某住宅小區(qū)供配電系統(tǒng)設(shè)計(jì)

電氣工程論文編號(hào):DQ162   論文字?jǐn)?shù):18181,頁數(shù):44

目 錄
摘要…………………………………………………………………………………………………...…………..Ⅱ
1 緒論……………………………………………………………………………………………..1
 1.1 概述……………………………………..……………….……...………………..….……1
 1.2 設(shè)計(jì)意義……………………………………..…….………………………….…….........1
 1.3 設(shè)計(jì)內(nèi)容…………………………………………...…………………………………..…1
 1.4 研究的方法與技術(shù)路線…………………………………...………..……………………2
  1.4.1研究方法……………………………………….…………………………….…….2
  1.4.2技術(shù)路線………………………………………….………………….…………….2
2 設(shè)計(jì)原始資料………………………………...…..…………………..…..…………………...3
 2.1 工程概況………………………………...……………...………………………..….……3
 2.2 負(fù)荷統(tǒng)計(jì)表………………………………...…………...……………………….……......3
 2.3 供用電協(xié)議………………………………...…………..…………………………………4
 2.4 水文氣象條件…………………………………...…………..……………………………4
3 供電系統(tǒng)負(fù)荷統(tǒng)計(jì)………………………………………...………………………………...5
 3.1 供配電系統(tǒng)設(shè)計(jì)的規(guī)范要點(diǎn)………………………………...……...…………..….……5
 3.2 電力負(fù)荷的分類和分級(jí)…………………………………………...…...……….……......5
  3.2.1一級(jí)負(fù)荷……………………………………………………...……………………5
  3.2.2二級(jí)負(fù)荷……………………………………………………….…………………..5
  3.2.3三級(jí)負(fù)荷……………………………………………………….…………………..5
  3.2.4負(fù)荷統(tǒng)計(jì)……………………………………………………….…………………..5
 3.3 負(fù)荷計(jì)算方法的選擇及其計(jì)算…………………………………………...………......…6
  3.3.1負(fù)荷計(jì)算方法的選擇……………………………………………….……………..6
  3.3.2負(fù)荷計(jì)算所需公式………………………………………………….……………..6
  3.3.3各級(jí)負(fù)荷的計(jì)算…………………………………………………….……………..8
 3.4 計(jì)算負(fù)荷的校驗(yàn)………………………………………………………………...………10
4 變壓器的選擇……………………………………………………………...………………...11
 4.1 變壓器類型的選擇………………………………...…………………………...….……11
 4.2 變壓器臺(tái)數(shù)與容量選擇…………………………………...………………….….…......11
  4.2.1變壓器臺(tái)數(shù)選擇原理…………………………….…...………………………….11
  4.2.2變壓器臺(tái)數(shù)的選擇……………………………………………….……………....12
  4.2.3變壓器容量選擇的基本原理…………………………………….……………....12
  4.2.4變壓器容量…………………………………………………….………………....12
 4.3 無功功率補(bǔ)償裝置的選擇…………………………...…………………………………13
 4.4 10kV側(cè)的功率損耗………………………………………………………..……………14
  4.4.1變壓器功率損耗……………………………………….…………………..……..14
  4.4.2電纜的功率損耗……………………………………….…………………………15
5 系統(tǒng)主接線及饋電回路分布方式…………...…………………………………………..17
 5.1 系統(tǒng)主接線………………………………………………………………...……………17
 5.2 變饋電回路分布………………………………………………………………...………18
6 短路電流計(jì)算……………………………………………………………………….….……19
 6.1 短路電流計(jì)算方法的選擇………………………………………...……………………19
 6.2 短路電流計(jì)算…………………………………………………………...………………19
 6.2.1兩臺(tái)變壓器分列運(yùn)行情況下的短路電流………………………….……..……..20
 6.2.2兩臺(tái)變壓器并聯(lián)運(yùn)行情況下的短路電流………………………….……...…….22
7 高低壓設(shè)備的選擇及校驗(yàn)………………………………………………………………...24
 7.1 高壓設(shè)備選擇的原則…………………………………...………………………………24
 7.2 低壓電器選擇的原則………………………………………...…………………………24
 7.3 高壓開關(guān)柜的型號(hào)選擇…………………………………………...……………………24
 7.3.1高壓進(jìn)線開關(guān)柜的選擇……………………………………….…………………25
 7.3.2高壓出線開關(guān)柜的選擇………………………………………….……………....25
 7.4 各部分高壓開關(guān)的選擇與校驗(yàn)……………………………………………...…………26
 7.4.110kV側(cè)進(jìn)線開關(guān)柜設(shè)備的選擇與校驗(yàn)………………………………………….26
 7.4.210kV側(cè)出線開關(guān)柜設(shè)備的選擇與校驗(yàn)……………………………………….....27
 7.5 380V低壓開關(guān)柜的選擇………………………………………………….….................27
 7.6 380V低壓開關(guān)柜設(shè)備的選擇與校驗(yàn)…………………………………………………..28
 7.7 各部分導(dǎo)線和電纜截面的選擇與校驗(yàn)……………………………………...…………28
 7.7.110kV高壓架空線的選擇與校驗(yàn)……………………………………………….....28
 7.7.210kV高壓電纜的選擇與校驗(yàn)…………………………………………..………...29
 7.7.310kV側(cè)高壓母線的選擇與校驗(yàn)……………………………………..…………...30
 7.7.4380V側(cè)低壓母線的選擇與校驗(yàn)…………………………………..……………...31
8 繼電保護(hù)……………………………………………………………………………………...32
 8.1 10kV架空線路保護(hù)裝設(shè)原則………………………………………………………...…32
 8.2 整定保護(hù)計(jì)算與繼電器的選擇……………………………….......……………………32
9 防雷與接地保護(hù)………………………………………………...……………...…………...34
 9.1 防雷保護(hù)………………………………………………………………………...………34
 9.2 變電所公共接地裝置的設(shè)計(jì)………………………………………………………...…35
 9.2.1接地電阻的要求……………………………………………………………….....35
 9.2.2接地裝置的設(shè)計(jì)………………………………………………………………….35
 9.2.3校驗(yàn)接地裝置的短路熱效應(yīng)………………………………………………….....36
10 總結(jié)……………………………………………………………………………………..……37
致謝………………………………………………………………………………………….........38
參考文獻(xiàn)………………………………………………………………………………………...39

