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A device and a method for controlling the safety emergency retraction of a wind turbine generator system

A wind turbine, emergency technology, applied in circuit devices, wind power generation, wind turbines, etc., can solve problems such as flying cars, inability to automatically perform emergency propeller retraction in time, etc., to avoid fatal damage.

Active Publication Date: 2019-01-08
HUNAN ELECTRICAL COLLEGE OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the backup power supply corresponding to a single blade is abnormal, the emergency propeller retraction action cannot be performed automatically in time. At this time, the wind turbine will bear a certain risk factor due to uneven load, and may even run away.

Method used

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  • A device and a method for controlling the safety emergency retraction of a wind turbine generator system
  • A device and a method for controlling the safety emergency retraction of a wind turbine generator system
  • A device and a method for controlling the safety emergency retraction of a wind turbine generator system

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] Such as figure 1 As shown in the figure, a device for controlling safe and emergency pitch retraction of wind turbines includes backup power supply Ⅰ, backup power supply Ⅱ, backup power supply Ⅲ, pitch motor Ⅰ for driving blade Ⅰ, pitch motor Ⅱ for driving blade Ⅱ, Pitch motor III for driving blade III, relay IKA1, relay IIKA2, relay IIIKA3, first relay KA1-1, second relay KA1-2, third relay KA1-3, fourth relay KA2-1, fifth relay Relay KA2-2, sixth relay KA2-3, seventh relay KA3-1, eighth relay KA3-2, ninth relay KA3-3;

[0025] The first relay KA1-1, the fourth relay KA2-1, and the seventh relay KA3-1 all have two normally open contacts, the second relay KA1-2, the third relay KA1-3, and the fifth relay KA2 -2. The sixth relay KA2-3, the eighth relay KA3-2, and the ninth relay KA3-3 all have one normally open contact and two normally closed c...

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Abstract

The invention discloses a device for controlling the safety and emergency retraction of a wind turbine generator system, which comprises a backup power source I, a backup power source II, a backup power source III, a pitch motor I, a pitch motor II, a pitch motor III, a relay I, a relay II, a relay III, and first to ninth relays; The first, fourth, and seventh relays each have two normally open contacts, and the second, third, fifth, sixth, eighth, and ninth relays each have one normally open contact and two normally closed contacts. As that backup power supply for each blade emergency retracting is redundantly design, it can be ensured that even in the case of an abnormal blade backup power supply, and can also be switched to a backup power supply of one of the other two blades accordingto the discriminant condition to perform the emergency oar retraction operation, Ensuring that the unit can be stopped in a safe state is conducive to ensuring that the blades can be recovered in timewhen the unit is in emergency, so as to avoid possible fatal damage to the unit caused by the blades being unable to be recovered in time.

Description

technical field [0001] The present invention relates to the field of wind power, in particular to a device and method for controlling safe and emergency blade retraction of a wind turbine. Background technique [0002] For wind turbines that use electric motors for synchronous pitch adjustment, when an emergency failure occurs, the wind turbines will retract the pitch in an emergency and ensure that the pitch angles of the three blades are basically consistent. During the emergency pitch retracting process, the power supply of the pitch motor comes from a set of backup power provided by each blade. When the backup power supply corresponding to a single blade is abnormal, the emergency propeller retraction action cannot be performed automatically in time. At this time, the wind turbine will bear a certain risk factor due to uneven load, and may even run away. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the present invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06F03D7/00
CPCH02J9/061F03D7/00H02J9/068Y02B10/70Y02E10/72Y02E10/76
Inventor 王艳黄建鹏罗小丽刘宗瑶
Owner HUNAN ELECTRICAL COLLEGE OF TECH
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