【正文】 本科生畢業(yè)設(shè)計(jì)（論文） I 摘 要 本設(shè)計(jì)為建平變電所電氣部分的設(shè)計(jì)（ 110 kV/10kV）。 本次設(shè)計(jì)的變電所是在當(dāng)前建平縣概況的前提下進(jìn)行的，設(shè)計(jì)負(fù)荷充分的考慮到建平地區(qū)的工業(yè)及非工業(yè)情況，明確在變電所所有供電負(fù)荷中，哪些是 一級(jí)負(fù)荷，哪些是二、三級(jí)負(fù)荷，并對(duì)相應(yīng)的負(fù)荷采取不同的供電措施 ,以保證供電質(zhì)量和供電的可靠性。 因本次設(shè)計(jì)的 110KV 變電所 屬于高壓網(wǎng)絡(luò)，該地區(qū)變電站所涉及方面多，考慮問(wèn)題 也 多， 在 分析變電所擔(dān)負(fù)的任務(wù)及用戶(hù)負(fù)荷等情況 下 ， 慎重的進(jìn)行 選擇所址。充分 利用用戶(hù)數(shù)據(jù)進(jìn)行負(fù)荷 的統(tǒng)計(jì)和 計(jì)算，確定 對(duì)進(jìn)行用戶(hù)無(wú)功功率補(bǔ)償裝置， 同 時(shí)進(jìn)行 變電所主 變壓器的選擇 ，使變電所在能滿(mǎn)足當(dāng)前供電負(fù)荷的情況下，同時(shí)能滿(mǎn)足未來(lái) 510 年該地區(qū)的供電負(fù)荷。考慮安全、可靠、靈活和經(jīng)濟(jì)，確定變電所 的 電氣主接線的接線方式。再 進(jìn)行短路電流計(jì)算， 以便 選擇 設(shè)計(jì)變電所的高低壓電氣設(shè)備和導(dǎo)線，同時(shí)對(duì)它們進(jìn)行校驗(yàn) 。 本變電站的初步設(shè)計(jì)包括了：（ 1）總體方案的確定（ 2）負(fù)荷計(jì)算（ 3）主變壓器的選擇（ 4）電氣主接線的確定（ 5）高低壓配電系統(tǒng)設(shè)計(jì)（ 6）繼電保護(hù)（ 7）防雷與接地保護(hù)等內(nèi)容。 隨著電力技術(shù)高新化、復(fù)雜化的迅速發(fā)展，電力系統(tǒng)在從發(fā)電到供電的所有領(lǐng)域中，通過(guò)新技術(shù)的使 用，都在不斷的發(fā)生變化。變電站作為電力系統(tǒng)中 一 個(gè)關(guān)鍵的環(huán)節(jié)也同樣在新的技術(shù)領(lǐng)域得到了充分的發(fā)展。 關(guān)鍵詞： 變電站；負(fù)荷；主變壓器；電氣主接線； 高低壓電氣設(shè)備 本科生畢業(yè)設(shè)計(jì)（論文） II Abstract This design is a part of Jianping electrical substations excogitation(110 kV/10kV).The substation was designed on the basis of Jianping electrical power situation, think over the industry and nonindustrial of Jianping district to design, according to thinking about what is the first class load ,the second class load and the third class load explicit about the load of the substation in Jianping. Using the different measures in line with the relevant the load situation to ensure the quality of power supply and service reliability of customers. Because of this design are highvoltage work 110KV substation, substation in the area in more involved, consider the problem more, substation in the analysis tasks and user load such circumstances, careful to choose the site. Make full use of user data for statistical and puting load, determine for reactive power pensation device users, at the same time the choice of main transformer substation, to meet the current electricity substation in the case of load, at the same time the next 510 years to meet the region39。s electricity load. Consider safety, reliability, flexibility and economy, to determine the electrical substation main connection of wiring. Further shortcircuit current calculation, in order to choose the design of high voltage electrical substation equipment and wires, check them at the same time. The preliminary design of the substation including:(1)the overall scheme determined (2) load calculation (3) the choice of main transformer (4)Determination of Main Electrical Wiring (5)High and low voltage power distribution system design (6) lightning protection and grounding (7)Lightning protection and grounding . Key words： transformer substation。 load。 transformer。 main electrical connection。 high and low voltage electrical equipment 本科生畢業(yè)設(shè)計(jì)（論文） III 目 錄 第 1 章 緒 論 ........................................................................................................... 1 概述 ............................................................................................................ 1 課題來(lái)源及設(shè)計(jì)背景 ................................................................................ 2 第 2 章 變電站負(fù)荷計(jì)算和無(wú)功補(bǔ)償計(jì)算 ............................................................. 4 變電站的負(fù)荷 計(jì)算 .................................................................................... 4 變電站無(wú)功補(bǔ)償計(jì)算 ................................................................................ 7 第 3 章 主變壓器臺(tái)數(shù)和容量的選擇 ..................................................................... 9 變壓器選擇原則 ........................................................................................ 9 主變壓器臺(tái)數(shù)的選擇 ................................................................................ 9 第 4 章 電氣主接線的確定 ................................................................................... 11 主接線方案比較 ...................................................................................... 11 電氣主接線設(shè)計(jì)方案 .............................................................................. 12 第 5 章 短路計(jì)算 ................................................................................................... 16 短路電流的概述 ...................................................................................... 16 計(jì)算短路電流的目的 .............................................................................. 16 短路電流計(jì)算的步驟 .............................................................................. 18 第 6 章 電氣設(shè)備的選擇與校驗(yàn) ........................................................................... 23 電氣設(shè)備選擇和校驗(yàn)的原則 .................................................................. 23 高壓斷路器的選擇 .................................................................................. 24 110kV 電壓級(jí)斷路器 .................................................................... 24 10kV 電壓級(jí)斷路器 ...................................................................... 25 隔離開(kāi)關(guān)的選擇 ...................................................................................... 27 110kV 側(cè)隔離開(kāi)關(guān)的選擇 ............................................................ 27 10kV 側(cè)隔離開(kāi)關(guān)的選擇 .............................................................. 28 互感器的選擇 .......................................................................................... 29 電流互感器的選擇 ....................................................................... 29 電壓互感器的選擇 ....................................................................... 31 母線的選擇 .............................................................................................. 32 各電氣設(shè)備選擇結(jié)果表 .......................................................................... 33 第 7 章 主變壓器的繼電保護(hù)設(shè)計(jì) ....................................................................... 34 本科生畢業(yè)設(shè)計(jì)（論文） IV 繼電保護(hù)的目的 ...................................................................................... 34 繼電保護(hù)設(shè)計(jì) .......................................................................................... 34 第 8 章 防雷和接地保護(hù)設(shè)計(jì) ............................................................................... 40 變電所防雷設(shè)計(jì) ..............................................................................