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Method and analog electronic circuit for the detection of faults in the hydraulic system of variation of blade pitch of a wind turbine
Method and analog electronic circuit for the detection of faults in the hydraulic system of variation of blade pitch of a wind turbine
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机译：用于检测风力涡轮机叶片节距变化的液压系统中的故障的方法和模拟电子电路
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摘要
Analog electronic circuit and method for the detection of faults in the hydraulic system of pitch variation of a wind turbine. The method comprises generating a residual signal (10) representative of a failure estimate in a hydraulic blade pitch variation actuator (107) of the hydraulic system of the turbine (100); and performing a processing, by an analog electronic circuit (190), of said residual signal (10) generated to estimate a failure in said hydraulic actuator (107) including: filtering the residual signal (10) at a cut-off frequency equivalent to a natural resonant frequency of the hydraulic actuator (107) implemented as a dynamic second-order servo-system model; amplify the filtered residual signal; grinding an equivalent, envelope signal of the amplified residual signal; tune a programmable reference voltage threshold value; comparing the equivalent, envelope signal with said programmable reference voltage threshold value providing a compared signal; binarizing said compared signal, and activating an indicator to indicate that a failure has occurred in the hydraulic actuator (107). (Machine-translation by Google Translate, not legally binding)
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