110kV降壓變電所一次系統設計

電子機電論文編號:JD070    包括設計圖紙,字數:21633,頁數:62

目 錄

摘要............................................................... 1
第一章緒論 ........................................................ 4
第二章設計的要求 .................................................. 5
2.1  原始數據........................................................5
2.2  出線情況........................................................5
2.3  系統情況 .......................................................5
2.4. 環境條件 ...................................................... 5
第三章電氣主接線設計 ...............................................6
3.1電氣主接線選擇要注意的問題........................................6
3.1.1 運行的可靠.....................................................6
3.1.2 具有一定的靈活性 ..............................................7
3.1.3 操作應盡可能簡單、方便.........................................7
3.2  主變壓器選擇 ...................................................8
3.2.1  設計原則與規范................................................8
3.2.2  容量、臺數選擇及校驗......................................... 8
3.2.3  主變型式的選擇 .............................................. 9
3.3  主接線設計 ....................................................11
3.3.1  設計原則與規范...............................................11
3.3.2  110KV的接線形式..............................................13
3.3.3  35KV的接線形式 ..............................................15
3.4  所用電設計 ....................................................17
3.5  限流問題 ......................................................20
3.6  中性點設計 ....................................................20
3.6.1  設計原則 ....................................................20
3.6.2  電容電流計算 ................................................21
3.7  無功補償.......................................................22
3.7.1  無功補償意義.................................................22
3.7.2  無功補償方式 ................................................22
3.7.3  并聯電容器的選擇 ............................................23
第四章短路電流的計算 ..............................................26
   4.1短路計算的目的................................................26
   4.2 短路電流計算的一般要求.......................................26
   4.3 短路電流計算 ................................................27
   4.4 參數計算 ....................................................27
 4.5 網絡化簡及計算.................................................28
  4.5.1  110KV母線短路電流計算......................................28
  4.5.2  35KV母線短路電流計算 ......................................29
  4.5.3  10KV母線短路電流計算.......................................29
第五章電氣設備選擇 ................................................31
5.1  電氣設備選擇的主要任務 ........................................31
5.2  選擇導體和電氣的一般原則.......................................31
5.3  選擇導體和電氣的技術條件.......................................31
5.3.1  長期發熱選擇導體 ............................................32
5.3.2  按經濟電流密度選擇導體 ......................................32
5.3.2  導體、電氣設備的選型 ........................................32
5.4  校驗...........................................................34
5.5  具體運算 ......................................................35
5.6  電氣設備的選型 ................................................40
5.6.1  一般原則.....................................................40
5.6.2  設備選擇.....................................................40
5.7  選擇結果 ......................................................48
第六章  配電裝置設計和總平面布置設計................................51
6.1 配電裝置及電氣總平面設計的意義 .................................51
6.2 配電裝置的設計 .................................................51
6.2.1配電裝置設計應滿足的基本原則...................................51
6.2.2各電壓級配電裝置型式的選擇.....................................51
6.3總平面布置設計...................................................53
6.3.1 設計任務......................................................53
6.3.2總平面布置設計的基本原則 ......................................54
第七章  防雷設計 ...................................................55
7.1雷害的來源.......................................................55
7.2  直擊雷保護.....................................................55
7.2.1  保護對象.....................................................55
7.2.2  保護措施.....................................................55
7.2.3  避雷針保護應注意的問題 ......................................55
7.3  雷電侵入波保護.................................................56
7.3.1配電裝置對侵入雷電波的保護.....................................56
7.3.2  進線段保護...................................................57
7.4  避雷器的選型 ..................................................58
7.4.1  防雷保護計算 ................................................58
7.4.2  避雷器選擇 ..................................................58
致   謝 ........................................................... 59
參考文獻............................................................60

摘 要

本文根據任務書上所給的系統與線路及負荷參數，分析擬建變電站的進出線方向和負荷等資料，從可靠性、安全性、經濟性等方面考慮，確定了電氣主接線方式。并通過對負荷資料的分析，安全，經濟及可靠性方面考慮，確定了110kV，35kV，10kV以及站用電的主接線，然后又通過負荷計算及供電范圍確定了主變壓器臺數，容量及型號，同時也確定了站用變壓器的容量及型號，最后，根據最大持續工作電流及短路計算的計算結果，對高壓熔斷器，隔離開關，母線，絕緣子和穿墻套管，電壓互感器，電流互感器進行了選型，然后進行配電裝置和平面布置的設計以及防雷的設計,從而完成了110kV電氣一次部分的設計。
關鍵詞：變電站 變壓器  接線
Abstract
This article according to the system logical circuit which and the load parameter in the project description gives, the analysis plans to construct the transformer substation to enter material and so on going beyond a line direction and load, from aspects and so on reliability, security, efficiency considered, has determined the electrical main wiring way. And through to shoulders the material the analysis, safe, the economy and the reliable aspect considered, had determined 110kV,35kV,10kV as well as the station use electricity the main wiring, then calculated through the load and supplies power the scope to determine the main transformer Taiwan number, the capacity and the model, simultaneously also had determined stood with transformer's capacity and the model, finally, according to most greatly continually the operating current and the short circuit computation's computed result, to the high-pressured fuse, the isolator, the bus bar, the insulator and put on the wall drive pipe, the voltage transformer, the current transformer has carried on the shaping, then carried on the power distribution equipment and the plane layout design as well as the anti-radar design, thus has completed 110kV electricity partial designs.
Key word: Transformer substation transformer wiring