摘 要
伴隨著國(guó)家智能電網(wǎng)的提出，以及特高壓輸電網(wǎng)絡(luò)的逐步形成，我國(guó)正在逐步擴(kuò)大西電東送的規(guī)模，完善區(qū)域主干網(wǎng)絡(luò)，加強(qiáng)發(fā)展特高壓等大容量、高效率、遠(yuǎn)距離先進(jìn)輸電技術(shù)。與此同時(shí)，電網(wǎng)事故也在逐漸升級(jí)，其中絕緣事故發(fā)生的頻率也顯著增多，因此采用先進(jìn)的檢測(cè)技術(shù)，及時(shí)發(fā)現(xiàn)并預(yù)告可腀@魷值納璞婦刀窕窒螅雜諫璞傅奈?、检修，避免道_鹿示哂兄匾南質(zhì)狄庖?。为此，本文开展了基又k賢餳觳夥ǖ奶馗哐故淶縵唄返繚畏諾繚諳嘸嗖庀低車難芯俊�
在本文的第一部分，主要針對(duì)氣體放電理論進(jìn)行了探討與研究，并詳細(xì)地介紹了氣體放電的基本條件和放電形式，特別是紫外檢測(cè)技術(shù)的原理與應(yīng)用以及利用紫外傳感器檢測(cè)設(shè)備絕緣狀態(tài)的獨(dú)特優(yōu)勢(shì)。
在本文的第二部分，主要設(shè)計(jì)了一種具有在線監(jiān)測(cè)功能的特高壓輸電線路電暈放電檢測(cè)系統(tǒng)。并重點(diǎn)闡述了本實(shí)驗(yàn)系統(tǒng)的構(gòu)成，以及各個(gè)模塊的作用和軟件實(shí)現(xiàn)方式，包括紫外傳感器及其驅(qū)動(dòng)電路，溫濕度傳感器SHT71的特點(diǎn)及其數(shù)據(jù)采集。并詳細(xì)地探討了GPRS在電力系統(tǒng)中的應(yīng)用與組網(wǎng)方式，以及如何利用LabVIEW完成上位機(jī)監(jiān)控軟件的設(shè)計(jì)、與下位機(jī)GPRS DTU的數(shù)據(jù)通信。
此外，本文著重開展了特高壓輸電線路絕緣故障的評(píng)估方法研究，針對(duì)紫外傳感器的響應(yīng)脈沖信號(hào)，通過統(tǒng)計(jì)分析，完成了對(duì)實(shí)驗(yàn)數(shù)據(jù)的前期處理以及后期對(duì)信號(hào)模型的AR功率譜分析，利用對(duì)其功率譜分析的結(jié)果，為判斷設(shè)備絕緣狀況提供一種新參考；深入研究了一種基于模糊推理的設(shè)備絕緣狀態(tài)評(píng)估新方法，給出了具體的絕緣狀態(tài)指數(shù)數(shù)值，為線路維護(hù)人員提供了一定參考依據(jù)。
最后，通過實(shí)驗(yàn)驗(yàn)證，本文所研究的電暈放電在線監(jiān)測(cè)系統(tǒng)具有較好的抗干擾能力，響應(yīng)速度快，具備遠(yuǎn)程通訊、實(shí)時(shí)在線等特點(diǎn)。針對(duì)具體的實(shí)際工程應(yīng)用，還需進(jìn)一步研究與探討。

關(guān)鍵詞：特高壓；電暈放電；在線監(jiān)測(cè)；LabVIEW；GPRS






































Abstract
With the proposed of Intelligent Power System, UHV transmission network has been gradually formed. Our country is gradually expanding the scale of power transmission from west to east and improving the regional backbone network to enhance the development of the transmission with advanced technology which has large capacity, high efficiency, long-distance and so on, such as UHV. But at the same time, there are more and more power grid accident flowing it. The frequency of insulation fault also increases everyday. So take advanced detection technique, timely discovery and fore notice those phenomenon which maybe characterized possible insulation deterioration of instrument, it have important reference value for the equipment maintenance, repair and also avoid power accident. On this basis, this paper carried out the research on one kind of online monitoring system which uses ultraviolet pulses number to characterize the condition of equipment insulation.
In the first part, it is a fundamental review of gas discharge theory that has been studied and researched in-depth, which contains its basic conditions, discharge forms, the principle of UV-detection technology and its practical application. At the end of this part, the great significance and unique advantages of testing the equipment’s insulation states based on the UV-technology is illustrated.
In the second part of this paper, a kind of corona discharge online monitoring detection system is introduced, especially its’ composition and the role of each module. Besides this, UV sensor and its’ drive circuit, the characteristics of temperature and humidity sensor SHT71 and its data collection are also discussed. What’s more, this paper not only discussed the application of GPRS in the power system and its networking mode, but also completed the PC monitoring software design with the LabVIEW and realized the communication between LabVIEW and lower computer.
In addition, through statistical analysis this paper completed the pre-processing of experimental data, and its’ power spectrum analysis of AR model at latter part. With the results, we have one new reference to judgment the equipment insulation. In another part of this paper, one kind of equipment insulation condition assessment method based on fuzzy inference is involved, which could provide us one concrete insulating state index values, it would be one important information for the equipment maintenance personnel.
Finally, with the experimental verification, the corona discharge monitoring system which is studied in this paper has many advantages, such as anti-interference ability, fast response, real-time online and so on. But it needs further study if we want to make it be useful for practical engineering.
Keywords: UHV; corona discharge; online monitoring; LabVIEW; GPRS






















目 錄
摘 要 I
Abstract III
目 錄 V
Contents VII
第1章 緒論 1
1.1 課題研究的背景與意義 1
1.2 電暈放電檢測(cè)技術(shù)的研究現(xiàn)狀 2
1.2.1電暈放電檢測(cè)技術(shù)的現(xiàn)狀 2
1.2.1.1紅外熱成像技術(shù) 2
1.2.1.2超聲電暈探測(cè)器 3
1.2.1.3基于紫外光譜的電暈放電探測(cè)技術(shù) 3
1.2.1.4紫外成像法 3
1.2.2 紫外檢測(cè)法在國(guó)內(nèi)外的發(fā)展?fàn)顩r 4
1.2.2.1 紫外檢測(cè)法在國(guó)外的發(fā)展..