Wind turbine generator protective control system under various working conditions
A technology for protection and control of wind turbines, applied in the control of wind turbines, wind power generation, wind turbines, etc., can solve the problems of reduced active power of the unit, slow return speed of the propeller, overspeed of the wind turbine, etc., to suppress the sharp rise of the power of the unit , the effect of reducing the input power
Active Publication Date: 2018-01-26
DALIAN GUOTONG ELECTRIC
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Problems solved by technology
However, the environment is often not always the same, and there are the following defects, such as (1) in the state of low voltage ride through, the active power of the unit gradually decreases, causing the speed of the unit to increase, causing overspeed
(2) During the grid voltage recover
Method used
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[0048] The judging module 31 is used to judge whether the voltage information transmitted by the motor detection board is greater than or equal to the nth preset value. The control module 32 is used to control the reference angle of the blade angle protector when the voltage detected by the motor detection board is greater than or equal to the nth preset value, and the nth preset voltage value is less than the n+1th preset voltage value, that is, n- 1
[0049] When the unit is running normally, the parameters adopt the first preset value.
[0050] When the voltage value detected by the motor detection unit 20 reaches the preset value of n>1, the control unit 30 determines that the generator set is in a high voltage state, and the c...
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The invention discloses a wind turbine generator protective control system under various working conditions. The wind turbine generator protective control system is characterized in that a control model of the control system is firstly established according to control characteristics of a wind turbine generator; a rotation speed controller which adopts a transient-state control strategy and a steady-state control strategy to operate in parallel is used for judging which rotation speed protective control method is adopted according to the specific condition of the special working condition; when a power grid is in a steady state, the rotation speed controller under the steady-state control strategy is adopted, so that a fan safely operates under rated rotation speed; when the wind turbine generator operates under a special working condition, rotation speed control under the transient-state control strategy must be automatically switched to, a phenomenon that the wind turbine generator exceeds speed as a result of a special working condition or power of the wind turbine generator sharply increases as a result of voltage fluctuation of the power grid can be restrained by quick response, and input power of the wind turbine generator is reduced to adapt to reduction of output electric energy under faults of the power grid.
Description
technical field [0001] The invention relates to the technical field of fan control, in particular to a protection and control system for wind turbines under various working conditions. Background technique [0002] At present, in the development of various renewable energy sources, the development of wind power has the most potential, the cost of power generation is gradually reduced, and the technology is becoming more and more mature, thus forming a new industry and becoming the fastest growing relative to the power system structure. New energy power generation. Therefore, the research on wind power generation technology is of great significance. [0003] The randomness and uncertainty of wind energy make the electric power, frequency, and voltage output by wind turbines change with the wind speed, so the power quality must be controlled and adjusted. However, the wind turbine system has the characteristics of strong nonlinearity, uncertainty, and multiple disturbances, ...
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Login to view more IPC IPC(8): F03D7/02F03D7/04F03D17/00
CPCY02E10/72
Inventor 马靖聪张洪阳樊文辉鹿怀骥张舒睿
Owner DALIAN GUOTONG ELECTRIC
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