某地區110KV降壓變電站設計

電氣工程論文編號:DQ047    論文字數:13655,頁數:40  附CAD圖

目 錄
摘  要------------------------------------------------------------------------------------Ⅰ
1  緒  論---------------------------------------------------------------------------------1
 1.1 設計背景-----------------------------------------------------------------------------1
 1.2 電力系統及變電站原始資料-----------------------------------------------------------1
 1.3 設計步驟及任務----------------------------------------------------------------------3
2  負荷資料統計-------------------------------------------------------------------------4
 2.1 負荷的分析--------------------------------------------------------------------------4
 2.2 負荷計算-----------------------------------------------------------------------------5
3  變電站主變壓器的選擇---------------------------------------------------------------7
 3.1 設計原則-----------------------------------------------------------------------------7
 3.2 主變容量與補償計算------------------------------------------------------------------7
 3.3 無功補償設計------------------------------------------------------------------------9
 3.4 主變型式的選擇---------------------------------------------------------------------11
 3.5 變壓器中性點接地方式和設備的選擇-------------------------------------------------12
 3.6 所用變設計-------------------------------------------------------------------------13
 3.7 電力變壓器的功率損耗--------------------------------------------------------------14
4  電氣主接線設計----------------------------------------------------------------------15
 4.1 電氣主接線設計原則與方法----------------------------------------------------------15
5  短路電流計算------------------------------------------------------------------------18
 5.1 短路電流計算目的-------------------------------------------------------------------18
 5.2 短路電流計算的一般規定------------------------------------------------------------18
 5.3 短路電流計算的步驟----------------------------------------------------------------18
 5.4 短路電流計算過程-------------------------------------------------------------------19
6  變電所進出線及母線選擇-----------------------------------------------------------25
 6.1 配電所母線選擇---------------------------------------------------------------------25
 6.2 110KV高壓架空線的選型與截面選擇-------------------------------------------------26
 6.3 10KV電纜選擇-----------------------------------------------------------------------27
7  主要電氣設備選擇-------------------------------------------------------------------29
 7.1 110KV側斷路器，隔離開關選擇------------------------------------------------------29
 7.2 10KV側斷路器，隔離開關選擇-------------------------------------------------------31
 7.3 電流互感器選擇---------------------------------------------------------------------34
 7.4 電壓互感器選擇---------------------------------------------------------------------35
 7.5 電氣設備選擇一覽表----------------------------------------------------------------36
8  總  結-----------------------------------------------------------------------------38
致  謝--------------------------------------------------------------------------------39
參考文獻------------------------------------------------------------------------------40
附錄----------------------------------------------------------------------------------41

摘  要
 畢業設計是對所學知識的一次綜合性運用，能夠加深我們對基礎知識的理解，為以后的工作打下良好基礎。變電站的一次接線指的是對用戶供電的部分。其中，對外供電的部分稱為主接線。為了變電站的生產和工作人員的生活對內供電的部分稱為站用電接線。本設計嚴格遵循變電所電氣部分的設計原則。通過對電氣主接線的設計和計算、所用電的設計和計算、短路電流的計算、電氣設備的選擇和校驗以及配電裝置的設計，完成了對所給（110KV）變電所的電氣一次部分的設計。
 由于條件的限制，本次畢業設計對變電站電氣一次部分作了較詳細的設計，而對于電氣二次部分進行了省略，希望在以后的學習和工作中可以進行更深入的研究。

關鍵詞：供電、主接線、設計、選擇和校驗

Abstract
Graduation project is a syntheses handle to the knowledge that we have learned. It can strengthen the comprehension to the basic knowledge and it is a favorable foundation to the work.. The primary distribution system of the substation refer versus user running part. The external power supply part is called main connection. The inter power supply part ,which supply for the work of transformer substation and for the workers’ life is called substation supply connection.This design follows the design principles of electric part of the substation strictly. Through the medium of designing and reckoning the electric main connection, designing and counting house supply, counting short-circuit current, selecting and verifying electrical equipment as well as designing switching arrangement, it have accomplished the design of the primary distribution system of the （110KV）substation that have been given.
Because of restrict of some conditions, in this dissertation, only the primary distribution system of the substation is designed, and the secondary distribution system, this paper have omited to do it, I looking forward to doing further study in the future.

Keywords：power supply，main connection，designation，choose and checkout