水電站畢業(yè)設(shè)計(jì)論文

摘 要
本次畢業(yè)設(shè)計(jì)的主要任務(wù)是根據(jù)原始資料進(jìn)行一個發(fā)電廠主接線的初步設(shè)計(jì)，并對其一次設(shè)備進(jìn)行選擇,進(jìn)而對繼電保護(hù)進(jìn)行規(guī)劃和對配電裝置進(jìn)行規(guī)劃。設(shè)計(jì)主要內(nèi)容包括：電氣主接線設(shè)計(jì)、短路電流計(jì)算、主要電氣設(shè)備選擇、校驗(yàn)及配電裝置初步設(shè)計(jì)和繼電保護(hù)的規(guī)劃等。主要的電氣設(shè)備選擇有：主變壓器、高壓廠用變壓器、高壓斷路器、隔離開關(guān)、電流互感器、電壓互感器、避雷器及母線等的選擇。
電氣主接線是發(fā)電廠的主要環(huán)節(jié)，故本文對數(shù)個電氣主接線方案進(jìn)行了技術(shù)經(jīng)濟(jì)綜合比較，確定了一個較佳方案，并根據(jù)此方案對全廠電氣設(shè)備的選擇、配電裝置的布置、繼電保護(hù)的規(guī)劃等，進(jìn)行了詳細(xì)的設(shè)計(jì)和說明。本設(shè)計(jì)包括六部分：電氣主接線選擇，電氣設(shè)備選擇，短路電流計(jì)算，配電裝置規(guī)劃，繼電保護(hù)規(guī)劃及其整定。
關(guān)鍵詞：發(fā)電廠； 主接線； 短路電流； 電氣設(shè)備； 配電裝置； 繼電保護(hù)
 
ABSTRACT
This graduation project topic is s according to the first hand information designs a electric power plant, and mainly carries on the design to its equipment. Then design the power distribution equipment and relay protection planning. Designs the main content to include: The electrical host wiring design, the wiring design, the short-circuit current computation, the main electrical equipment choice , the verification and the power distribution equipment preliminary design and relay protection planning and so on. The main choice electrical equipment includes: The main transformer, the high-pressured factory use the transformer, the high-pressured circuit breaker, the isolator, the current transformer ,the voltage transformer, the arrester and the generatrix and so on.
Main electrical scheme is the main part of substation, so this thesis synthetically compares several main electrical schemes from technical and economic aspects and picks up one preferable scheme. According to the chosen scheme, detailed design and instruction are carried out about the electric apparatus selection, distribution equipment arrangement, relay protection, and so forth.This thesis consist of six parts：main electrical scheme select，main choice electrical equipment，short-circuit current calculation，distribution equipment arrangement, relay protection and verification on the selection short dot.
Key words: electric power plant; electrical main wiring; short-circuit current; electrical equipment; the power distribution equipment; relay protection

 
目錄
1 前言 1
1.1 設(shè)計(jì)要求 1
1.2 設(shè)計(jì)依據(jù) 1
2 電氣主接線設(shè)計(jì) 2
2.1 電氣主接線概述 2
2.2 發(fā)電機(jī)出口接線形式的選擇 2
2.3 220KV側(cè)接線形式的選擇 4
3 主變及廠用變的選擇 8
3.1 變壓器選擇概述 8
3.2 主變選擇 8
3.3 廠用變選擇 9
4 短路電流計(jì)算 10
4.1 短路點(diǎn)的選取 10
4.2 三相對稱短路計(jì)算 10
4.3 不對稱短路計(jì)算 15
5 電氣設(shè)備的選擇 20
5.1 斷路器的選擇 20
5.2 隔離開關(guān)的選擇 24
5.3 母線的選擇 27
5.4 電流互感器的選擇 32
5.5 電壓互感器的選擇 36
5.6 絕緣子和穿墻套管的選擇 39
5.7 高壓熔斷器的選擇 41
5.8 發(fā)電機(jī)中性點(diǎn)接地設(shè)備的選擇 42
5.9 避雷器的選擇 43
5.10 廠用電高壓側(cè)電氣設(shè)備的選擇 44
6 繼電保護(hù)規(guī)劃 48
6.1 繼電保護(hù)概述 48
6.2 變壓器縱差保護(hù)計(jì)算 50
7 配電裝置規(guī)劃 53
7.1 配電裝置概述 53
7.2 配電裝置設(shè)計(jì) 54
總結(jié) 57
致謝 58
參考文獻(xiàn) 59
附錄 60