共63頁，字?jǐn)?shù)總計(jì)：21924
摘要
電力變壓器是電力系統(tǒng)中的一種重要設(shè)備，其發(fā)展趨勢是提高可靠性、節(jié)省材料、低損耗水平，明顯縮短產(chǎn)品的設(shè)計(jì)周期、降低生產(chǎn)成本和提高產(chǎn)品的質(zhì)量，從而增強(qiáng)產(chǎn)品的市場競爭力，取得顯著的社會(huì)經(jīng)濟(jì)效益，因此電力變壓器的電磁計(jì)算就顯得尤為重要。
本文在參考大量文獻(xiàn)的基礎(chǔ)上，分析了我國電力變壓器行業(yè)的現(xiàn)狀和發(fā)展趨勢，闡述了電力變壓器的基本原理和基本結(jié)構(gòu)特征，根據(jù)電力變壓器設(shè)計(jì)的基本思路，按照目前變壓器設(shè)計(jì)的一般方法，完成了一臺(tái)40000kVA/110kV有載調(diào)壓電力變壓器的計(jì)算工作，主要內(nèi)容包括阻抗電壓、空載、負(fù)載損耗、溫升、短路電動(dòng)力等的計(jì)算。電磁計(jì)算結(jié)果滿足國家標(biāo)準(zhǔn)和技術(shù)參數(shù)的要求。本文還針對電力變壓器的空載損耗、負(fù)載損耗、噪音、溫升、局放、滲漏及抗短能力，介紹了如何改進(jìn)變壓器的結(jié)構(gòu)以降低空載損耗和負(fù)載損耗、噪音、局放及提高抗短路能力，并達(dá)到防滲漏的效果。

關(guān)鍵詞 電力變壓器；電磁計(jì)算；結(jié)構(gòu)改進(jìn)
The Structure and Electromagnetical Calculation of 110kV Power Transformer
Abstract
The further development of power transformer, which is an important equipment in power system, is to improve the liability, save material and reduce loss, obviously shorten product design period, reduce the cost, improve product quality, strengthen the market competitiveness and gain distinct economic performance. Therefore, the electromagnetical calculation of power transformer is especially important.
Based on the information and extensive literature, this article analyzes the present basic principle and basic structure of power transformer, and also, the present situation and the development of our country’s power transformer industry. According to the general designing method and the basic designing ideas of power transformer, a whole electromagnetic calculation of a 40000kVA/110kV OLTC power transformer has been completed in the article. The results of the electromagnetic calculation meet the requirements of national standards and technical parameters, including the main contents of impedance voltage, load and no-load loss, temperature rise, short-circuit electromagnetical force and so on. As development of Chinese transformer manufacture technology, the manufacture technique of 110kV domestic power transformer is being close to or reach to the advanced level of foreign transformer. This article introduces how to improve the structure of the transformer in order to reduce no-load loss, load loss, noise, PD, the magnetic leakage and to improve the anti-short-circuit capacity.
Keywords power transformer; electromagnetic calculation; structure improvement
目錄
摘要 I
Abstract II

第1章 緒論 3
1.1 課題背景 3
1.1.1 課題的國內(nèi)外研究現(xiàn)狀與趨勢 3
1.2 變壓器的工作原理與結(jié)構(gòu) 4
1.2.1 變壓器的基本工作原理 4
1.2.2 電力變壓器基本結(jié)構(gòu) 5
第2章 電力變壓器電磁計(jì)算 8
2.1 技術(shù)條件： 8
2.2 額定電壓和電流的計(jì)算 8
2.2.1 高、低壓線圈額定電壓計(jì)算 8
2.2.2 高低壓線圈電流計(jì)算 8
2.3 鐵芯主要尺寸的確定 9
2.3.1 鐵芯直徑選擇 9
2.3.2 鐵芯截面積計(jì)算 9
2.4 線圈匝數(shù)計(jì)算 10
2.4.1 初選每匝電壓 10
2.4.2 低壓線圈匝數(shù)確定 11
2.4.3 高壓線圈匝數(shù)確定 11
2.4.4 電壓比校核 11
2.5 線圈幾何尺寸的計(jì)算 13
2.5.1 導(dǎo)線選取 13
2.5.2 線段排列 14
2.5.3 線圈高度計(jì)算 15
2.5.4 線圈輻向?qū)挾?15
2.5.5 絕緣半徑及窗高 16
2.5.6 導(dǎo)線長度 16
2.5.7 線圈直流電阻 17
2.5.8 導(dǎo)線重量計(jì)算 17
2.6 阻抗電壓計(jì)算 18
2.6.1 額定分接阻抗電壓 18
2.6.2 最大分接的阻抗電壓 20
2.6.3 最小分接阻抗電壓 22
2.7 負(fù)載損耗和空載損耗 23
2.7.1 負(fù)載損耗 23
2.7.2 鐵芯柱與鐵軛重量： 24
2.8 溫升計(jì)算 25
2.8.1 高壓線圈溫升 25
2.8.2 低壓線圈溫升 26
2.8.3 油對空氣溫升 27
2.8.4 油箱尺寸 29
2.9 變壓器短路電動(dòng)力計(jì)算 29
2.9.1 安匝平衡計(jì)算： 29
2.9.2 短路時(shí)繞組導(dǎo)線上應(yīng)力計(jì)算 31
2.10 變壓器重量計(jì)算 33
2.10.1 油重量計(jì)算 33
2.10.2 器身重 35
2.10.3 油箱重量 35
2.10.4 附件重 35
2.10.5 變壓器總重： 36
2.11 電磁計(jì)算的小結(jié) 36
第3章 變壓器結(jié)構(gòu)改進(jìn) 37
3.1 變壓器結(jié)構(gòu)改進(jìn)措施 37
3.2 本章小結(jié) 40
結(jié)論 41
致謝 42
參考文獻(xiàn) 43
附錄 44