【正文】 農(nóng)村 35kV 無人值守變電所設計 I 農(nóng)村 35kV 無人值守變電所設計 摘要 隨著電網(wǎng)容量的增加，綜合自動化水平的需求，無人 值守 變電所的建設已經(jīng)是當今電力事業(yè)發(fā)展的潮流。 本變電所位于鄉(xiāng)鎮(zhèn)邊緣，公路交通方便， 主要為生活用電和農(nóng)業(yè)用電所設計的，以三類負荷為主。 35kV 側采用 一回進線、主變壓器采用一臺 S6— 3150/35 型 雙繞組 變壓器；主變壓器 35kV 側采用 SW335 型斷路器配合 GW5GD600 型隔離開關作為保護和控制；10kV 側采用單母線接線；出線 4 回； 10kV 主進線采用 LN210 型 SF6 斷路器、出線采用斷路 器 與保護控制器配合作為控制和保護 。 10kV 側 電容器選用集合式 BFM 型并聯(lián)電容器；電流互感器和電壓互感器均選用干式互感器； 35kV， 10kV 側 避雷器全部選用HY5W5 型閥型避雷器。 二次設備采用綜合自動化裝置 LFP900 系列。 關鍵詞 ： 無人值守 繼電保護 電氣設備 Abstract 農(nóng)村 35kV 無人值守變電所設計 II With the increase of the capacity of the electric wire ting , improvement of the voltage grade, the demand for the prehensive automation level, the construction of the transformer substation with no guard is nowadays trend of development of electric cause. This transformer substation lies in the edge of villages and towns, the highway munication is convenient, mainly design in order to live with the electricity with electricity and agriculture, take three kinds of load as the core. 35kV side adopt one enter line , main voltage transformer adopt one capacity S6 3150/35 type to have , transfer and pigeonhole the voltage transformer year。 The main voltage transformer 35kV side adopts the circuit breaker of the Model SW335 to cooperate with the GW5GD600 type to isolate the switch as protecting and controlling。 10kV side adopt single bus bar simple and easy to segment wiring。 Qualify for the next round of petitions 4 times。 10kV enter line adopt Model LN210 vacuum circuit breaker , qualify for the next round of petitions , adopt circuit breaker with protect controller cooperate as controlling and protecting mainly. 10kV side condenser selects the set type BFM type for use and connects the condenser in parallel。 The mutual inductor of the electric current and voltage mutual inductor select the doing type mutual inductor for use 。 35kV, all 10kV arresters select the valve type arrester of Model HY5W5 for use. Apparatus two times adopts the device LFP900 series of prehensive automation. Keyword: Nobody39。s electric equipment of relay protection on duty農(nóng)村 35kV 無人值守變電所設計 III 目錄 摘要 .................................................................................................................................. I Abstract .......................................................................................................................... I 目錄 ............................................................................................................................... III 1 前言 ............................................................................................................................. 1 設計的原則以及設備選型 ................................................................................... 1 電氣主接線 ............................................................................................. 1 主要設備選型 ......................................................................................... 2 所用電及照明 ......................................................................................... 2 設計中應注意的問題 .......................................................................................... 2 2 負荷統(tǒng)計及其計算 ........................................................................................................ 3 負荷統(tǒng)計表 ......................................................................................................... 3 負荷計算 ............................................................................................................ 3 變電所各用戶計算負荷 ........................................................................... 3 變電所當年的負荷 ................................................................................. 3 3 變壓器容量的選擇與主接線的設計 ............................................................................. 5 主變容量及臺數(shù)的選擇 ....................................................................................... 5 主接線形式的確定 ............................................................................................. 5 4 短路計算 ....................................................................................................................... 6 短路計算的目的 .................................................................................................. 6 各元件電 抗標幺值計算 ....................................................................................... 6 短路點的確定 ..................................................................................................... 6 最大運行方式各短路點電流 ................................................................... 7 最小運行方式各短路點電流 ................................................................... 8 5 電氣設備的選擇與校驗 ...............................................................................................10 高壓側電氣設備的選擇及校驗 ...........................................................................10 高壓側母線的選擇及校驗 ......................................................................10 高壓側隔離開關的選擇 .......................................................................... 11 高壓電流互感器的選擇 .......................................................................... 11 高壓側斷路器的選擇及校驗 ..................................................................12 (1) 35kV 側高壓斷路器的最大長期工作電流計算如下： ................................12 高壓側懸式絕緣子的選擇 ......................................................................13 低壓側電氣設備的選擇與校驗 ...........................................................................14 低壓側母線的選擇及校驗 ......................................................................14 低壓側斷路器的選擇及校驗 ....................................................................15 10kV 側高壓斷路器的最大長期工作電流計算如下： .......................................15 農(nóng)村 35kV 無人值守變電所設計 IV 低壓側電流互感器的選擇及校驗 .....................................................