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高壓配電網(wǎng)設(shè)計（二）
摘要：在近幾年來，隨著電力工業(yè)的不斷發(fā)展，電力網(wǎng)絡(luò)成為電力系統(tǒng)的一個重要組成部分；它主要包括變電站、輸電線路和配電網(wǎng)絡(luò)；它的主要作用是連接發(fā)電廠和用戶，以最小的干擾，在一定的電壓和頻率下最有效最可靠地把電力通過輸電線和配電網(wǎng)傳送給用戶。本設(shè)計采用理論和計算相結(jié)合的方法討論高壓配電網(wǎng)的設(shè)計。首先，根據(jù)負(fù)荷特點(diǎn)和要求來確定供電系統(tǒng)的類型、變壓器的容量、導(dǎo)線截面積等。其次，電力網(wǎng)絡(luò)的典型網(wǎng)絡(luò)結(jié)構(gòu)有環(huán)網(wǎng)、放射型、單端供電型、雙端供電型等形式。我選擇兩種不同的網(wǎng)絡(luò)，之后對之進(jìn)行潮流計算得到各段的功率損耗以及電壓降落。假設(shè)全網(wǎng)電壓為額定電壓，可以得到各用戶端的實際電壓值。在電壓偏移在允許的范圍情況下，對所選的方案進(jìn)行技術(shù)經(jīng)濟(jì)比較，找出一個最佳方案，使之在可靠性和經(jīng)濟(jì)性之間找到最佳平衡點(diǎn)。
關(guān)鍵字： 高壓配電網(wǎng)，功率損耗，電壓降落，允許電壓偏移。

Abstract: In recent years, with the development of the power industry , the power network is one of the important parts of power system. It mainly include substations, transmission lines, and distribution network. It’s function is to connect the generating station to consumers, with the minimum disturbance when transferring this power over transmission lines and a distribution network with the maximum efficiency and reliability for delivery to consumers at a fixed voltage and frequency. This paper discuss the design of the high voltage distribute network with count and theory. At first, we can define the type of distribute network , the capacity of the main transformer, the cross-sections of the lines and so on .Secondly the power network’s the typical feature are loop structure ,radial type, supply fed at one end and supply fed at two ends. I choice two different type of network and find the power loss and voltage drip from the power flow calculation .Pre summer that the all power network voltage is the rated voltage ,we can find the voltage which the consumer acquired. If the service voltage held within allowable voltage deviation, we do the technical economical compared and choice the best plan which have a balance between reliability and economy.
Key word :high voltage distribute network ，power loss , voltage drip , allowable voltage deviation。

目 錄
摘要 …………………………………………………………………………………Ⅰ
Abstract ……………………………………………………………………………Ⅱ
前言 …………………………………………………………………………………Ⅲ
第一部分 設(shè)計說明書 ………………………………………………………………1
1 有功功率的平衡計算 ……………………………………………………………1
2 高壓配電網(wǎng)的電壓等級的選擇 …………………………………………………1
3 變電所主變壓器的選擇……………………………………………………………1
4 導(dǎo)線截面的選擇 …………………………………………………………………2
5 潮流計算……………………………………………………………………………2
5.1 概論…………………………………………………………………………………………2
5.2 計算結(jié)果……………………………………………………………………………………4
6 經(jīng)濟(jì)技術(shù)比較………………………………………………………………………5
7 調(diào)壓計算…………………………………………………………………………………6
8聯(lián)絡(luò)線上的潮流計算………………………………………………………………………6
結(jié)論 ……………………………………………………………………………………………………7
第二部分 計算書………………………………………………………………………8
1.有功功率的平衡計算………………………………………………………………8
2.變電所主變壓器的選擇……………………………………………………………9
3.導(dǎo)線截面的選擇……………………………………………………………………10
3.1 導(dǎo)線選擇……………………………………………………………………………………10
3.2 導(dǎo)線校驗……………………………………………………………………………………12
4潮流計算………………………………………………………………………………13
4.1 方案一………………………………………………………………………………………13
4.2 方案二………………………………………………………………………………………33
5 通過技術(shù)經(jīng)濟(jì)比較確定最佳方案 ………………………………………………46
5.1電網(wǎng)的電能損耗 …………………………………………………………………………46
5.2線路投資 …………………………………………………………………………………47
5.3 變電所投資 ………………………………………………………………………………47
5.4 工程總投資 ………………………………………………………………………………47
5.5計算年運(yùn)行費(fèi)用……………………………………………………………………………47
5.6 計算年最費(fèi)用 ……………………………………………………………………………48
6調(diào)壓計算………………………………………………………………………………………48
6.1 A變電所的調(diào)壓計算…………………………………………………………………48
6.2 B變電所的調(diào)壓計算…………………………………………………………………49
6.3 C變電所的調(diào)壓計算…………………………………………………………………50
6.4 D變電所的調(diào)壓計算…………………………………………………………..