Abstract
The new energy research and development of the development and utilization of wind power system is the focus and hot spots of the world. DFIG (Double-fed Induction Generator) has become the main object of wind power research with its unique operating characteristics. Decoupling Control of Active Power and Reactive Power of Doubly-Fed Machines is a Key Issue in the Research and Development of Wind Power Generation Technology. In this paper, the dual-PWM converter controlled variable speed constant frequency power generation system, the use of wind energy under different wind speeds, combined with the maximum wind energy tracking, to improve the traditional controller performance[1]. The stator flux-oriented DFIG generation vector control strategy with adaptive proportional resonance (PR) is proposed. The power decoupling regulation is realized by controlling the frequency, phase and amplitude of rotor current. The modeling and simulations of the DFIG power generation operation control system are carried out by Matlab. The results verify the correctness and effectiveness of the strategy and control method.
Highlights
With the progress of science and technology, the global energy consumption continues to grow high, environmental pollution is serious, the global energy is facing a crisis
The decoupling control of active power and reactive power of DFIG is the key issue in the research and the development of wind power generation technology[2]
In order to verify that the power decoupling control of the doubly-fed machine is controlled by proportional resonance (PR).The initial reactive power of the system is 0, the wind speed of the wind turbine is 7.6m / s and the system runs in 0.5 s. 2.2.1
Summary
With the progress of science and technology, the global energy consumption continues to grow high, environmental pollution is serious, the global energy is facing a crisis. To develop a kind of clean, renewable energy sources to replace the conventional energy has a very important significance. The decoupling control of active power and reactive power of DFIG is the key issue in the research and the development of wind power generation technology[2]. Vector control technology is the core of active and reactive decoupling. Vector control system the vector control system usually needs to be vector oriented in the axis coordinate system, and through a series of calculations to become a mathematical model. By studying the mathematical model of the doublyfed machine, the vector equation in the stationary coordinate system can be obtained, vector control is carried out, and the operation relationship between current, active power and reactive power in the rotating coordinate system can be obtained[3]. The vector control system structure is complex, but the implementation is relatively easy for double-fed motor control strategy
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