Wind turbine generator pitch system backup power source charging circuit and control method thereof

A backup power supply and pitch control system technology, applied in battery circuit devices, power network operating system integration, wind power generation, etc., can solve the problems of high charging failure probability and long charging time, shorten charging time, improve charging efficiency, The effect of avoiding the loss of power generation due to downtime

Pending Publication Date: 2021-11-02
东方电气风电股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies of the prior art, the present invention provides a charging circuit for the backup power supply of the wind turbine pitch system and its control method, which solves the problems of long charging time and high probability of charging failure in the prior art.

Method used

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  • Wind turbine generator pitch system backup power source charging circuit and control method thereof
  • Wind turbine generator pitch system backup power source charging circuit and control method thereof
  • Wind turbine generator pitch system backup power source charging circuit and control method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Such as Figure 1 to Figure 3 As shown, a backup power supply charging circuit for a wind turbine pitch system includes a charger power supply, a backup power supply, n chargers, and n control modules, and the charger power supply, each charger, and the backup power supply are electrically connected in turn to form a branch Each charger is electrically connected to a control module, and n control modules are interconnected; wherein, n is a positive integer and n≥2.

[0049] The n charging branches of the present invention jointly charge the backup power supply; when the capacity of the backup power supply of the pitch control system is greatly increased, the charging time is shortened, so that the pitch control system can quickly enter the ready state; at the same time, safety redundancy is realized, and when there is a charger failure In other cases, the other charger can still charge the backup power supply, and the pitch system can continue to operate, avoiding the l...

Embodiment 2

[0059] Such as Figure 1 to Figure 3 As shown, as a further optimization of Embodiment 1, this embodiment provides the control method for the backup power charging circuit of the wind turbine pitch system:

[0060] A control method for a backup power supply charging circuit of a wind turbine pitch system. When a main charger is in a fault state, a master control module and a slave control module are switched to each other, and the master charger and the slave charger are switched to each other.

[0061] When the main charger is in a failure state, the main and slave charging circuits switch to each other to achieve safety redundancy. When the main charger fails, the slave charger can still charge the backup power supply, and the pitch system can continue to operate, avoiding the loss of power generation due to unit shutdown increase the reliability of the dual-drive pitch system and even wind turbines.

[0062] As a preferred technical solution, when the main charger and the ...

Embodiment 3

[0075] Such as Figure 1 to Figure 3 As shown, as a further optimization of Embodiment 1 and Embodiment 2, this embodiment provides a more detailed implementation manner.

[0076] The invention discloses a backup power supply charging circuit and a control method of a wind turbine pitch system, such as figure 1 As shown, the charging circuit includes at least two charging loops, master / slave. The main charging loop is connected in sequence by the charger power supply, the main charger, the main diode, and the supercapacitor module. The slave charging loop is connected by the charger power supply, the slave charger, The slave diodes and supercapacitor modules are connected sequentially; at the same time, the voltage value of the supercapacitor module is measured in real time by the voltage measurement module and sent to the main control module and the slave control module respectively through analog signals. The voltage of the supercapacitor module and the status of the charge...

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Abstract

The invention discloses a wind turbine generator pitch system backup power source charging circuit and a control method thereof. The charging circuit comprises a charger power source, a backup power source, n chargers and n control modules, the charger power source, wherein each charger and the backup power source are electrically connected in sequence to form a branch circuit, each charger is electrically connected with one control module, the n control modules are interconnected, and n is a positive integer and is greater than or equal to 2. The problems of long charging time, high charging fault probability and the like in the prior art are solved.

Description

technical field [0001] The invention relates to the technical field of pitch control for wind power generation, in particular to a charging circuit for a backup power supply of a pitch system of a wind turbine and a control method thereof. Background technique [0002] The pitch control system is one of the core control systems of the wind turbine. It has functions such as adjusting the input power of the wind rotor and pneumatic braking, which directly affects the performance and safety of the wind turbine. When the grid power supply is normal, the pitch control system takes power from the grid to adjust the pitch; when the grid is powered off, the pitch control system takes power from the backup power supply to drive the blades back to the storm position to achieve a safe shutdown. [0003] The backup power supply of the pitch system is to provide energy to ensure that the system can drive the blades back to a safe position in the event of a grid failure. With the current...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06H02J7/00
CPCH02J9/06H02J7/007182Y02E10/76Y02B10/70Y02B70/30Y04S20/20
Inventor 杨忾李博余业祥王淋胡华东阳静
Owner 东方电气风电股份有限公司
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