本文選題：光纖光柵　切入點(diǎn)：架空輸電線路　出處：《燕山大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：架空輸電線路的不同形態(tài)的振動(dòng)會(huì)引起嚴(yán)重的事故,影響了電網(wǎng)穩(wěn)定和可靠的運(yùn)行。所以要想建設(shè)堅(jiān)強(qiáng)智能的電網(wǎng),對(duì)于如何準(zhǔn)確實(shí)時(shí)地監(jiān)測(cè)架空輸電線路的運(yùn)動(dòng)狀態(tài),是至關(guān)重要的。光纖布拉格光柵在近幾年的發(fā)展極為迅速,它是一種無源器件,具有優(yōu)良的應(yīng)力響應(yīng)特性。根據(jù)光纖布拉格光柵的應(yīng)力特性可制成用于測(cè)量振動(dòng)的傳感器,具有電氣絕緣、抗電磁干擾、體小質(zhì)輕、高靈敏度、高精度以及可進(jìn)行準(zhǔn)分布式和分布式測(cè)量等諸多優(yōu)點(diǎn),因此在架空輸電線路振動(dòng)測(cè)量的應(yīng)用上一定會(huì)有不錯(cuò)的前景。 本文基于光纖光柵振動(dòng)傳感解調(diào)方法,研究并設(shè)計(jì)了一套測(cè)量架空輸電線路振動(dòng)的系統(tǒng),主要工作如下： 分析了電線振動(dòng)測(cè)量的意義和三種振動(dòng)測(cè)量的方法,通過對(duì)比選取了光學(xué)式振動(dòng)測(cè)量方法。然后對(duì)光纖光柵的理論模型進(jìn)行了詳細(xì)的分析,得知溫度和應(yīng)力同時(shí)影響纖光柵波長(zhǎng)的變化。同時(shí),介紹了多種解調(diào)方案并詳細(xì)的介紹了基于F-P可調(diào)濾波器解調(diào)法應(yīng)用在振動(dòng)測(cè)量上的具體原理,并分析了這些解調(diào)方案的優(yōu)缺點(diǎn),可以作為電線振動(dòng)測(cè)量的參考方案。 針對(duì)原有的振動(dòng)傳感解調(diào)方案,提出基于2×2和3×3耦合器的解調(diào)方案。改進(jìn)了原有的懸臂梁式振動(dòng)傳感器,并分析了傳感器的具體安裝地點(diǎn)以及原理；詳細(xì)分析了解調(diào)系統(tǒng)的原理、PU算法,并對(duì)解調(diào)系統(tǒng)狀態(tài)特性進(jìn)行了仿真分析,得到了最大測(cè)量誤差和最高測(cè)量精度時(shí)的系統(tǒng)狀態(tài)。 用鋼尺代替電線進(jìn)行了單光柵振動(dòng)測(cè)量實(shí)驗(yàn),對(duì)實(shí)驗(yàn)數(shù)據(jù)和圖形進(jìn)行分析,得到了鋼尺振動(dòng)的基頻；為了滿足傳感器多點(diǎn)測(cè)量的需要,同時(shí)進(jìn)行了雙光柵的振動(dòng)測(cè)量實(shí)驗(yàn),得出了測(cè)量電線振動(dòng)所需要的波長(zhǎng)解調(diào)圖。
[Abstract]:Different forms of vibration of overhead transmission lines will cause serious accident, affect the grid stable and reliable operation. So we want to build strong smart grid, the motion state of how accurate real-time monitoring of overhead transmission lines, is very important. The fiber Prague grating in recent years of development is very rapid, it is a passive device has the characteristics of excellent stress response. According to the stress characteristics of fiber Prague grating sensor for measuring vibration can be made, with electrical insulation, anti electromagnetic interference, light weight, high sensitivity, high precision and can carry out many advantages of quasi distributed and distributed measurement, so there must be good the prospect of application in overhead transmission line vibration measurement.
Based on the method of fiber Bragg grating vibration sensing demodulation, a system for measuring the vibration of overhead transmission lines is studied and designed. The main work is as follows:
Analysis of the significance of wire vibration measurement and three kinds of vibration measurement, by comparing the selected measuring method of optical vibration. Then carried out a detailed analysis of the theoretical model of fiber grating, get the temperature and stress affected the change of wavelength of fiber grating. At the same time, introduced a variety of demodulation scheme and a detailed description of the F-P the adjustable principle in the application of vibration measurement based on filter demodulation method, and analyzes the advantages and disadvantages of these demodulation scheme, can be used as a reference for the wire vibration measurement.
According to the original vibration sensor demodulation scheme, put forward 2 x 2 and 3 x 3 coupler demodulation scheme based on improved cantilever vibration sensor of the original, and analyses the specific location of the sensor and the principle of detailed analysis; understand the principle of regulating system PU algorithm, and the demodulation system state simulation analysis of the system state of the maximum measurement error and the highest measurement accuracy.
The single grating vibration measurement experiment using the ruler instead of wire, the experimental data and graphic analysis, the fundamental frequency of ruler vibration; in order to meet the needs of multi-point measurement sensor, and vibration measurement experiment of double grating, the wavelength demodulation figure required measurement of wire vibration.

【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM75

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本文編號(hào)：1560047