paper, a newfangled empirical model was proposed to figure, flicker, instigated in the horizontal axis, upwind turbine, due to vertical wind shear, in continuous operation.
Abstract: Paper confers a newfangled empirical model to figure, flicker, instigated in the horizontal axis, upwind turbine, due to vertical wind shear, in continuous operation. Postulations, boundary curbs and limitations of the model are also depicted. In the proposed model, vertical wind shear, number of blades, blade length and tower height are echoed. The elegance of the model is that, it is expedient to range of heights of buildings on which the turbine is sited. Substantiation of model is carried out with comparative graphs revealed after fervent experimentation on a turbine in a tunnel with various heights of models of buildings.
23 citations
16 Dec 2008
TL;DR: In this paper, the impact of tower shadow effect on the power output of a fixed-speed wind farm was investigated. But the authors focused on the effect of the tower shadow on power fluctuation and did not consider the effects of the synchronisation of turbine blades around the tower.
Abstract: This paper studies the impact of tower shadow effect on the power output of a fixed-speed wind farm. A data acquisition unit was placed at a wind farm in Northern Ireland which consists of ten fixed-speed wind turbines. The recording equipment logged the wind farmpsilas electrical data, which was time stamped using the global positioning network. Video footage of the wind farm was recorded and from it the blade angle of each turbine was determined with respect to time. Using the blade angle data and the wind farmpsilas power output, studies where performed to ascertain the extent of tower shadow effect on power fluctuation. This paper presents evidence that suggests that tower shadow effect has a significant impact on power fluctuation and that this effect is increased due to the synchronising of turbine blades around the tower region.
20 citations
"Adjustable concentric towers to var..." refers background in this paper
...D McSwiggan [13] studied the performance of the wind turbines with fixed speed....
[...]
...[13] He claimed that tower shadow effect has major impact on fluctuations in the power output....
[...]