Galloping preventing safety control method for wind generating set
A technology of wind turbines and wind generators, which is applied in the control of wind engines, wind engines, and wind power generation. It can solve problems such as the danger of flying cars and the inability to retract the three blades, and achieve the effect of improving safety levels and reducing potential safety hazards.
Active Publication Date: 2015-02-25
BEIJING ETECHWIN ELECTRIC +1
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Problems solved by technology
[0004] However, the disadvantages of the above-mentioned prior art are as follows: when a wind turbine failure occurs, the control system will start the shutdown process, stop the converter, no load will be applied, and the generator will be in the no-load operation state
As for the shutdown process, there is only one situation where the wind turbine may be in danger of speeding, that is, the three blades cannot be retracted at the same time.
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[0018] The present invention is further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.
[0019] A safety control method for preventing flying of wind turbines proposed by the present invention, such as figure 2 shown, including the following steps:
[0020] Step 1: After the wind turbine is started, it is normally operated and connected to the grid for power generation. When the wind turbine fails, the main control system PLC6 of the wind turbine enters the shutdown process.
[0021] Step 2: During the shutdown process, the three pitch actuators 5 will perform feathering action. Under normal circumstances, within 20 seconds (including 20 seconds), the three blades of the wind turbine are fully returned to the direction greater than 85°. If the propeller state or speed drops b...
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The invention provides a galloping preventing safety control method for a wind generating set, which particularly comprises the following steps: in case of troubles on the wind generating set, the master control system PLC ( programmable logic controller) of the wind generating set enters a stopping process; after stopping is judged or being under a PLC safe mode, a current transformer is started to enter into a safe mode, the safe mode of the current transformer can enable the current transformer to screen non-critical troubles and maintain the work of the wind generating set utmost, when the effective rotational speed of the wind turbine generator is higher than the starting rotational speed, the current transformer generates electricity and operates; and when the rotational speed of the wind turbine generator is not higher than the starting rotational speed, the current transformer is not in operation. According to the invention, the control link of the PLC safe mode is added, the safe grade of the control system of the wind generating set is enhanced greatly, and potential safety hazards caused by blower galloping due to incontrollable pitch variation are reduced greatly.
Description
technical field [0001] The invention relates to a safety control method for preventing flying of a wind power generating set. Background technique [0002] At present, the control system of megawatt-level direct-drive wind turbines has a relatively complete control logic and protection mechanism, which can prevent the occurrence of wind turbine speeding accidents. However, if the control system fails, the pitch mechanism will not be able to return to the feathering state, and the wind turbine generator will be continuously accelerated by the continuous wind energy, exceeding the structural load requirements of the wind turbine generator set tower, which will eventually lead to the breakage of the generator bearing or even the collapse of the unit, etc. The occurrence of a major flying accident. In the wind turbine generator control system, the protection mechanism is usually classified and judged according to each sub-component. Once the protection mechanism of any sub-comp...
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IPC IPC(8): F03D7/02
CPCY02E10/723Y02E10/72
Inventor 尹进峰刘炳吴先友蒋中川陈明亮
Owner BEIJING ETECHWIN ELECTRIC