【正文】 ..........................................................1 輸電線路故障定位研究的意義 ..............................................................................................1 故障定位方法研究的發(fā)展 ......................................................................................................1 國內(nèi)外故障測距研究現(xiàn)狀和主要方法 ..................................................................................2 阻抗法 .............................................................................................................................2 行波法 .............................................................................................................................3 行波定位存在的問題 .....................................................................................................5 本論文研究的主要工作 ..........................................................................................................6第二章 分布式故障定位裝置的理論基礎(chǔ) .................................................................................8 行波的基本理論 ......................................................................................................................8 長距離輸電線路的波過程 .............................................................................................8 行波的反射與折射 .......................................................................................................11 行波的衰減與變形 .......................................................................................................13 分布式輸電線路故障定位原理 ............................................................................................14 故障暫態(tài)行波的產(chǎn)生 ...................................................................................................14 非金屬性接地故障電流行波特性 ................................................................................15 金屬性接地故障電流行波特性 ...................................................................................17 檢測點安裝位置的確定 ...............................................................................................18 測距方程的確定 ...........................................................................................................19 真?zhèn)喂收宵c識別 ...........................................................................................................20 分布式行波故障定位裝置的技術(shù)難點 ................................................................................21 行波信號的采樣與存儲 ...............................................................................................22 故障電流采集的觸發(fā) ...................................................................................................22 行波到達時間的獲取 ...................................................................................................22 本章小結(jié) ...............................................................................................................................23第三章 分布式行波故障定位系統(tǒng)的硬件設(shè)計 ..............................................................................24 硬件的整體結(jié)構(gòu) .........................................................................................................................24 供電部分設(shè)計 ........................................................................................................................25 供電模塊設(shè)計要求 .......................................................................................................26 CT 取電工作原理 ..........................................................................................................26 鐵芯的選型和性能測試 ...............................................................................................27 鋰電池的電源控制 .......................................................................................................28 主控單元設(shè)計 ........................................................................................................................31 用于輸電線路故障定位的導(dǎo)線監(jiān)測裝置的研制 GSM 無線通信部分設(shè)計 .........................................................................................................32 無線傳感網(wǎng)絡(luò)的設(shè)計 ............................................................................................................34 本章小結(jié) ...............................................................................................................................37第四章 故障行波數(shù)據(jù)采集模塊的設(shè)計 .........................................................................................38 基于 ROGOWSKI線圈的電流傳感器單元 .................................................................................38 Rogowski 線圈的主要特征 ..........................................................................................38 Rogowski 線圈的工作原理 ..........................................................................................39 Rogowski 線圈的分類 [45].............................................................................................40 Rogowski 線圈的誤差分析 ..........................................................................................41 電流數(shù)據(jù)采集單元硬件設(shè)計 ................................................................................................43 常態(tài)電流采集 ...............................................................................................................43 高頻故障電流采集單元 ...............................................................................................47 信號調(diào)理電路 ...............................................................................................................48 采樣誤差分析 ...............................................................................................................50 故障電流采集數(shù)據(jù)的存儲 ....................................................................................................51 暫態(tài)行波采集的啟動單元 ....................................................................................................53 本章小結(jié) ...............................................................................................................................54第五章 分布式行波故障定位系統(tǒng)的軟件設(shè)計 .............