冶金廠總降壓站設計

電氣工程論文編號:DQ064    論文字數:7388,頁數:28

目 錄
  摘要………………………………………………………………………………………………Ⅰ
1. 前言…………………………………………………………………………………………………1
 1.1  設計主要任務………………………………………………………………………………..１
 1.2  設計基本要求………………………………………………………………………………1
 1.3  設計的意義……………………………………………………………………………………1
2. 設計原始材料………………………………………………………………………………………2
3. 負荷計算及無功補償……………………………………………………………………………6
    3.1 車間和工廠的負荷統計…………………………………………………………………...6
    3.2 無功功率補償的計算……………………………………………………………………...8
4. 選擇總變電所變壓器的臺數及容量………………………………………………………10
    4.1 變電所變壓器臺數的選擇………………………………………………………….10
    4.2 變電所變壓器容量的選擇………………………………………………………….10
    4.3 變配電所主線的設計……………………………………………………………….11
5. 短路電流計算……………………………………………………………………………………13
    5.1 負荷中心的確定…………………………………………………………………..13
    5.2 短路電流的計算…………………………………………………………………14
6. 變電所一次設備的選擇及校驗…………………………………………………………17
    6.1 設備選擇原則………………………………………………………………………17
    6.2 設備的選擇………………………………………………………………………...17
    6.3 設備的校驗…………………………………………………………………………18
7. 總變電所高壓進出線的選擇………………………………………………………………21
    7.1  35KV高壓進線的選擇…………………………………………………………..21
    7.2  SL7-6300/35變壓器出線端至6.3KV主線電纜的選擇校驗…………………….21
    7.3  6.3KV母線到各車間變壓器的電纜選擇……………………………………….21
8. 繼電保護設置……………………………………………………………………………………23
    8.1 主變壓器的繼電保護裝置……………………………………………………….23
9. 防雷與接地設計…………………………………………………………………………………24
    9.1 防雷設計………………………………………………………………….24
    9.2 變電所公共接地裝置的設計……………………………………………24
10. 總結………………………………………………………………………………………………25
11. 致謝………………………………………………………………………………………………26
參考文獻…………………………………………………………………………………………27
附錄……………………………………………………………………………………………………28

摘  要

 本設計要涉及到的是變壓器進線出線的選擇，母線和電纜的選擇，無功功率的補償，繼電器，熔斷器的選型。變壓器的進出線主要考慮的是進線高壓電纜的選取，各廠區電纜的選擇是按各廠區負荷不同而選擇不同型號的電纜。
 由于采用多個變壓器進行供電，母線采用分段式，根據負荷平均的原則，在各條母線上分別連上各廠區的電纜。電氣主接線是變電所的主要環節，電氣主接線的擬定直接關系到全所電氣設備的選擇、配電裝置的布置、繼電保護和安全自動裝置的確定，是變電所電氣部分投資大小的決定性因素。
 無功功率的補償采用集中補償的方法來完成。對于每個負載線路，我們都進行了繼電保護，還配以熔斷器保護。此項設計比較完整的對整廠的供電系統進行了設計，對實際電路的敷設有一定的參考價值。

關鍵詞 供電設計；變壓器；斷路器

Abstract

 This course is designed primarily the electrical wiring in a 10KV transformer station Factory , which involved the transformer to the cable, the choice of bus bar and cable options, the compensation of wattless power , relays, the fuze protection.  The main problem of the Transformers into the project is the selection of high-tension cable lines, we choice the different models of electricity which was based on loading of the district.
 With the introduction of several transformers for power supply, the introduction of sub-bus bar, according to the principles of the average load in two separate generating lines, distributing the loads in two separate generating line. Electricity lord connects line is the vital link of transformer substation in power plant, the draft of the electricity lord connects line relates directly to the choice of the whole substation's electric equipments, the arrangement of the distribution electricity device, the determination of the relay protection of power system and the automatic device, It is a decisive factor of the invests size to the transformer substation electricity part.
 We use to the method of complete concentration to compensate the wattless power .For each line; we have a relay, coupled with fuze protection. The design of the power supply system is a rather integral design; there are certain reference values to next design.
Keywords  the  design  of  power；transformer；breaker