220kv變電站一次系統設計

電子機電論文編號:JD071    字數:23631,頁數:66

目    錄
摘  要 ..................................................................I
ABSTRACT ...............................................................II
第1章引言 ..............................................................1
第2章 .主接線設計 .......................................................2
·2.1電氣主接線的一般要求 ...............................................2
·2.2主接線選擇的主要原則 ...............................................3
·2.3主接線方案設計......................................................3
·2.3.1 方案擬定及技術比較 ..............................................3
·2.3.2 方案的經濟性比較 ................................................5
·2.3.4主變的選擇 .......................................................9
·2. 3. 4. 1選擇原則 ....................................................9
·2.3.4.2容量計算 ......................................................10
本章小結.......................................................... .....11
第3章 站用電接線及設備用電源接線方案....................................12
·3.1 所用電源數量及容量................................................12
·3.2所用電源引接方式...................................................12
·3.3 所用變壓器低壓側接線..............................................12
·3.4所站用電接線 ......................................................13
·3.5備用電源 ..........................................................13
本章小結.......................................................... .....14
第4章短路計算 .........................................................15
·4.1短路故障產生的原因 ................................................15
·4.2 短路故障的危害 ...................................................16
·4.3 短路電流計算的目的 ...............................................16
·4.4短路電流計算的內容 ................................................17
·4.5 短路電流計算方法 .................................................17
·4.6三相短路電流周期分量起始值的計算 ..................................18
·4.6.1短路電流計算的基準值.............................................18
·4.6.2網絡模型 ........................................................18
·4.6.3三相短路電流周期分量起始值的計算步驟 ............................18
本章小結 ...............................................................22
第5章  設備的選擇及動、熱穩定校驗.......................................23
·5.1.按正常工作條件選擇電氣設備 .......................................23
·5.2.按短路狀態校驗....................................................24
·5.3 斷路器、隔離開關的選擇原則....................................... 25
·5.4.互感器的選擇......................................................28
·5.4.1電流互感器的選擇................................................ 28
·5.4.2 電壓互感器的選擇 ...............................................30
·5.4.3 熔斷器的選擇 ...................................................30
·5.4.4所設備如下表 ....................................................31
·5.5.裸導體的選擇 .....................................................33
·5.5.1  一般要求.......................................................33
·5.5.2導體的選擇 ......................................................34
·5.5.3 截面的選擇..................................................... 34
·5.6.運行方式分析 .....................................................37
本章小結............................................................... 38
第6章配電裝置 .........................................................39
·6.1配電裝置的基本要求.................................................39
·6.2配電裝置的類型及特點 ..............................................39
·6.3配電裝置的設計原則.................................................40
·6.4 配電裝置設計的基本步驟........................................... 41
·6.5配電裝置的選用 ....................................................41
·6.6電氣總平面布置 ....................................................43
本章小結 ...............................................................43
第7章 防雷及過電壓保護裝置設計..........................................44
·7.1避雷針............................................................ 44
·7.2避雷器 ............................................................45
·7.3防雷接地.......................................................... 46
·7.4變電所的防雷保護 ..................................................47
·7.5變電所的進線段保護.................................................48
·7.6 接地裝置..........................................................48
本章小結 ...............................................................48
第8章無功補償 .........................................................49
·8.1 提高功率因數的意義 ...............................................49
·8.2 補償裝置的確定....................................................49

·8.3功補償容量計算.................................................... 50
·8.3.1補償的最大容性無功量計算........................................ 50
·8.3.2變壓器補償的最大的容性無功量.................................... 51
本章小結 ...............................................................53
第5章結束語........................................................... 54
致謝 ..................................................................55
參考文獻 ...............................................................56
附錄................................................................... 57

摘  要

本文以220KV地區變電站設計為例，論述了電力系統工程中變電站部分電氣設計（一次部分）的全過程。通過對變電站的主接線設計，站用電接線設計，短路電流計算，電氣設備動、熱穩定校驗，主要電氣設備型號及參數的確定，運行方式分析，防雷及過電壓保護裝置的設計，電氣總平面及配電裝置斷面設計和無功補償方案設計，較為詳細地完成了電力系統中變電站設計。
限于畢業設計的具體要求和設計時間的限制，本畢業設計只對變電站電氣一次部分做了較為詳細的理論設計，而對其電氣二次部分并沒有涉及，這有待于在今后的學習和工作中進行研究。

關鍵詞：變電站   短路電流   動穩定   熱穩定   過電壓保護裝置  無功補償

ABSTRACT

The statement about the 220kv transformer area substation design, discussed some electrical transformer stations design (one part) in power systems engineering of the entire process. Through the main transformer stations wiring design, stations wiring design stations, short circuit current calculations, check electrical equipment moving and thermal stability, set the main electrical equipment models and the parameters, the operating mode, design over-voltage protection  and mine devices , design general electric graphic  and distribution devices flood, and without power compensation. Lastly,completed substation design in power system.  
Limited to the specific design requirements and design time of constraints, The design only is a part of the electrical transformer stations, and its second part did not involve, which research it in future study and work.
KEY WORDS:  Substation,  Short circuit currents , Moving stability，Thermal stability，Over-voltage protection devices，Without power compensation