發(fā)布時間：2018-04-04 13:47

  本文選題：液壓變槳距系統(tǒng)　切入點：故障診斷　出處：《上海電機學院》2017年碩士論文

【摘要】：液壓變槳距系統(tǒng)是風力發(fā)電機重要的組成部分,對確保風力發(fā)電機的正常運行起到了至關(guān)重要的作用。由于風力發(fā)電機的液壓變槳系統(tǒng)故障發(fā)生頻繁,因此對風電機組的液壓變槳系統(tǒng)進行故障診斷具有十分重要的意義。基于觀測器的方法是故障診斷領(lǐng)域中的一個重要方法。本文首先對風力發(fā)電機液壓變槳系統(tǒng)建立數(shù)學模型,然后利用觀測器方法設計液壓變槳系統(tǒng)的殘差生成器,最后通過對殘差的分析評價來診斷風機液壓變槳系統(tǒng)發(fā)生的故障。針對風力發(fā)電機液壓變槳系統(tǒng)中存在未知干擾的情況,本文首先利用特征結(jié)構(gòu)配置方法來設計魯棒殘差生成器,以達到殘差與干擾相解耦的目的。此外,本文對傳統(tǒng)特征值結(jié)構(gòu)配置方法作出了一些改進,簡化了具體的計算難度,并給出了具體的設計步驟。最后,本文通過對風力發(fā)電機液壓變槳系統(tǒng)的特定故障進行仿真,驗證該方法的有效性和優(yōu)越性。針對風力發(fā)電機液壓變槳系統(tǒng)模型中存在的不確定性以及噪聲等對故障診斷準確性的影響,本文首先利用未知輸入觀測器的方法,將模型不確定性、噪聲以及未知輸入干擾等統(tǒng)一作為系統(tǒng)的未知輸入,然后設計魯棒殘差生成器,使未知輸入與液壓變槳系統(tǒng)發(fā)生的故障相解耦,從而實現(xiàn)對液壓變槳系統(tǒng)的故障診斷,最后通過仿真驗證該方法的有效性和優(yōu)越性。
[Abstract]:Hydraulic variable pitch system is an important part of wind turbine and plays an important role in ensuring the normal operation of wind turbine.The fault diagnosis of hydraulic variable propeller system of wind turbine is very important because of frequent faults of hydraulic variable propeller system of wind turbine.Observer-based approach is an important method in the field of fault diagnosis.In this paper, the mathematical model of hydraulic variable propeller system of wind turbine is established, then the residual generator of hydraulic variable propeller system is designed by using observer method. Finally, the fault of fan hydraulic variable propeller system is diagnosed by analyzing and evaluating the residual error.In view of the unknown disturbance in the hydraulic variable propeller system of wind turbine, the robust residuals generator is designed by using the characteristic structure configuration method in this paper, in order to decouple the residual and disturbance.In addition, this paper makes some improvements to the traditional eigenvalue structure configuration method, simplifies the concrete calculation difficulty, and gives the concrete design steps.Finally, the effectiveness and superiority of the method are verified by the simulation of the specific faults of the hydraulic variable propeller system of the wind turbine.In view of the uncertainty existing in the model of wind turbine hydraulic variable propeller system and the influence of noise on the accuracy of fault diagnosis, this paper firstly uses the unknown input observer to make the uncertainty of the model.Noise and unknown input interference are unified as the unknown inputs of the system. Then a robust residuals generator is designed to decouple the unknown inputs from the faults occurring in the hydraulic propeller system, so as to realize the fault diagnosis of the hydraulic propeller system.Finally, the effectiveness and superiority of the method are verified by simulation.
【學位授予單位】：上海電機學院
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM315

【參考文獻】

相關(guān)期刊論文 前10條

1 秦利國;何瀟;周東華;;一種基于魯棒殘差生成器的故障估計方法[J];上海交通大學學報;2015年06期

2 謝輝;閆利文;艾存金;王福山;;兆瓦級風力發(fā)電機液壓偏航系統(tǒng)閥塊設計與AMESim模型仿真[J];液壓氣動與密封;2015年05期

3 李志農(nóng);朱明;褚福磊;肖堯先;;基于經(jīng)驗小波變換的機械故障診斷方法研究[J];儀器儀表學報;2014年11期

4 張文s，

本文編號：1710213