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Wind turbine generator set overspeed protection auxiliary control method including torque control

A wind turbine, overspeed protection technology, applied in the direction of speed control, wind power generation, engine control, etc., can solve the huge safety and risk problems of wind turbines, and achieve the effect of reducing operational safety risks and preventing speeding

Pending Publication Date: 2021-06-15
NORTHWEST BRANCH OF CHINA DATANG CORP SCI & TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an auxiliary control method for wind turbine overspeed protection including torque control, which solves the problem in the prior art that when the wind turbine runs at overspeed and the safety chain protection fails, it will bring huge damage to the wind turbine. security risk issue

Method used

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  • Wind turbine generator set overspeed protection auxiliary control method including torque control
  • Wind turbine generator set overspeed protection auxiliary control method including torque control

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Embodiment

[0044] The basic parameters of a wind turbine are as follows:

[0045] Rated power Pn=2000kW; rated voltage Un=690V; rated load torque Tn=10kN m; impeller overspeed protection setting Vset=19.2rpm;

[0046] The control parameters are set as follows:

[0047] K1 indicates the degree to which the speed of the wind turbine exceeds the protection setting, where K1=1.2;

[0048] K2 represents the proportional control coefficient of load torque, where K2=1.4;

[0049] T1 indicates the time to delay judging whether the speed drops after the fan overspeed for the first time, and its value can be selected according to the action response time of the safety chain overspeed protection, where T1=4s;

[0050] T2 indicates the delay time to determine whether the speed has dropped after the fan starts and stops normally. Its value is selected according to the normal shutdown action time and normal propeller retraction speed. It takes about 5s to calculate the time for retracting the prope...

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Abstract

The invention discloses a wind turbine generator set overspeed protection auxiliary control method including torque control, and the method specifically comprises the steps: judging whether the rotating speed of a wind turbine generator set in the operation process is in a normal range or not, and starting an overspeed protection auxiliary control mode if the rotating speed is not in the normal range; and reducing the rotating speed of the wind turbine generator set in a mode of combining a normal shutdown mode, a torque control mode and an emergency yaw mode. As redundancy protection, multiple protections can be provided for overspeed faults of the wind turbine generator set, so that the operation safety risk of the wind turbine generator set is reduced, and serious accidents such as galloping and tower falling of the wind turbine generator set are prevented.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and relates to an auxiliary control method for overspeed protection of wind turbines including torque control. Background technique [0002] If the speed of the wind turbine exceeds the protection setting value during operation, the safety chain protection will be triggered, and the unit will immediately perform an emergency stop action. If the protection device does not operate normally due to electrical, mechanical failure, logic loopholes, etc., it will bring huge safety risks to the wind turbine, and in severe cases, accidents such as speeding and falling towers will occur. In particular, when the fan is operating under load limit or the safety chain protection is triggered, the load current is small or even zero, and the braking effect of the load torque will not be able to play. If the braking link of the fan stops at this time, there is a failure, and the overspeed situation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/04F03D7/02
CPCF03D7/042F03D7/0204F03D7/0224F03D7/0276F05B2270/1011F05B2270/304Y02E10/72
Inventor 摆念宗李臻贾晓韪
Owner NORTHWEST BRANCH OF CHINA DATANG CORP SCI & TECH RES INST
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