Test system and test method for backup power supply of wind turbine pitch system

Abstract

The invention provides a test system and a test method of backup power of a pitch system of a wind turbine generator set. The test system of the backup power of the pitch system of the wind turbine generation set comprises a controller, a loading assembly and a pitch drive; the controller comprises a computing unit, a loading output terminal and a pitch output terminal; the computing unit is used for computing a set value of torque and a set value of a pitch angle of all working conditions according to a preset algorithm and respectively outputting the set value of the torque and the set value of the pitch angle from the loading output terminal and the pitch output terminal; the loading assembly are respectively connected with the loading output terminal and a pitch motor; and the pitch drive is connected with the pitch output terminal and the backup power to be measured. The test system of the backup power of the pitch system of the wind turbine generation set has the advantages of having no influence on safe operation of the wind turbine generation set; avoiding accidents; and satisfying a security testing requirement of the backup power due to the fact that a field test can be performed without accomplishment of integral hoisting of the wind turbine generator set.

Description

technical field [0001] The invention relates to wind power generation technology, in particular to a test system and a test method for a backup power supply of a pitch system of a wind turbine. Background technique [0002] In a wind turbine, the pitch system is an important part of the wind turbine, and the pitch system mainly includes a controller, a pitch driver, and a pitch motor. The controller calculates the desired pitch angle according to the corresponding working conditions, and then sends instructions to the pitch driver corresponding to each blade to control the rotation of the pitch motor to drive the blades to change the pitch angle and complete the desired pitch action. Meet pitch requirements. [0003] When the grid voltage is normal, the grid serves as the power supply for the pitch drive. When the grid loses power or the grid fails, the grid needs to automatically switch to the backup power supply. The backup power supply is used as the input power to suppl...

AI Technical Summary

Problems solved by technology

[0004] At present, the performance of the backup power supply is usually tested through on-site actual operation after the overall hoisting of the wind turbine unit is completed. If a fault occurs during the power supply test, the blades cannot be feathered, which may cause the wind turbine to stop safely and affect the safe operation of the wind turbine, so it may damage the equipment in the wind turbine and even cause a safety accident

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