摘 要
一間冶金工業(yè)廠如果對(duì)變配電系統(tǒng)進(jìn)行一個(gè)完善的規(guī)劃，能很好地節(jié)約資金、合理規(guī)劃用地、降低電能損耗、提高電壓質(zhì)量、保證系統(tǒng)的正常運(yùn)行。本論文對(duì)變配電進(jìn)行全面的設(shè)計(jì)，內(nèi)容分四大部分。
第一部分先從論文的背景和目的進(jìn)行闡述，然后對(duì)原始資料來(lái)進(jìn)行初步的分析，再確定好本論文的設(shè)計(jì)步驟。第二部分確定好冶金工業(yè)廠各部分的負(fù)荷，進(jìn)行精確的計(jì)算，通過(guò)無(wú)功補(bǔ)償來(lái)提高系統(tǒng)的功率因數(shù)減少電能的損耗。根據(jù)負(fù)荷的重要性和負(fù)荷的大小進(jìn)行初步的變壓器選擇和合理的主接線、供電線路的設(shè)計(jì)。第三部分主要是確保系統(tǒng)的安全，首先對(duì)系統(tǒng)進(jìn)行精確的短路計(jì)算，然后根據(jù)所得到的短路電流和沖擊電流進(jìn)行一系列的高低壓設(shè)備的選擇與校驗(yàn)，保證系統(tǒng)的正常運(yùn)行。第四部分根據(jù)設(shè)計(jì)的要求，最后進(jìn)行防雷保護(hù)措施的選擇和接地裝置的設(shè)計(jì)，增加系統(tǒng)的安全性。
在論文的最后還附上設(shè)計(jì)的圖紙和計(jì)算過(guò)程。

關(guān)鍵詞：負(fù)荷計(jì)算、主接線設(shè)計(jì)、短路計(jì)算、配電裝置

Abstract
A Metallurgical Machinery factory if the transmission and distribution system have a sound planning, savings can be good, reasonable land use planning, reducing power loss, upgrade quality and ensure the normal operation of systems. In this paper, transmission and distribution of a comprehensive design, content is divided into four parts.
The first part discussed the background and purpose, then the raw data to conduct a preliminary analysis, to determine a good step in the design of this thesis. The second part of the metallurgical have plant to identify good part of the load, an accurate calculation, through the reactive power compensation system to improve the power factor to reduce the power loss. According to load the importance and the size of a reasonable load the main cables, power supply lines and preliminary design of the transformer choice. The third part is to ensure that the safety system, first of all, the system accurate short-circuit, and then be the basis of the current short-circuit current and impact of a series of high and low voltage equipment selection and validation to ensure the normal operation of systems. The fourth part of the design in accordance with the requirements of lightning protection measures for the final selection and ground equipment design, increased system security.
In the final papers also include the design drawings and calculation process.

Key words：Load calculation、Main wiring design、Short-circuit calculation 、Distribution Device

目 錄
1 緒 論 1
1.1 論文背景及目的 1
1.2 論文研究方法 1
1.3 供電設(shè)計(jì)的主要內(nèi)容 1
2 負(fù)荷計(jì)算與無(wú)功功率補(bǔ)償 2
2.1 負(fù)荷計(jì)算 2
2.1.1 負(fù)荷計(jì)算的意義 2
2.1.2 按需要系數(shù)法確定計(jì)算負(fù)荷 2
2.1.3 6kV負(fù)荷計(jì)算 3
2.1.4 NO.1~NO.5變電所380V負(fù)荷計(jì)算 3
2.2 無(wú)功補(bǔ)償計(jì)算 4
2.2.1 確定補(bǔ)償容量 4
2.2.2 補(bǔ)償后的功率因素 6
3 變壓器選擇與主接線方案的設(shè)計(jì) 8
3.1 選擇降壓變壓器 8
3.1.1 35kV/6kV變壓器的選擇 8
3.1.2 6kV/380V變壓器的選擇 9
3.2 工廠主接線方案的比較 10
3.2.1 工廠總降壓變電所高壓側(cè)主接線方式比較 10
3.2.2 工廠總降壓變電所低壓側(cè)主接線方式比較 10
3.2.3 工廠總降壓變電所供配電電壓的選擇 11
3.3 總降壓變電所電氣主接線設(shè)計(jì) 11
3.4 高低壓配電柜選擇 11
4 短路電流計(jì)算 13
4.1 短路計(jì)算的意義 13
4.2 短路計(jì)算 13
5 電氣設(shè)備選擇 15
5.1 電氣設(shè)備選擇與校驗(yàn)的條件與項(xiàng)目 15
5.2 設(shè)備選擇 15
5.2.1 斷路器的選擇 15
5.2.2 隔離開關(guān)的選擇 17
5.2.3 高壓熔斷器選擇 18
5.2.4 電壓互感器的選擇 19
5.2.5 電流互感器的選擇 20
5.3 母線與各電壓等級(jí)出線選擇 23
5.3.1 6kV母線的選擇 23
5.3.2 選擇35kV線路導(dǎo)線 25
5.3.3 6kV出線的選擇 26
6 繼電保護(hù)選擇與整定 32
6.1 35kV側(cè)電壓互感器二次回路方案與繼電保護(hù)的整定 32
6.1.1 35kV主變壓器保護(hù) 32
6.1.2 6kV變壓器保護(hù) 35
6.1.3 6kV母線保護(hù) 36
6.1.4 6kV出線保護(hù) 36
7 防雷保護(hù)與接地裝置的設(shè)計(jì) 39
7.1 防雷保護(hù)設(shè)計(jì) 39
7.2 接地裝置設(shè)計(jì) 39
結(jié) 論 41
參 考 文 獻(xiàn) 42
致 謝 43
附錄A 設(shè)計(jì)計(jì)算書 44
附錄B 主接線圖 54