機(jī)械廠變電所的電氣設(shè)計(jì)畢業(yè)設(shè)計(jì)-免費(fèi)閱讀
【正文】 致謝本次畢業(yè)設(shè)計(jì)的完成，首先要感謝我的母校及其各位老師對(duì)我的培養(yǎng)，沒有他們的教導(dǎo)我是不可能完成畢業(yè)設(shè)計(jì)的。通過上機(jī)，我對(duì)word、auto考慮到周圍環(huán)境和進(jìn)出線方便，決定在6號(hào)廠房的西側(cè)僅靠廠房建造工廠變電所，器型為附設(shè)式。這時(shí)變電所低壓側(cè)的功率因數(shù)為：cosφ=補(bǔ)償后：由于電力系統(tǒng)的發(fā)展，則取cosφ’=，低壓側(cè)需要裝設(shè)的并聯(lián)電容器容量為： QC=（－ ） = kvar S30’= kVA因此，主變壓器容量可改選為800 kVA，比補(bǔ)償前容量減少450 kVA。 全廠負(fù)荷計(jì)算本設(shè)計(jì)采用需要系數(shù)法確定。計(jì)算負(fù)荷又稱需要負(fù)荷或最大負(fù)荷。計(jì)算負(fù)荷是供電設(shè)計(jì)計(jì)算的基本依據(jù)。在電子式靜態(tài)保護(hù)裝置和數(shù)字式保護(hù)裝置出現(xiàn)以后，雖然繼電器以被電子元件或計(jì)算機(jī)所代替，但仍沿用此名稱。全所停電后，將引起區(qū)域電網(wǎng)解列。政企分開，省為實(shí)體，聯(lián)合電網(wǎng)，統(tǒng)一調(diào)度，集資辦電。因此，對(duì)這種車間變電所的設(shè)計(jì)技術(shù)經(jīng)濟(jì)指標(biāo)要求比較高。關(guān)鍵詞：變電所，設(shè)計(jì)，選擇，安全The Electrical Design of The Mechanical Plant Substation Author:Shi wei Tutor:Mu Guo HuaAbstractThis article describes the electrical design of the mechanical plant substation. The choice of the substation site, the choice of the main wiring , high voltage equipment selection, load calculations, short circuit current calculations, various relay’s selection and lightning protection systems are instructed. In particular, this paper gave a detailed description and analysis to the choice of the main wiring , the choice of the transformer and short circuit current calculations. The main connection of the substation, the protection device of high voltage and low voltage side are unfolded through the CAD drawing.Searching a lot of relevant information and visiting many factories, the design contents is closer to reality. This paper designs lightning protection and grounding. This allows the substation to avoid lightning and to ensure the safety of the substation. It can protects the power equipment and prevents the hazards of the overcurrent. And it ensures that the substation has a stable output voltage. The design uses two main transformers. The prinary side using a single bus. The secondaly side using a segmented single busbar. This wiring scheme ensures the reliability of electricity supply, it’s flexible and convenient ,and it adapt to the development of load. At the same time,it makes the economy is better, reduces the consumption of investment and nonferrous metals.Key word: Transformer substation, design, choice, safety目錄1 緒論 1 課題背景 1 1 1 22 負(fù)荷計(jì)算和無功功率補(bǔ)償 4 負(fù)荷計(jì)算的目的、意義及原則 4 負(fù)荷計(jì)算方法 4 全廠負(fù)荷計(jì)算 5 無功功率補(bǔ)償 93 變電所位置和形式的選擇 11 11 變電所形式的選擇 11 變電所位置和形式的確定 124 變壓器的選擇 14 主變壓器臺(tái)數(shù)的確定 14 主變壓器容量的確定 145 電氣主接線的設(shè)計(jì) 15 電氣主接線的概述 15
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