Fault protection method for wind turbine generator variable pitch system without independent controller

A technology for wind turbines and system failures, which is applied in the direction of wind turbines, control systems, and control of wind turbines, and can solve problems such as failure of blades to perform feathering, failure of feathering methods, and single protection strategy

CN107781106AInactive Publication Date: 2018-03-09CORONA WIND EQUIP BEIJING CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-03-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

Provided is a fault protection method for a wind turbine generator variable pitch system without an independent controller. Three-shaft blades of the wind turbine generator variable pitch system are respectively controlled by independent servo drives. The three-shaft servo drives are communicated with a wind turbine generator main control system by means of a CANopen network to realize a data exchange. The three-shaft blade servo drivers collect a piece of information of each shaft to determine the operating status of a device. When the status of the device is abnormal, the fault is triggeredand the fault flag bit is uploaded to the main control system. The wind turbine generator main control system sends an emergency feathering command so as to control each blade to execute the emergencyfeathering.
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Description

technical field

[0001] The invention relates to a fault protection method for a pitch control system of a wind power generating set without an independent controller. Background technique

[0002] With economic development, population growth, and people's life gradually becoming modernized, people's demand for energy is increasing significantly. At present, the main sources of energy are oil, coal, and natural gas, and these energy sources are non-renewable energy sources. The excessive use of these energy sources has caused severe environmental pollution. In recent years, severe smog has appeared in various cities across the country. This problem has caused local governments and The people attach great importance to it, and the fundamental solution to the problem of environmental pollution lies in finding clean and renewable energy.

[0003] As a highly efficient, clean and renewable energy, wind energy has been paid more and more attention by countries all over the world....

Examples

Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] As shown in the figure, the three-axis blades of the wind power generation control system and the variable pitch system without an independent controller are independently controlled by the servo drive, and the three-axis blade servo drive establishes communication through the CANopen network to realize data interaction. Among them, the wind power generation control system is the master station, and the three-axis blade servo driver of the pitch control system is the slave station.

[0023] The blade servo driver of the pitch control system collects the state information of each axis, completes fault judgment and classification, and uploads the fault flag to the wind power generation control system, and combines with the wind power generation control system to send instructions to implement fail-safe protection.

[0024] like figure 2 ...