In this work, a second-order sliding mode control algorithm is proposed for variable speed laboratory size DC generator wind turbine experiment system in order to track a speed profile and operate the wind turbine at maximum power extraction. The turbine torque, which varies with the wind speed, is considered as an unknown disturbance and rejected by the sliding mode strategy. The sliding mode ...

This paper presents the results of simulations of the complete three-dimensional fluid flow through the Spiral Casing, Stay Vane, Guide Vane, and then through the Francis turbine runner of the Derbendikan power station. To investigate the flow in the Francis turbine and also to identify the loads acting on the turbine blades, a three-dimensional model was prepared according to specifications pr...

Wind energy is a rapidly growing form of renewable energy in the United States. While summary information on the total amounts of installed capacity are available by state, a free, centralized, national, turbine-level, geospatial dataset useful for scientific research, land and resource management, and other uses did not exist. Available in multiple formats and in a web application, these publi...

Increasing Production of Integrated-Vegetable and Fish in the Biofloc-Aquaponic System Tanjung Johor Village, Jambi City. is a fish-producing center However, biofloc pond Sekintang Dayo Farmers Group was minimally managed, so fish yield farmer's income low. The technology that potential to be applied biofloc-aquaponics. Biofloc-aquaponics agriculture which integrated vegetable cultivation. This...

flow in the first two-stage of v 94.2 gas turbine is simulated numerically. in this turbine, the second stator is clocked relative to the first stator to different positions. steady-state analysis was carried out by varying the circumferential relative position of the consecutive stator vanes to study the effects of the clocking on turbine performance. a density based compressible inviscid flow...

determination of the starter torque-speed diagram is a major task in the design or selection of a proper gas turbine starter. in this paper, the maximum power of the mgt-40 gas turbine starter was calculated based on the dynamics of the rotor, start-up logic, and compressor map. in a recent research, the pressure ratio was assumed as a linear function of the rotor speed and the required starter...

This paper is based on a recent paper presented in the 2007 IEEE SMC conference by the same authors [1], discussing an approach to predicting energy output from an instream tidal turbine farm. An in-stream tidal turbine is a device for harnessing energy from tidal currents in channels, and functions in a manner similar to a wind turbine. A group of such turbines distributed in a site is called ...

A new composite turbine control architecture that consists of feedforward and feedback parts based on the upwind speed measurements and wind speed measurements at the turbine site, respectively, is described. The algorithm starts with preprocessing of a low-rate sampled upwind speed via the spline interpolation method. A run-ahead model driven by the signals from a preprocessing block models th...

Wind energy is considered a clean source and predicted to be one of the primary sources electricity. However, leading-edge erosion wind turbine blades due impacts from rain drops, solid particles, hailstones, bird fouling, ice, etc., major concern for sector that reduces annual production. Therefore, protection has been an important topic research development in last 20 years. Further, there ar...

Article history: Received 19 February 2005 Received in revised form 7 March 2006 Accepted 15 March 2006 Machine learning techniques for ecological applications or “eco-informatics” are becoming increasingly useful and accessible as software for these techniques becomes more readily available. Complex ecological data sets with a multitude of variables are also increasingly available. Ecologists,...