Yao Xingjia

Shenyang University of Technology, Feng-t’ien, Liaoning, China

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Publications (10)0 Total impact

  • Yao Xingjia, Liang Lizhe, Xing Zuoxia
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    ABSTRACT: 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 of a nonlinear observer to estimate the torque in the rotor and computes a damping torque signal that is added to the driver’s demand. The control algorithm was implemented in the existing motor control unit without any additional hardware cost. The controller was successfully tested in a test. The resonances can essentially be eliminated.
    Intelligent Computation Technology and Automation, International Conference on. 01/2009; 2:503-506.
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    ABSTRACT: 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 control strategy, to mitigate the blade root load for variable speed wind turbine. The measured blade root bending moment is taken as one of the inputs of the controller, and the three pitch demand as the controller output. The control strategy was simulated in bladed external controller based on a 3.0 MW doubly fed variable speed wind turbine model, the simulation result verified itpsilas feasible and effective. The blades root load is mitigated evidently compared to classic collective pitch control.
    Sustainable Energy Technologies, 2008. ICSET 2008. IEEE International Conference on; 12/2008
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    ABSTRACT: 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 curve in different wind speed is represented. Secondly, an optimal power curve is found. The wind turbine which works along this curve could obtain a maximum output power, achieving the goal of VSCF.
    Automation and Logistics, 2008. ICAL 2008. IEEE International Conference on; 10/2008
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    ABSTRACT: 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. Then the operation range of wind turbine was divided into several regions and the main control strategy of each region was researched. After the description of optimal tip speed ratio control in region 2, the PID control and Simplex Method PID parameters optimal were used in region 2psila torque control and region 3psila pitch control. In the end, the coordinate control strategy based on Expert Decision System of the general whole wind turbine was described and comparatively analyzed based on experiment results.
    01/2008;
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    ABSTRACT: 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, and North filter was added to avoid tower fore-aft movement. In the end, this control method was verified using simulation and prototype test.
    01/2008;
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    ABSTRACT: 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 were shown out. The experiment of synchronization and get connected to the grid were given out, and some analysis compared with synchronous generation wind system were carried out.
    Industrial Electronics and Applications, 2007. ICIEA 2007. 2nd IEEE Conference on; 06/2007
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    ABSTRACT: Pitch-regulated mechanism servo of wind turbine system is a slow time-variable nonlinear system. According to the requirement of the 1 MW wind turbine with variable speed and constant frequency, the parameters of its PID controller need to be learned or adjusted at real time. Therefore, we design this neural net PID controller based on the Hebbina supervised learning algorithm to realize the self-study and self-regulating of the wind turbine pitch control with hydraulic system. According to the practical data collected from the operation of 1 MW wind turbine, the learning speed (eta<sub>i</sub>) of Hebbina supervised learning algorithm can be fixed off-line so that the wind turbine can operate under good conditions. The paper gives the simulation results with comparison and the application of control strategy on the 1 MW wind turbine system.
    Industrial Electronics and Applications, 2007. ICIEA 2007. 2nd IEEE Conference on; 06/2007
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    ABSTRACT: 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 was verified by a 30 KW wind turbine trial platform .The trial results of control strategy were obtained on the process of synchronization and fore-and-aft getting connected to the grid. By testing and analyzing, the validity of the control method is confirmed ,which can be popularized to other similar generator system.
    Industrial Technology, 2006. ICIT 2006. IEEE International Conference on; 01/2007
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    ABSTRACT: 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 the doubly-fed VSCF wind turbine's operation characteristic in power system and influence to other load under condition of wind variation
    Electrical Machines and Systems, 2005. ICEMS 2005. Proceedings of the Eighth International Conference on; 10/2005
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