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Anti-typhoon control method for wind farm

A technology for a wind farm and a control method, which is applied to the control of wind turbines, wind energy power generation, wind turbines, etc., can solve the problems of high maintenance cost of backup power supply, high investment cost, low return rate, etc., and achieves improved yaw reliability. , Sufficient response time, the effect of improving safety

Active Publication Date: 2015-08-12
GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the high-voltage power grid is powered off, the backup power supply is used to transmit power to ensure that the wind turbines track the change of wind direction in real time and ensure that the wind turbines are in a safe yaw position. However, due to the power consumption of all wind turbines in the entire wind farm Very high, resulting in high construction investment costs, and at the same time, the maintenance cost of backup power is also very high, resulting in unfavorable situations such as investment failure or low return rate

Method used

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  • Anti-typhoon control method for wind farm
  • Anti-typhoon control method for wind farm
  • Anti-typhoon control method for wind farm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1, taking A=20m / s, C=35m / s, F=8 degrees / s as an example to describe this control method in detail.

[0046] As mentioned above, when the wind speed is below 20m / s, anti-typhoon control, feathering and shutdown are not required.

[0047] If the typhoon comes and detects that the wind speed V=30m / s, then feather, stop and execute this control method, when it is actually detected that the wind direction change speed F is less than 8 degrees / s, that is, the wind direction changes slowly, perform step 107, and combine image 3 The coming direction of the wind is shown, and the fans numbered 1, 2, 3, 4, 5...16 are supplied with power in order to perform the yaw action; when the wind direction change speed F is detected to be greater than 8 degrees / s , that is, the wind direction changes rapidly, execute step 108, combining figure 2 As shown, power is supplied to the wind turbines with group numbers 1, 2, 3, 4...7 in sequence to perform the yaw action.

Embodiment 2

[0048] Embodiment 2, taking A=25m / s, C=35m / s, F=10 degrees / s as an example to describe this control method in detail.

[0049] As mentioned above, when the wind speed is below 25m / s, anti-typhoon control, feathering and shutdown are not required.

[0050] When the typhoon comes and detects that the wind speed V=30m / s, then feather, stop and execute this control method. When the actual detection of the wind direction change speed F is less than 10 degrees / s, that is, the wind direction changes slowly, perform step 107, combined with image 3 The coming direction of the wind shown is to supply power to the fans numbered 1, 2, 3, 4, 5...16 in order to perform yaw action; when the wind direction change speed F is detected to be greater than 10 degrees / s , that is, the wind direction changes rapidly, execute step 108, combining figure 2 As shown, power is supplied to the wind turbines with group numbers 1, 2, 3, 4...7 in sequence to perform the yaw action.

Embodiment 3

[0051] Embodiment 3, taking A=30m / s, C=50m / s, F=15 degrees / s as an example to describe this control method in detail.

[0052] As mentioned above, when the wind speed is below 30m / s, anti-typhoon control, feathering and shutdown are not required.

[0053] When a typhoon comes and detects that the wind speed V is between 30m / s and 50m / s, then feather, stop and execute this control method. When the actually detected wind direction change speed F is less than 15 degrees / s, that is, the wind direction changes slowly , step 107 can be executed to combine image 3 The coming direction of the wind shown, sequentially supply power to the fans numbered 1, 2, 3, 4, 5...16 to perform yaw action; when it is detected that the wind direction change speed F is greater than 15 degrees / s , that is, the wind direction changes rapidly, execute step 108, combining figure 2 As shown, power is supplied to the wind turbines with group numbers 1, 2, 3, 4...7 in sequence to perform the yaw action. ...

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Abstract

The invention discloses an anti-typhoon control method for a wind power plant. Different yawing power supply is performed according to wind speed levels so as to perform yawing motions and effectively cope with typhoon. When A<=wind speed V<C and F<=H, a standby power supply is utilized to supply power to fans one by one along the wind direction so as to perform the yawing motions, the implementation process can be achieved by utilizing the standby power supply small in capacity, and construction investment cost in adopting a high-capacity standby power supply is reduced in the control mode. When A<=wind speed V<C and F>=H, the fans are divided into groups along the wind direction, output power of the adopted standby power supply in the yawing power supply mode does not need to be designed to provide power needed for simultaneous yawing of all the fans in the wind power plant in one time, the output power of the standby power supply only needs to meet the power needed for the group with the maximum fan number so that the control process can be achieved, the capacity of the standby power supply can be effectively reduced, and the construction investment cost is reduced.

Description

[technical field] [0001] The invention relates to a typhoon-resistant control method for a wind farm. [Background technique] [0002] In typhoon-prone areas where megawatt-level wind turbines are installed, when typhoons come, the high-voltage power grid transmission failure or artificial power failure will cause the wind turbines to stop in their original state and cannot yaw. Due to the irregular trajectory of the typhoon, the wind speed and wind direction will change in real time, and the wind turbine needs to track the wind direction in real time according to the current wind speed and wind direction. [0003] Some wind farms did not design a backup power supply at the early stage of design or adopted a large-capacity backup power supply solution for power supply, such as large-capacity and high-priced lead-acid battery packs, diesel generators, etc. When the high-voltage power grid is powered off, the backup power supply is used to transmit power to ensure that the win...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/00
CPCY02E10/723Y02E10/72
Inventor 王松郭书敬黄建锋陈超赵旭
Owner GUANGDONG MINGYANG WIND POWER IND GRP CO LTD