Double-fed wind power generation system based on vector power system stabilizer

A technology for doubly-fed wind power generation and power system stability, applied in vector control systems, motor generator control, control systems, etc., can solve problems such as incomplete damping

Active Publication Date: 2014-12-24
STATE GRID CORP OF CHINA +3
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Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to provide a doubly-fed wind power generation system based on a vector power system stabilizer, aiming at solving the probl...

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  • Double-fed wind power generation system based on vector power system stabilizer
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  • Double-fed wind power generation system based on vector power system stabilizer

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] The embodiment of the present invention analyzes the key factors affecting the output active power of the double-fed wind power generation system, and uses the terminal voltage vector of the wind turbine as the input signal of the power system stabilizer, so that the vector power system stabilizer can more comprehensively damp the electromechanical time of the system Scale power oscillations.

[0021] The terminal voltage of double-fed wind turbines is affected by the external power grid. When the external power grid is disturbed, the amplitude and phase angle of the wind turbine terminal v...

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Abstract

The invention discloses a double-fed wind power generation system based on a vector power system stabilizer. The double-fed wind power generation system comprises a wind turbine, a gear case, a power generator, a rotor-side converter, a grid-side converter, a direct current capacitor, a filter, a rotor-side controller, a vector signal collecting device and the vector power system stabilizer. The input end of the vector signal collecting device is connected with a power grid; the input end of the vector power system stabilizer is connected with the output end of the vector signal collecting device; the first input end of the rotor-side controller is connected to the input end of the power generator, the second input end of the rotor-side controller is connected to the power grid, the third input end of the rotor-side controller is connected to the output end of the vector power system stabilizer, and the output end of the rotor-side controller is connected to the control end of the rotor-side converter. According to the double-fed wind power generation system, wind turbine terminal voltage vector signals are introduced to serve as input signals for obtaining electromagnetic torque control compensation signals and terminal voltage control compensation signals, the terminal voltage amplitude and the terminal voltage phase angle are completely considered, terminal voltage vectors serve as input signals of the vector power system stabilizer, and disturbance of the electromechanical time scale of the power grid is comprehensively reflected.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and more specifically relates to a doubly-fed wind power generation system based on a vector power system stabilizer. Background technique [0002] As the installed capacity of wind power increases in the power system, the share of traditional power sources such as synchronous generators is getting smaller and smaller. The synchronous generator has a certain effect on the small disturbance stability of the power system; when the grid power oscillates, the rotor speed of the synchronous generator will change, and then the kinetic energy of the rotor of the synchronous machine will be changed to bear part of the system oscillation power. However, due to the existence of the voltage regulator, when the long line is powered and the load is heavy, if the rotor angle oscillates, the phase of the additional flux linkage provided by the voltage regulator lags behind the oscillation of the a...

Claims

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Application Information

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IPC IPC(8): H02P9/10H02P21/14
Inventor 袁小明胡家兵谢媛媛黄云辉李文锋李莹韩志勇陶向宇
Owner STATE GRID CORP OF CHINA
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