Wind turbine generator unit pitch system standby power supply online automatic detection method and device

Abstract

The invention discloses a wind turbine generator unit pitch system standby power supply online automatic detection method and device. The method comprises the following steps that A. detection parameter standards and relevant parameter standards for adopting standby power supply feathering are set, wherein the detection parameter standards comprise external constraint conditions and unit state conditions for starting detection; B. whether the external constraint conditions and the unit state conditions satisfy testing requirements or not is judged; C. if the external constraint conditions and the unit state conditions satisfy the testing requirements, standby power supplies start to be tested; D. a statistic analysis is conducted on detection data acquired by the step C, the detection data are compared with the set relevant parameter standards for standby power supply feathering, and if the detection data surpass the set standards, failure warning is carried out. The wind turbine generator unit pitch system standby power supply online automatic detection method and device can achieve performance detection of all wind turbine generator unit pitch system standby power supplies, are free of manual intervention and achieve online fault diagnosing or early warning through the modes of setting various parameter standards and time intervals of periodic detection.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to an online automatic detection method and device for a backup power supply of a pitch system of a wind turbine. Background technique [0002] The pitch system is not only the operation control mechanism of the variable speed variable pitch wind turbine generator set but also the safety guarantee mechanism. In many cases, it is necessary to quickly shut down the wind turbine through fast retraction of the pitch, so as to ensure the safety of the wind turbine. Especially in some emergency situations, it is necessary to quickly retract the propeller through the backup power supply of the pitch control system, so the reliability of its backup power supply is very critical. Compared with the 20-year design life of the whole wind turbine, the backup power life of the pitch system is relatively short. Its core parts: the battery is about 2 years, and the super capacitor is about 5 yea...

AI Technical Summary

Problems solved by technology

These methods are either time-consuming and labor-intensive, it is difficult to guarantee the detection and maintenance cycle, and they cannot continuously detect and count the backup power supply of the pitch system of each unit in batches to achieve early warning; The real discharge situation of the pitch system under load, especially when the wind turbine encounters sudden safety problems, the load on the pitch system is usually greater than the normal situation

[0004] Therefore, through regular manual testing, on the one hand, the workload of testing will increase with the increase in the number of installed machines, and the number of on-site maintenance personnel is limited, resulting in a long testing cycle and difficult to guarantee; on the other hand, it is difficult to count and process testing in a timely manner Data, can only find backup power sources that have problems, and it is difficult to give early warning to units with potential risks

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