【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 .................................................................................................................. 27 母線導體選擇的一般要求 ........................................................................................... 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 繼電保護的設(shè)置 ............................................................................................................................... 35 電力變壓器保護 ...................................................................................................................... 35 35kV 變電所電氣部分設(shè)計 第 3 頁 共 50 頁 電力變壓器保護概述 ................................................................................................... 35 電力變壓器縱差保護接線 ........................................................................................... 35 縱差動保護的整定計算 ............................................................................................... 36 變壓器瓦斯保護 ........................................................................................................... 37 過電流保護 ................................................................................................................... 37 母線保護 .................................................................................................................................. 38 9 變電所的防雷保護 ........................................................................................................................... 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 ................................................................................................................................................. 43 35kV 變電所電氣部分設(shè)計 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)計和配置。一個典型的變電站要求變電設(shè)備運行可靠、操作靈活、經(jīng)濟合理、擴建方便。出于這幾方面的考慮，本論文設(shè)計了一個 35kV 降壓變電站 ,此變電站有兩個電壓等級，一個是 35kV，一個是 10kV。同時對于變電站內(nèi)的主設(shè)備進行合理的選型。本設(shè)計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，無功補償裝置和繼電保護裝置等等也按照具體要求進行選型、 設(shè)計和配置，力求做到運行可靠，操作簡單、方便，經(jīng)濟合理，具有擴建的可能性和改變運行方式時的靈活性。使其更加貼合實際，更具現(xiàn)實意義。 關(guān)鍵詞 35kV 變電所 設(shè)計 35kV 變電所電氣部分設(shè)計 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