A detailed model of wind power station, including Double Fed Induction Generator, DFIG is presented in this paper. Two control mechanisms are included in the model. The inner control system uses stator flux oriented control for the rotor side converter and grid voltage vector control for the grid side converter. The outer control system is used for wind turbine pitch angle. PSCAD/EMTDC is us...

Research on wind turbine technologies have focused primarily on power cost reduction. Generally, this aim has been achieved by increasing power output while maintaining the structural load at a reasonable level. However, disturbances, such as wind speed, affect the performance of wind turbines, and as a result, the use of various types of controller becomes crucial.This paper deals with two ada...

The present work includes a study of the impact varying pitch angles and angular velocity on performance parameters horizontal axis wind turbine using computational fluid dynamics. Simulations have been made commercial Ansys 15 software. Seven are chosen for study, i.e., 0° , 5 ° 10° 15° 20° 25° 28°, two values 1.57 rad/sec 2.22 used simulation. turbulence model is shear stress transport (SST) ...

Aerodynamic, load, flow-visualization, and inflow measurements have been made on a 10-m, three-bladed, downwind, horizontal-axis wind turbine ( HAWT). A video camera mounted on the rotor was used to record night­ time and daytime video images of tufts attached to the low-pressure side of a constant-chord, zero-twist blade. Load measurements were made using strain gages mounted at every 10% of t...

Abstract: In modern wind farms, maximum power point tracking (MPPT) is widely implemented. Using the MPPT method, each individual wind turbine is controlled by its pitch angle and tip speed ratio to generate the maximum active power. In a wind farm, the upstream wind turbine may cause power loss to its downstream wind turbines due to the wake effect. According to the wake model, downstream powe...

Wind is arguably the most promising source of sustainable energy. Moreover, recent developments in wind turbine technology have achieved significant cost reductions in extracting energy from wind. The main reason for this has been the application of innovative and effective control strategies. Over time, turbine designs have focused on reducing the overall cost of energy by either maximizing en...

This paper describes the modeling of the various components in a pitch controlled wind energy system and the design of the pitch controller, and discusses the response of the pitch-controlled system to wind velocity variations. The investigated pitch control system was observed to have a large output power variation and settling time. The pitch function provides full control over the mechanical...

The current study uses large eddy simulations to investigate the transient response of a utility-scale wind turbine wake dynamic changes in atmospheric and operational conditions, as observed previous field-scale measurements. Most investigations assume quasi-steady but real turbines operate highly stochastic atmosphere, their operation (e.g., blade pitch, yaw angle) constantly response. Furthe...

With the wind turbines being produced toward to large scale and light weight, the flexibility of blade, drive mechanism and tower increase apparently. Loads suffered by wind turbines during operation become increasingly intricate. Some control approaches could be used to cut down these loads in orde to expand life cycle of generating sets. Aiming at the full load operation zone above rated wind...

a detailed model of wind power station, including double fed induction generator, dfig is presented in this paper. two control mechanisms are included in the model. the inner control system uses stator flux oriented control for the rotor side converter and grid voltage vector control for the grid side converter. the outer control system is used for wind turbine pitch angle. pscad/emtdc is used ...