Variable pitch self-protection system and method for wind turbine generator system

Abstract

The invention discloses a variable pitch self-protection system and method for a wind turbine generator system. The variable pitch self-protection system comprises a master control PLC with icebreaking logic, a variable pitch frequency converter with an icebreaking prediction algorithm, a current converter and a motor for driving blades to rotate, wherein the master control PLC with the icebreaking logic is connected with the input end of the variable pitch frequency converter with the icebreaking prediction algorithm, the output end of the variable pitch frequency converter with the icebreaking prediction algorithm is connected with the motor for driving the blades to rotate, and the current converter is connected with the variable pitch frequency converter with the icebreaking prediction algorithm. According to a blade freezing prediction algorithm, the variable pitch self-protection system enters the initiative ice removing steps when the freezing thickness of the blades reaches the automatic ice removing range or time of the automatic ice removing period is up. When the variable pitch self-protection system and method for the wind turbine generator system are applied, loads and capacity of the wind turbine generator system are improved, and the service life of the blades is prolonged.

Description

technical field [0001] The invention relates to a self-protection system, in particular to a pitch-changing self-protection system and method of a wind power generating set. Background technique [0002] With the increasing problems of carbon dioxide emissions, acid rain, and energy shortages, wind energy, as a clean and renewable energy source, has no environmental pollution problems that cannot be avoided by conventional energy sources. It has been widely concerned and prioritized by countries all over the world. my country has vast grasslands and a long coastline, and the reserves of wind energy resources are very rich. However, abundant wind resources are basically distributed in the ice and snow north and the coastal areas with high humidity. The environment is extremely harsh. When wind turbines operate at zero degrees Celsius or below zero , Ice and snow, especially when encountering supercooled water droplets, freezing phenomenon will occur. After the wind turbine ...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the shortcomings of long artificial deicing period and high cost, the present invention provides a self-protection system and method for wind turbine pitching, using mechanical methods to break the ice, and then using centrifugal force and vibration to remove the ice

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