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Wind turbine power performance is an important process of type approval testing project. Because the period of power performance testing is long and it is difficult to collect complete data in a short time, the wind turbine power performance test methods based on least squares prediction is proposed. Firstly, this paper introduces the testing process, site calibration, uncertainty assessment and common...
During a grid voltage drop ,a problem is resonances in the drive-train shaft between the wind turbine and induction generator. Disadvantageous effects caused by this are noticeable vibrations and high mechanical stresses due to torque oscillations. The oscillations can be damped using The Drive Train Damper, which is used to mitigate fatigue loading of drive train components, controller consisting...
Dynamic load is a key consideration in large scale wind turbine design. It is approved that the performance of controller can distinguish impact wind turbine loads. During pitch control algorithm design, if load influence is considered, it will be benefit to lower cost of whole wind turbine and extend longevity. In this paper, an individual pitch controller is developed based on a kind of model free...
In this thesis, the torque control, pitch control and general wind turbine coordinate control strategy of variable-speed adjustable-pitch wind turbine were researched. The control object is local SUT-1500 wind turbine based on independent design. First, the control object was modeled by the modal linearization process using Bladed software, among which the mechanical dynamic response was considered...
For the purpose of achieving VSCF control system, this paper, stemming from the aerodynamics basic theory, analyzing the principle of pursuiting most wind energy. Through constructing the wind turbine stress model. Theory Wind energy utilization modulus is inferred in this paper. The paper focuses on VSCF control theory and operation mode. Firstly, the analysis of the relationship diagram of power...
For the variable speed operation of large scale wind turbine, the vibrations become key problem that can not be ignored. In this paper, the active vibration control based on expert PID pitch control strategy was researched. Firstly, the vibration cause and excitation resource of large variable speed pitch regulated wind turbine were analyzed. Then, the Expert PID pitch control configuration was described,...
The model of the whole doubly fed variable speed regulated pitch wind generation system was founded to do power output performance simulation. The method of sensorless direct torque control (DTC) and model referencing adaptive system (MRAS) method were used in power regulation control. The results of simulation on variable speed power control performance based on 1.5MW SUT-1500 wind turbine prototype...
A nonlinear control method based on model linearization is established and a fuzzy controller is designed for the variable speed variable pitch wind turbines in this paper. The simulation results show that control performances have been improved, and the wind turbines controller is effective.
To solve the connection to the grid and power control problems of doubly-fed variable speed constant frequency (VSCF) wind turbine control system , the method of rotor magnetic flux direct torque control (DTC) was used to regulate rotor side AC exciting ,and get the aim of controlling stator side output. The control principle was described, the trial control scheme was established, and the performance...
This paper models the doubly-fed variable speed constant frequency (VSCF) wind power transmission system, including the wind variation, wind wheel dynamic, mechanical swing, drive train, generator dynamic, power system etc. Based on the FD61-1000 prototype doubly-fed generator wind power system design parameters, by using MATLAB Simulink tools to simulate the whole system, this paper finally reveals...
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