Design method of shafting oscillation filter for permanent magnet direct drive wind turbine

A technology for wind turbine and filter design, applied in the direction of reducing/preventing power oscillation, harmonic reduction device, AC network to reduce harmonic/ripple, etc., can solve problems affecting the safety and reliability of the unit

Active Publication Date: 2015-08-26
北京能高普康测控技术有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The mechanical transmission system of high-power permanent magnet direct-drive wind turbines has a resonant frequency. When the external input coincides with the system resonant frequency, it may cause resonance in the mechanical link, affecting the safety and reliability of the unit.

Method used

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  • Design method of shafting oscillation filter for permanent magnet direct drive wind turbine
  • Design method of shafting oscillation filter for permanent magnet direct drive wind turbine
  • Design method of shafting oscillation filter for permanent magnet direct drive wind turbine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] In step 1, the transmission link of the permanent magnet synchronous wind turbine can be equivalent to two mass links of the wind rotor mass block and the generator rotor mass block, and the model is modeled according to the following formula:

[0018]

[0019] In the formula is the equivalent moment of inertia of the mass block of the wind rotor of the permanent magnet direct drive wind turbine;

[0020] is the rotation angle of the main shaft at the rotor end of the permanent magnet direct drive wind turbine;

[0021] is the aerodynamic torque at the connection between the rotor end and the hub of the permanent magnet direct drive wind turbine;

[0022] is the damping coefficient of the mass block of the wind rotor;

[0023] is the spindle rigidity coefficient;

[0024] is the equivalent moment of inertia of the generator rotor mass block of the permanent magnet direct drive wind turbine;

[0025] is the rotation angle of the main shaft at the gene...

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Abstract

The invention discloses a designing method of a shafting vibration filter of a permanent magnetic direct drive type wind turbine generator system. The shafting vibration filter has the characteristics of a band elimination filter. The designing method is realized by means of the calculation of resonant frequency of a transmission system of the permanent magnetic direct drive type wind turbine generator system. According to the designing method of the shafting vibration filter of the permanent magnetic direct drive type wind turbine generator system, due to the fact that the shafting vibration filter is connected to the output part of a moment controller in series, resonance frequency domain components of the transmission system in the electromagnetic moment of an electric generator of the wind turbine generator system are effectively eliminated, and then the loading level of the transmission system and vibration fluctuation of output power of the electric generator are reduced, reliability of operation of the wind turbine generator system is improved, and the problem that resonance of the transmission system can be caused by a specific frequency domain component in main control moment control signals of the permanent magnetic direct drive type wind turbine generator system is solved.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and relates to a design method for a shaft system oscillation filter of a permanent magnet direct drive wind power generating set. Background technique [0002] Wind energy is currently the most economically valuable renewable energy source. According to the "China Wind Power Development Roadmap 2050" issued by the Energy Research Institute of the National Development and Reform Commission, China's wind power development goals for the next 40 years: by 2020, 2030 and 2050, wind power installed capacity The capacity will reach 200 million, 400 million and 1 billion kilowatts respectively, and by 2050, wind power will meet 17% of domestic electricity demand. [0003] At present, wind turbines have become the main equipment for wind energy utilization, and permanent magnet direct drive wind turbines are a mainstream type of wind turbines. [0004] The permanent magnet direct drive win...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24H02J3/01
CPCY02E40/40
Inventor 贾利民刘展雷涛
Owner 北京能高普康测控技术有限公司
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