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A DSP Based Experimental System for Wind Turbine

Author: FanMingMing
Tutor: LouYunJiang；LiaoWenJian
School: Harbin Institute of Technology
Course: Control Science and Engineering
Keywords: Wind Turbine DFIG Inverter VVVF Vector control
CLC: TK83
Type: Master's thesis
Year: 2010
Downloads: 138
Quote: 0
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Abstract


Mankind enters the 21st century, the rapid industrial development makes energy more and more problems in the next few decades, a number of conventional energy will be depleted. Therefore, renewable energy such as wind power has become a major research topic at the present stage. With the increase of the fan unit capacity of wind power in some experimental research process can not be done in the field of wind power research laboratory simulations become an important way. This paper stresses around the high-power wind turbine test rig and its control technology conduct research. The issue stems from wind turbine power converter bench project. It uses a set of motors for drag experimental system by simulating a variety of wind conditions, to study and improve the converter's operating characteristics, and for subsequent active power, reactive power control and low voltage ride through experiments to create a platform. In this paper, experimental stations and networks on the trailer side converter and the machine side converter as research content, and a focus on machine side converter, we propose a model based on wind speed, wind turbine with asynchronous motor static simulation method . First, the theoretical analysis and experimental verification, indicating the open-loop speed control VVVF control characteristics and the control effect; on this basis, according to the dynamic model of asynchronous motor, the motor within the analysis of the relationship between current and flux, the proposed induction motor by rotor flux oriented vector control programs, and the use of MATLAB / SIMULINK right by the rotor flux oriented vector control technology simulation, while ensuring a high dynamic characteristics of the premise, basically eliminating the rotor speed control system parameters control characteristics. Finally, two control schemes were analyzed. In this paper, some major aspects of the experimental system for certain research: In the VVVF control scheme, since the voltage and frequency is not strictly proportional relationship expressed as S-shaped curve in the low frequency voltage needed some compensation for this article determined by theoretical and experimental low-frequency compensation voltage; vector control programs in order to achieve the rotor flux orientation of the VC system, the key factor is the rotor flux obtained for the flux feedback signal and divide link utilization, and direct detection methods such as flux tank buried in the motor coil and so have a lot of technology and technical problems, making detection signal contains a large ripple component, the more the speed, the more serious, so this calculation using the indirect approach to obtain rotor flux amplitude and phase.

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CLC: > Industrial Technology > Energy and Power Engineering > Wind energy, wind machine > Wind machinery and equipment
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