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樓宇低壓配電系統(tǒng)的設(shè)計(jì)-展示頁

2025-07-09 15:48本頁面
  

【正文】 ge Distribution SystemAbstractThe main building is a lowvoltage distribution system a variety of high and low voltage power distribution equipment (or ponents) and power distribution station portfolio, transform the voltage of a power system distribution of electric energy directly to electrical equipment of buildings, the main contents of the line the 1OkV buck stepdown substation high voltage of 380V by low pressure. The design is mainly carried load calculation and short circuit calculation back through the data collected to determine the number of units and the main transformer models, draw out the main wiring diagram, substation to select high and low voltage equipment, also carried out the necessary reactive power pensation and calibration of equipment, the final profile is based substation to install the secondary circuit power, the central signaling systems, lightning protection and grounding protection.The first chapter mainly writes the building design of low voltage power distribution system, introduces the background, significance and application of environmental.The second chapter mainly writes how the putational load, the use of demand coefficient method to get the total load, in order to save electricity of power pensation.The third chapter mainly writes how selection of transformer, selected according to the load size, nature, level.The fourth chapter mainly writes the main wiring way and the design main wiring for the building drawings.Objective and methods of the fifth chapter wrote the cause of the short circuit, the harm and the short circuit calculation.The sixth chapter mainly wrote to selection of electrical equipment according to the load calculation and short circuit calculation results.The seventh chapter mainly wrote why relay protection and the type of relay protection.The eighth chapter mainly wrote what is the operating power supply circuit two times and why the need for central signal device.The ninth chapter introduces the substation lightning protection and groundingKeywords: building。 Substation 目 錄1 緒 論 1 樓宇低壓配電系統(tǒng)的設(shè)計(jì)背景 1 樓宇低壓配電系統(tǒng)的設(shè)計(jì)介紹 1 樓宇低壓配電系統(tǒng)的設(shè)計(jì)環(huán)境 1 本設(shè)計(jì)的意義及應(yīng)用 12 負(fù)荷計(jì)算及功率補(bǔ)償 3 負(fù)荷計(jì)算的方法 3 功率補(bǔ)償 63 變壓器選型 8 變壓器臺數(shù)的確定 8 變壓器容量及型號確定 84 主接線 10 單母線分段接線 10 內(nèi)橋式接線 105 短路計(jì)算 12 短路的原因及危害 12 短路計(jì)算的目的及方法 12 短路電流的計(jì)算 13 最大運(yùn)行方式 13 最小運(yùn)行方式 15 短路電流計(jì)算結(jié)果 166 電氣設(shè)備選擇 17 導(dǎo)線、電纜的選擇 17 高壓斷路器 19 高壓隔離開關(guān) 19 高壓熔斷器 20 電流互感器 21 電壓互感器 21 高壓開關(guān)柜 21 母線、支柱絕緣子和穿墻套管 21 低壓斷路器 24 低壓熔斷器 247 繼電保護(hù) 258 配電站二次回路的操作電源和中央信號系統(tǒng) 26 二次回路的操作電源 26 中央信號裝置 269 防雷與接地 27 防雷 27 接地 2710 總結(jié)與展望 30參考文獻(xiàn) 31附錄1 樓宇低壓配電系統(tǒng)主接線圖 32致 謝 33V1 緒 論 隨著樓宇低壓配電系統(tǒng)需求不斷增多,配電系統(tǒng)設(shè)計(jì)已經(jīng)在我國悄然興起,是國家電網(wǎng)建設(shè)中不可缺少的一部分。所以,為了社會經(jīng)濟(jì)的進(jìn)步,我國開始建設(shè)和改造可以節(jié)地、節(jié)電、緊湊型、小型化、無人值守的城鄉(xiāng)電網(wǎng)。由于現(xiàn)在的住宅小區(qū)都包括綠地、停車場、花園、消防、以及燈飾等,為了豐富小區(qū)的內(nèi)涵,達(dá)到和諧統(tǒng)一,要求設(shè)計(jì)信息化、網(wǎng)絡(luò)化和智能、箱變安全可靠、配電技術(shù)先進(jìn)、經(jīng)濟(jì)合理、安全適用以及確保設(shè)計(jì)質(zhì)量。本次設(shè)計(jì)主要是為樓宇設(shè)計(jì)一個(gè)低壓配電系統(tǒng),其主要內(nèi)容就是如何從10kV降壓到380V的過程。 樓宇低壓配電系統(tǒng)的設(shè)計(jì)環(huán)境本設(shè)計(jì)為公寓住宅小區(qū),由10棟9層住宅組成,分為1號住宅樓高9層,2號住宅樓樓高9層,3號住宅樓樓高9層,4號住宅樓樓高9層,5號住宅樓高10層。 本設(shè)計(jì)的意義及應(yīng)用電力是人們生活中不可缺少的東西,生活中離不開它,缺少它既會影響人們的生活狀況,又會影響經(jīng)濟(jì)的發(fā)展,所以樓宇低壓配電系統(tǒng)是一項(xiàng)非常重要的工程。本設(shè)計(jì)的低壓配電系統(tǒng)將應(yīng)用于樓宇小區(qū)的配電系統(tǒng)中,使電能分配給每家每戶;也可以作為其他地方配電系統(tǒng)的參照。用電設(shè)備或用電設(shè)備組多采用需要系數(shù)法或二項(xiàng)式法。本設(shè)計(jì)根據(jù)需要系數(shù)法來計(jì)算:要用到的公式: 有功功率: (21) 無功功率: (22) 視在功率: (23) 總電流: (24)主要的負(fù)荷計(jì)算(1)主要通道及樓梯照明用電計(jì)算1) 地下一層有40盞LED節(jié)能燈40W,10盞紅外線感應(yīng)燈管15WPn=4040+1015=COSФ= Kd=Pc=kdPn==Qc=PctanФ==2) 地下一層應(yīng)急照明燈有80盞熒光燈40W,30盞應(yīng)急燈20WPn=8040+3010= COSФ= Kd= Pc=KdPn==2. 8kWQc=PctanФ==3) 1~9層通道樓梯有9盞吸頂燈30W,9盞壁燈15W,共有10棟Pn=(930+915)10=COSФ= Kd=Pc=KdPn==Qc=PctanФ==4) 總的負(fù)荷Pn總=++=Pc總=++=Qc總=++=(2)電梯用電小區(qū)有10棟樓,共有10臺電梯,選20kW的電梯:Pn=1020=200kWCOSФ= Kd=Pc=KdPn=200=140kWQc=PctanФ=200=260kvarPc總=Pc=140kWQc總=Qc=260kvar(3)排污泵、生活水泵用電1)10棟樓共有20臺生活水泵11kW,5臺備用水泵5kWPn=1
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