【正文】
畢 業(yè) 設(shè) 計(jì) [論 文 ] 題 目: 110KV 中間變電站一次部分設(shè)計(jì) 學(xué) 院: 電氣與信息工程學(xué)院 專(zhuān) 業(yè): 電氣工程及其自動(dòng)化 姓 名: 學(xué) 號(hào): 指導(dǎo)老師: 完成時(shí)間: 2021 年 5 月 30 日 摘 要 本科畢業(yè)設(shè)計(jì)(論文) 摘要 I 本次畢業(yè)設(shè)計(jì)的題目是 110KV 中間變電站一次部分設(shè)計(jì)。變電站直接影響著電力系統(tǒng)的安全與經(jīng)濟(jì)運(yùn)行,聯(lián)系著發(fā)電廠和用戶,具有分配和轉(zhuǎn)化電能的作用。電氣主接線是發(fā)電廠變電所的主要環(huán)節(jié),電氣主接線的擬定直接關(guān)系著全站電氣設(shè)備的選擇、配電裝置的布置的確定,是變電站電氣部分投資大小的決定性因素。 本文首先根據(jù)任務(wù)書(shū)上所給系統(tǒng)與線路及相關(guān)負(fù)荷的參數(shù),通過(guò)對(duì)負(fù)荷資料的分析進(jìn)行了負(fù)荷計(jì)算,根據(jù)負(fù)荷計(jì)算結(jié)果確定了主變壓器臺(tái)數(shù),容量及型號(hào),同時(shí)也確定了站用變壓器的容量及型號(hào),并從安全,經(jīng)濟(jì)及可靠性等方 面考慮,確定了 110kV, 35kV, 10kV 以及站用電的主接線方案。然后,進(jìn)行了短路電流計(jì)算,根據(jù)最大持續(xù)工作電流及短路計(jì)算的計(jì)算結(jié)果,對(duì)高壓斷路器、隔離開(kāi)關(guān)、電流互感器、電壓互感器、母線等主要電氣設(shè)備進(jìn)行了選擇和校驗(yàn)。最后做了對(duì)變電站的防雷保護(hù),從而完成了 110kV 中間變電站電氣部分的設(shè)計(jì)。 關(guān)鍵詞: 變電站; 變壓器; 主接線; 短路電流計(jì)算 Abstract The graduation project entitled the middle of the 110kV substation design. The 河南城建學(xué)院本科畢業(yè)設(shè)計(jì)(論文) Abstract II substation directly affect the safety and economic operation of the power system, linked to power plants and users, the role of the distribution and conversion of electric energy. The main electrical wiring is the main part of the power plant substation, main electrical wiring directly related to the formulation to determine the arrangement of the choice of the station39。s electrical equipment, power distribution unit, is the substation electrical part of the investment size of the decisive factors. According to the mission statement on to the system with the line and the relevant load the parameters, to load data analysis carried the load calculation, according to the load calculation to determine the number of main transformer, capacity and model, at the same time also determine the substation transformer of capacity and model, and from the security, economic and reliability considerations, 110kV, 35kV, 10kV and station power main wiring scheme. Then, the shortcircuit current calculation Results of calculations based on the maximum continuous operating current and short circuit, high voltage circuit breakers, disconnectors, current transformers, voltage transformers, bus and other major electrical equipment selection and verification. The final substation lightning protection, thus pleting the electrical part of the design of the middle of the 110kV substation. Keywords: substation。 transformer。 the main wiring。 shortcircuit current 河南城建學(xué)院本科畢業(yè)設(shè)計(jì)(論文) 目錄 III 目錄 摘 要 ???????????????????????? ??????? I Abstract ????????????????????????????? II 緒論 ...................................................................................................................................1 第一章 原始資料及其分析 .............................................................................................3 負(fù)荷的原始資料 ................................................................................................3 10KV 側(cè)負(fù)荷 ............................................................................................3 35kV 側(cè)負(fù)荷 ............................................................................................3 變電所計(jì)算負(fù)荷的確定 ....................................................................................4 負(fù)荷計(jì)算的方法 ......................................................................................4 10kV 側(cè)的計(jì)算負(fù)荷 ................................................................................5 35kV 側(cè)的計(jì)算負(fù)荷 ................................................................................5 110kV 變電所負(fù)荷計(jì)算表如下 ..............................................................5 第二章 變壓器的選擇 .....................................................................................................7 變壓器臺(tái)數(shù)的確定 ............................................................................................7 變壓器容量的確定 .............................................................................................7 主變型式 .............................................................................................................7 站用變壓器的選擇 .............................................................................................9 第三章 電氣主接線的確定 ........................................................................................... 11 電氣主接線設(shè)計(jì)的基本要求 .......................................................................... 11 10KV 母線接線選擇 .........................................................................................12 35KV 母線接線選擇 .........................................................................................13 第四章 短路電流計(jì)算 ...................................................................................................15 短路電流計(jì)算目的 ..........................................................................................15 短路電流計(jì)算的一般規(guī)定 ..............................................................................15 短路點(diǎn)的確定與短路電流計(jì)算 ......................................................................15 第五章 主要電氣設(shè)備選擇與校驗(yàn) ...............................................................................21 電氣設(shè)備的選擇 ..............................................................................................21 電氣設(shè)備選擇的一般要求 ....................................................................21 電氣設(shè)備選擇的一般原則 ....................................................................21 高壓斷路器和隔離開(kāi)關(guān)的選擇 .......................................................................22 110kV 斷路器和隔離開(kāi)關(guān)的選擇 ........................................................22 35kV 斷路器和隔離開(kāi)關(guān)的選擇 ..........................................................23 10kV 斷路器和隔離開(kāi)關(guān)的選擇 ..........................................................25 互感器的選擇 .................