【摘要】：柔性直流輸電換流閥屏蔽系統(tǒng)的表面電場(chǎng)計(jì)算與屏蔽效果分析對(duì)閥塔均壓環(huán)設(shè)計(jì)與表面場(chǎng)強(qiáng)控制具有重要作用,本文使用伽遼金間接邊界元方法首先對(duì)理想化模型屏蔽系統(tǒng)的屏蔽效果進(jìn)行研究,構(gòu)建理想化屏蔽系統(tǒng)模型并分別對(duì)未加均壓環(huán)的閥箱體結(jié)構(gòu)與施加均壓環(huán)的整體結(jié)構(gòu)進(jìn)行表面場(chǎng)強(qiáng)計(jì)算,具體分析了均壓環(huán)的高度、位置、間距對(duì)閥箱體結(jié)構(gòu)表面場(chǎng)強(qiáng)的影響,獲得了一定的規(guī)律；進(jìn)一步對(duì)不同的均壓環(huán)設(shè)計(jì)方案進(jìn)行比較,在滿足約束條件下根據(jù)比較結(jié)果總結(jié)了合適方案,施加合適方案下的均壓環(huán)使閥箱體得到良好屏蔽且均壓環(huán)無起暈現(xiàn)象。比較結(jié)果說明換流閥體結(jié)構(gòu)外部均壓環(huán)之間距離越大,閥箱體結(jié)構(gòu)所對(duì)應(yīng)的棱邊中點(diǎn)場(chǎng)強(qiáng)越大,均壓環(huán)的施加使閥箱體模型對(duì)應(yīng)尖角部位表面場(chǎng)強(qiáng)大幅度減小且均壓環(huán)高度越大,閥箱體尖角部位表面場(chǎng)強(qiáng)越小。本文對(duì)實(shí)際工程中換流閥屏蔽系統(tǒng)的屏蔽效果進(jìn)行詳細(xì)地研究,針對(duì)工程中的絕緣要求分析改變均壓環(huán)的尺寸、間距等參數(shù)后是否滿足屏蔽要求；進(jìn)一步在絕緣設(shè)計(jì)過程中調(diào)整屏蔽系統(tǒng)結(jié)構(gòu),提出了考慮閥體模塊、橫板立柱、法蘭以及球等結(jié)構(gòu)的計(jì)算模型,使計(jì)算更加準(zhǔn)確,計(jì)算結(jié)果表明實(shí)際工程中法蘭表面場(chǎng)強(qiáng)不可忽略,側(cè)面應(yīng)做成光滑曲面。根據(jù)電壓施加方式,對(duì)實(shí)際閥塔結(jié)構(gòu)分成不同時(shí)刻不同情況建立考慮較為全面的計(jì)算模型,詳細(xì)介紹了每種情況下的建模方式、原理、電壓施加方式并計(jì)算閥塔結(jié)構(gòu)中關(guān)鍵部位的表面電場(chǎng),總結(jié)了規(guī)律并驗(yàn)證了實(shí)際工程中屏蔽系統(tǒng)的絕緣可行性,解決了工程中的絕緣設(shè)計(jì)問題。
[Abstract]:The calculation of the surface electric field and the analysis of the shielding effect of the flexible HVDC converter valve shield system play an important role in the design of the valve tower pressure sharing ring and the control of the surface field intensity. In this paper, Galerkin indirect boundary element method is used to study the shielding effect of the idealized model shielding system. The idealized shielding system model is constructed and the surface field strength of the valve box structure without the uniform pressure ring and the whole structure with the uniform pressure ring applied are calculated respectively. The influence of the height, position and spacing of the uniform pressure ring on the surface field intensity of the valve box structure is analyzed in detail. A certain rule is obtained. Furthermore, the different design schemes of the equalizing ring are compared. According to the comparison results, the suitable scheme is summarized under the constraint condition. The pressure sharing ring under the suitable scheme can make the valve box get good shielding and there is no halo phenomenon in the equalizing pressure ring. The comparison results show that the greater the distance between the outer pressure rings of the commutation valve body is, the greater the field intensity of the center point corresponding to the valve box structure is. The application of the uniform pressure ring reduces the strong amplitude of the surface field of the valve box corresponding to the sharp angle and the greater the height of the uniform pressure ring, the smaller the surface field intensity of the valve box is. In this paper, the shielding effect of commutation valve shielding system in practical engineering is studied in detail. According to the insulation requirements in engineering, whether the parameters such as the size and spacing of the pressure sharing ring can meet the shielding requirements are analyzed. Furthermore, the structure of shield system is adjusted in the process of insulation design, and a calculation model considering the structure of valve body module, transverse plate column, flange and ball is put forward to make the calculation more accurate. The calculation results show that the flange surface field strength can not be ignored and the flange surface should be made into a smooth surface. According to the way of applied voltage, the calculation model of the actual valve tower structure is established and considered in different time and different situation, and the modeling method and principle of each case are introduced in detail. The voltage applied mode and the surface electric field of the key part of the valve tower structure are calculated, the regularity is summarized and the insulation feasibility of the shield system in the actual engineering is verified, and the insulation design problem in the engineering is solved.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM721.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉士利;王澤忠;孫超;;應(yīng)用伽遼金邊界元法的直流換流站屏蔽罩表面場(chǎng)強(qiáng)計(jì)算[J];電網(wǎng)技術(shù);2011年05期

