【正文】 母線接線 ........................................................5 單母線分段接線 ....................................................5 雙母線接線 ........................................................6 橋形接線 ..........................................................6 雙母線分段接線 ....................................................6 可選方案的確定 ....................................................7 最佳方案的確定 .........................................................84 短路電流計算 ..............................................................9 等值電抗計算 ..........................................................9 220kV 側(cè)短路 ..........................................................10 110kV 側(cè)短路計算 ......................................................13 10kV 側(cè)短路計算 .......................................................165 電氣設(shè)備的選擇 ...........................................................20 220kV 側(cè)斷路器、隔離開關(guān)的選擇 ........................................20 斷路器的選擇 .....................................................20 隔離開關(guān)選擇 .....................................................21 110kV 側(cè)斷路器、隔離開關(guān)的選擇 ........................................21 斷路器的選擇 .....................................................21 隔離開關(guān)選擇 .....................................................22 10kV 進線斷路器、隔離開關(guān)的選擇 .......................................22 進線斷路器的選擇 .................................................22 進線隔離開關(guān)選擇 .................................................23 10kV 側(cè)出線配電裝置的選擇 ........................................23 10kV 母聯(lián)短路器的選擇 ............................................24 電壓互感器的選擇 .....................................................24 220kV 電壓互感器的選擇 ...........................................24 110kV 電壓互感器的選擇 ...........................................24 10kV 電壓互感器的選擇 ............................................25 220kV 和 110kV 出線電壓互感器的選擇 ...............................25 電流互感器的選擇 ......................................................25 220kV 母聯(lián)電流互感器的選擇 .......................................25 220kV 電流互感器的選擇 ...........................................26 110kV 電流互感器的選擇 ...........................................26 10kV 側(cè)變壓器保護電流互感器的選擇 ................................27 10kV 出線電流互感器的選擇 ........................................276 防雷和接地設(shè)計 ...........................................................28 防雷設(shè)計 ..............................................................28 變電站的直擊雷保護 ...............................................28 變電站的侵入雷電波保護 ...........................................29 變壓器的防雷保護 .................................................32 內(nèi)部過電壓保護 ...................................................32 接地設(shè)計 ..............................................................32 接地概述 .........................................................32 接地網(wǎng)型式的選擇 .................................................337 繼電保護的設(shè)計 ...........................................................34 概論 ..................................................................34 繼電保護裝置的設(shè)計原則 ...........................................34 繼電保護裝置的電源 ...............................................34 電力變壓器保護的設(shè)計 .................................................35 概述 .............................................................35 變壓器的瓦斯保護 .................................................36 變壓器電流速斷保護 ...............................................36 變壓器縱聯(lián)差動保護 ...............................................36總結(jié) .......................................................................38致 謝 ......................................................................39參考文獻 ...................................................................40附錄 .......................................................................411 緒論電力事業(yè)的日益發(fā)展緊系著國計民生。關(guān)鍵詞：變電站；主接線；變壓器220kV substation designABSTRACTPower system substation as an important part of the entire power system directly affects the safety and economic operation. To be designed in this paper is a stepdown substation substation in the system plays the role of aggregation and distribution of electric energy, charged with the factory to the region, the important task of rural electrification. The pletion of the substation will not only strengthen the local power grid work structure, but also for the local industrial and agricultural production provides enough power, so that the regional power grid so as to achieve safe, reliable and economic operation purposes. The paper 110kV substation once part of the electrical design, the first original data through the analysis and selection based on total load of the substation main transformer, the main wiring under both economical and reliable, flexible operation requirements, select the main connection of two programs to be selected A technical parison, out of poor program to determine the main electrical substation connection program. Second, the shortcircuit current calculation, obtained from the threephase short circuit calculation occurs when shortcircuit the voltage level of the bus, its steadystate current and the impact of shortcircuit current value. According to the results and the voltage level of voltage and maximum continuous operating current of the main electrical equipment selection and validation (including circuit breaker, disconnecting switch, current transformer, voltage transformer, etc.). Finally, the main draw of the electrical wiring diagram.keywords: substation。再根據(jù)計算結(jié)果及各電壓等級的額定電壓和最大持續(xù)工作電流進行主要電氣設(shè)備選擇及校驗 （包括斷路器、 隔離開關(guān)、 電流互感器、 電壓互感器等） 。本論文《220kV 降壓變電站設(shè)計》 ，首先通過對原始資料的分析及根據(jù)變電站的總負荷選擇主變壓器，同時根據(jù)主接線的經(jīng)濟可靠、運行靈活的要求，選擇了三種待選主接線方案進行了技術(shù)比較，淘汰較差的方案，確定了變電站電氣主接線方案。本論文中待設(shè)計的變電站是一座降壓變電站，在系統(tǒng)中起著匯聚和分配電能的作用，擔(dān)負著向該地區(qū)工廠、農(nóng)村供電的重要任務(wù)。待設(shè)計變電所與電力系統(tǒng)的連接情況如圖所示。 和 10kV 用戶負荷統(tǒng)計數(shù)據(jù)110kV 和 10kV 用戶負荷統(tǒng)計數(shù)據(jù)見表 表 2。教研室意見： 教研室主任（簽字）： 2022 年