【正文】 內(nèi)容提要深入分析研究目前在接地工程中主要采用的降阻措施以及它們的作用，適用場所和應(yīng)該注意的問題，如外延接地，深井接地，接地降阻劑，水下地網(wǎng)和自然接地體的利用。采用技術(shù)經(jīng)濟(jì)的分析方法，具體工程，具體對待，在保證設(shè)備和人身安全的前提下，結(jié)合地質(zhì)，地勢情況，土壤電阻率分布以及具體的工程要求，確定合理的措施和方法達(dá)到接地網(wǎng)降阻的目的。關(guān)鍵詞：降阻劑；短路電流；接地電阻；接地網(wǎng)SummaryIndepth analysis in engineering research is currently in the mainly adopts the grounding resistance reduction measures and their function, application places and should pay attention to the problems, such as grounding, deep well grounding, extensional grounding resistance reduction agent, underwater earth work and the use of natural grounding body. Using technology and economic analysis method, the concrete engineering, specific treat, ensure equipment and personal safety, bining with the premise, geology, the topography soil resistivity distribution and specific engineering requirements, the determination of reasonable measures and methods to achieve the purpose of ground introducing dray reduction.Keywords: drop photoresist。 Shortcircuit current。 Grounding resistance。 Ground introducing目 錄內(nèi)容提要 .............................................................................................................ⅠSummary............................................................................................................Ⅱ第一部分 設(shè)計(jì)說明書1 原始資料 ...........................................................................................................12 變壓器選擇 .......................................................................................................3 主變壓器選擇 ................................................................................................3 站用變壓器選擇 ............................................................................................63 電氣主接線設(shè)計(jì) ...............................................................................................7 主接線設(shè)計(jì)的原則和要求 ............................................................................7 主接線基本接線方式 ....................................................................................8 主接線設(shè)計(jì)步驟 ............................................................................................9 本站主接線設(shè)計(jì)方案 ..................................................................................124 路電流計(jì)算短 .................................................................................................13 短路電流計(jì)算概述 ......................................................................................13 常見短路電流計(jì)算 ......................................................................................15 短路電流計(jì)算結(jié)果 ......................................................................................175 高壓電器設(shè)備選擇 .........................................................................................18 電氣設(shè)別選擇一般條件 ..............................................................................18 高壓斷路器的選擇 ......................................................................................19 隔離開關(guān)的選擇 ..........................................................................................20 互感器的選擇 ..............................................................................................21 絕緣子的選擇. .............................................................................................21 母線的選擇 ..................................................................................................236 配電裝置設(shè)計(jì) .................................................................................................247 防雷保護(hù)設(shè)計(jì) .................................................................................................25第二部分 設(shè)計(jì)計(jì)算書8 負(fù)荷計(jì)算 .........................................................................................................26 主變壓器負(fù)荷計(jì)算 ......................................................................................26 站用 變壓器負(fù)荷計(jì)算 ..................................................................................279 短路電流計(jì)算 .................................................................................................28 短路電流標(biāo)幺值的計(jì) 算 ..............................................................................28 短路電流有名值的計(jì)算 ..............................................................................3510 電氣設(shè)備選擇及校驗(yàn)計(jì)算 ...........................................................................38 高壓斷路器選擇及校驗(yàn) 計(jì)算 ....................................................................40 隔離開關(guān)選擇及校驗(yàn)計(jì)算 ........................................................................41 互感器選擇及校驗(yàn)計(jì)算 ............................................................................42 支持絕緣子選擇及校驗(yàn)計(jì)算. ...................................................................43 母線選擇及校驗(yàn)計(jì)算 ................................................................................4611 防雷保護(hù)計(jì)算 ...............................................................................................47結(jié)論 .....................................................................................................................48參考文獻(xiàn) .............................................................................................................49附錄 .....................................................................................................................50致謝 .....................................................................................................................51第一部分 設(shè)計(jì)說明書1 原始資料（1）建站的必要性：為適應(yīng)某縣區(qū)經(jīng)濟(jì)發(fā)展的需要，滿足電力用戶需求，優(yōu)化電網(wǎng)結(jié)構(gòu)，擬建一座 110kV 變電站。（2）本站電壓等級：110/35/10kV（3）系統(tǒng)接入方案及電源情況： 0kV火 電 廠 系 統(tǒng) 變10kV35系 統(tǒng) 變待 建 圖 系統(tǒng)接入方案電路圖與本所連接的系統(tǒng)電源共有 3 個(gè)，其中 110kV 兩個(gè)，35kV 一個(gè)，如下所示：①110kV 系統(tǒng)變電所：該所電源容量為 200MVA，在該所 110kV 側(cè)母線上的短路容量為634MVA，該所與本站的距離為 ，以一回線路與本所連接。②升壓到母線電壓 110kV 側(cè)火電廠：該廠距離本所 ，裝有 3 臺機(jī)組和兩臺主變，以一回線路與本所連接,該廠裝機(jī)容量和主變參數(shù)如表 所示。 表 火電廠裝機(jī)容量和主變參數(shù)③35kV 系統(tǒng)變電所：該所電源容量視為無限大，在該所 35kV 側(cè)母線上的短路容量為 250MVA，該所與本站的距離為 ，以一回線路與本站連接。裝機(jī)容量參數(shù) 主變壓器參數(shù)325MW cosφ= 260MVA 121/ *?? 17%2??dU6%32???dU（4）本站相關(guān)負(fù)荷資料:本站 3 個(gè)電源,在正常運(yùn)行時(shí),主要是由①②兩個(gè) 110