2 田冀煥;周遠(yuǎn)翔;郭紹偉;聶瓊;孫清華;梁曦東;;直流換流站閥廳內(nèi)三維電場(chǎng)的分布式并行計(jì)算[J];高電壓技術(shù);2010年05期

3 張燕秉;鄭勁;汪德華;李文平;;特高壓直流換流變壓器的研制[J];高電壓技術(shù);2010年01期

4 劉兵;阮江軍;韓海宏;余世峰;吳田;;柔性直流輸電系統(tǒng)電磁環(huán)境分析[J];高電壓技術(shù);2009年11期

5 鄧桃;李慶峰;張學(xué)軍;宿志一;范建斌;;±800kV特高壓直流線路均壓環(huán)優(yōu)化研究(英文)[J];中國(guó)電機(jī)工程學(xué)報(bào);2009年22期

6 馬為民;聶定珍;萬(wàn)保權(quán);張小武;謝輝春;李妮;;高壓直流換流站閥廳屏蔽效能的研究[J];高電壓技術(shù);2008年11期

7 陳慶國(guó);張杰;高源;魏新勞;;混合電場(chǎng)作用下?lián)Q流變壓器閥側(cè)繞組電場(chǎng)分析[J];高電壓技術(shù);2008年03期

8 王澤忠;李亞莎;鄧春華;;基于球坐標(biāo)的三維靜電場(chǎng)曲邊四邊形邊界元方法[J];電工技術(shù)學(xué)報(bào);2007年04期

9 王建民;張喜樂;吳增泊;孫優(yōu)良;趙文祥;;高壓直流換流變壓器電磁場(chǎng)特性的數(shù)值應(yīng)用研究[J];變壓器;2007年03期

10 李亞莎;王澤忠;;基于柱坐標(biāo)的三維靜電場(chǎng)曲邊四邊形邊界元法[J];高電壓技術(shù);2007年01期

相關(guān)博士學(xué)位論文 前4條

1 劉士利;改進(jìn)的邊界元法及其在電場(chǎng)計(jì)算中的應(yīng)用[D];華北電力大學(xué)（北京）;2011年

2 陳澤軍;三維彈性接觸Taylor級(jí)數(shù)多極邊界元法理論與應(yīng)用研究[D];燕山大學(xué);2009年

3 李亞莎;高精度快速邊界元法及其在絕緣子電場(chǎng)計(jì)算中應(yīng)用研究[D];華北電力大學(xué)（北京）;2007年

4 周平;電磁散射問題中有限元法和邊界元法及其混合技術(shù)研究[D];南京航空航天大學(xué);2006年

相關(guān)碩士學(xué)位論文 前2條

1 武坤;特高壓直流線路復(fù)合絕緣子均壓環(huán)優(yōu)化研究[D];重慶大學(xué);2008年

2 劉姜玲;合成絕緣子三維電場(chǎng)分區(qū)邊界元法的研究[D];華北電力大學(xué)（北京）;2003年

，

本文編號(hào)：2340504