摘  要
 隨著人類社會(huì)的進(jìn)步與發(fā)展，社會(huì)生活逐漸向機(jī)械化智能化發(fā)展，隨之帶來的能源需求也越發(fā)增大，尤其是電力能源的需求已經(jīng)成為生活工作中無法忽視的關(guān)鍵因素。電力是應(yīng)用最廣泛、最方便、最清潔的一種二次能源。當(dāng)今常規(guī)電力主要是由一次能源，以及水能、核能、風(fēng)能、地?zé)崮堋⑻�陽能、海洋能等新能源和可再生能源通過發(fā)電設(shè)備轉(zhuǎn)換而成，再經(jīng)過傳輸、變電和配電系統(tǒng)送達(dá)用戶消費(fèi)。電力工業(yè)屬于公共事業(yè)，是國民經(jīng)濟(jì)重要的基礎(chǔ)產(chǎn)業(yè)。
 目前，小區(qū)式的住宅方式已經(jīng)在城市中得到普及，電能的安全穩(wěn)定供應(yīng)成為人們工作生活得以正常持續(xù)的基礎(chǔ)，因此供配電系統(tǒng)設(shè)計(jì)，應(yīng)著眼于安全、可靠、優(yōu)質(zhì)、經(jīng)濟(jì)的基本要求，立足于節(jié)能、低碳和可持續(xù)發(fā)展的理念，符合人們高品質(zhì)的物質(zhì)文化需求。
 本設(shè)計(jì)首先對(duì)該住宅小區(qū)進(jìn)行負(fù)荷計(jì)算，選擇相應(yīng)的變壓器臺(tái)數(shù)和容量，從而確定其具體的供電系統(tǒng)。再對(duì)其初選的系統(tǒng)進(jìn)行相應(yīng)的短路計(jì)算和高低壓設(shè)備的選擇及校驗(yàn)，選擇和校驗(yàn)高低壓線路，簡(jiǎn)單地進(jìn)行繼電保護(hù)和接地防雷保護(hù)設(shè)置的說明。最后得出具體的該住宅小區(qū)供電系統(tǒng)的線路圖。

關(guān)鍵詞：供配電；負(fù)荷計(jì)算；變壓器；短路電流；開關(guān)柜

Abstract
With the progress and development of human society, social activities are developing into mechanization and intelligence gradually. So the energy demands are increasing, especially the demand of the electrical energy which has already been the critical factors in our daily life. Electric power is one of the easiest, cleanest and the most widely used secondary energy source. Today the conventional power is converted from the primary energy, renewable energy and new energy, such as water power, nuclear energy, wind energy, geothermal energy, solar energy and ocean energy through the generating equipments, then it can be consumed through the system of electricity transmission, electricity transformation and power distribution. Electric power industry belongs to the public utility. It is an important basic industry in the national economy.
Recently, the residential area is very common in cities. The safety supply of electrical power should be the foundation of normal work life. Thus the power supply system design should be focused on the safety, the economy, the high quality and reliability, based on the ideas of energy-saving, low carbon and sustainable development, and conformed to the high-quality material and cultural needs.
Firstly, this design load calculates the residence community, then chooses the sets and the capacity of the transformers appropriately, thereby that specific power supply system can be ensured. Secondly the first system is short circuit calculated, and then the high-voltage device and lines are chosen and calibrated, also the relay protection and the grounding lightning protection setting will be stated simply. Finally the specific power supply system wiring diagram will be reached.

Keywords：power supply；load calculation；transformers；short circuit calculate；switch cabinet