Active anti-frosting system of wind power converter

Abstract

The invention provides an active anti-frosting system of a wind power converter. The system comprises a processor, a generator, first and second insulated gate bipolar transistors and first and secondsub converters, wherein the processor is connected to the input end of the generator, and the generator is controlled by the processor and generates power; the input end of the first insulated gate bipolar transistor is connected to the output end of the generator while the other end of the first insulated gate bipolar transistor is connected to the input end of the first sub converter; the inputend of the second insulated gate bipolar transistor is connected to the output end of the generator and the output end of the second insulated gate bipolar transistor is connected to the input end ofthe second sub converter; the output ends of the first and second sub converters are connected to the processor; the first and second insulated gate bipolar transistors are controlled by the processor to be started or stopped, so that the voltage rise speed of a voltage current through the sub converters is controlled, and therefore, the excitation size of the generator by the sub converters is controlled to adjust the temperature of the generator.

Description

Technical field [0001] The invention relates to the technical field of wind power devices, in particular to an active anti-frost system for a wind power converter. Background technique [0002] When wind turbines work in cold or humid areas, there is a problem of cable insulation degradation. The low temperature environment will cause the cable to become brittle and the insulation drop, and the cable insulation breakdown is prone to occur; in the high humidity environment, the cable is prone to condensation, which can easily lead to the short-circuit failure of the wind turbine. [0003] In order to ensure the reliable operation of wind turbines, anti-condensation protection is required in actual wind turbine applications in cold areas, such as northeast and other high-cold areas. At present, two methods of humidity or temperature control are mainly used. Humidity control refers to the use of dehumidifiers or desiccants to reduce the absolute humidity of the air in the cabinet, re...

AI Technical Summary

Problems solved by technology

Both of these methods need to add auxiliary equipment to achieve condensation protection, which increases the cost of the system and reduces the reliability of operation

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