【正文】 ........ 20 電氣設(shè)備選擇的技術(shù)條件 ........................................................................................... 20 環(huán)境條件 ....................................................................................................................... 22 斷路器隔離開關(guān)的選擇 .......................................................................................................... 23 35kV 側(cè)進(jìn)線斷路器、隔離開關(guān)的選擇 ...................................................................... 23 35kV 主變壓器側(cè)斷路器、隔離開關(guān)的選擇 .............................................................. 25 10kV 側(cè)斷路器、隔離開關(guān)的選擇 .............................................................................. 25 選擇的斷路器、隔離開關(guān)型號表 ............................................................................... 26 母線的選擇及校驗(yàn) .................................................................................................................. 27 母線導(dǎo)體選擇的一般要求 ........................................................................................... 27 35kV 母線的選擇 .......................................................................................................... 27 10kV 母線的選擇 .......................................................................................................... 29 母線選擇結(jié)果 ............................................................................................................... 29 互感器的選擇 .......................................................................................................................... 30 電流互感器的選擇 ....................................................................................................... 30 電壓互感器的選擇 ....................................................................................................... 31 熔斷器的選擇 .......................................................................................................................... 32 熔斷器概述 ................................................................................................................... 32 35kV 側(cè)熔斷器的選擇 .................................................................................................. 33 10kV 側(cè)熔 斷器的選擇 .................................................................................................. 33 配電裝置的選擇 ...................................................................................................................... 33 配電裝置概述 ............................................................................................................... 33 35kV 屋外配電裝置 ...................................................................................................... 33 10kV 高壓開關(guān)柜 .......................................................................................................... 34 8 繼電保護(hù)的設(shè)置 ............................................................................................................................... 35 電力變壓器保護(hù) ...................................................................................................................... 35 35kV 變電所電氣部分設(shè)計(jì) 第 3 頁 共 50 頁 電力變壓器保護(hù)概述 ................................................................................................... 35 電力變壓器縱差保護(hù)接線 ........................................................................................... 35 縱差動(dòng)保護(hù)的整定計(jì)算 ............................................................................................... 36 變壓器瓦斯保護(hù) ........................................................................................................... 37 過電流保護(hù) ................................................................................................................... 37 母線保護(hù) .................................................................................................................................. 38 9 變電所的防雷保護(hù) ........................................................................................................................... 38 變電所防雷概述 ...................................................................................................................... 38 避雷針的選擇 .......................................................................................................................... 39 避雷器的選擇 .......................................................................................................................... 40 結(jié)論 ........................................................................................................................................................ 41 致謝 ........................................................................................................................................................ 42 參考文獻(xiàn) ................................................................................................................................................. 43 35kV 變電所電氣部分設(shè)計(jì) 第 1 頁 共 50 頁 摘要 ： 隨 著 電力行業(yè)的不斷發(fā)展，人們對電力供應(yīng)的要求越來越高，特別是供 穩(wěn)固 性、可靠性和持續(xù)性。然而電網(wǎng)的穩(wěn)固性、可靠性和持續(xù)性往往取決于變電所的合理設(shè)計(jì)和配置。一個(gè)典型的變電站要求變電設(shè)備運(yùn)行可靠、操作靈活、經(jīng)濟(jì)合理、擴(kuò)建方便。出于這幾方面的考慮，本論文設(shè)計(jì)了一個(gè) 35kV 降壓變電站 ,此變電站有兩個(gè)電壓等級，一個(gè)是 35kV，一個(gè)是 10kV。同時(shí)對于變電站內(nèi)的主設(shè)備進(jìn)行合理的選型。本設(shè)計(jì)選擇選擇兩臺主變壓器，其他設(shè)備如斷路器，隔離開關(guān)，電流互感器，電壓互感器，無功補(bǔ)償裝置和繼電保護(hù)裝置等等也按照具體要求進(jìn)行選型、 設(shè)計(jì)和配置，力求做到運(yùn)行可靠，操作簡單、方便，經(jīng)濟(jì)合理，具有擴(kuò)建的可能性和改變運(yùn)行方式時(shí)的靈活性。使其更加貼合實(shí)際，更具現(xiàn)實(shí)意義。 關(guān)鍵詞 35kV 變電所 設(shè)計(jì) 35kV 變電所電氣部分設(shè)計(jì) 第 2 頁 共 50 頁 Abstract： Along with the continuous development of electric industry, people require increasingly demand of power supply, especially the stability, reliability and continuity of it. While the stability, reliability and continuity of power grid is determined by the rational design and configuration of substation. A typical substation needs the reliable and flexible operation, the economic rationality and free expansion of the equipments. For the consideration of these aspects, the paper designs a transformer substation of 35kV which has tow level of voltag