空心電抗器工頻磁場(chǎng)干擾屏蔽措施的研究.pdf

1、華北電力大學(xué)碩士學(xué)位論文摘要變電站中的空心電抗器由于磁場(chǎng)發(fā)散，所以容易對(duì)附近的電子設(shè)備產(chǎn)生電磁干擾，嚴(yán)重時(shí)使設(shè)備無法正常工作。本文主要分析各種屏蔽措施對(duì)屏蔽效果的影響。根據(jù)電磁場(chǎng)原理，用金屬板作為屏蔽材料時(shí)，金屬板中會(huì)產(chǎn)生渦流，從而產(chǎn)生與原磁場(chǎng)相抵消的磁場(chǎng)，達(dá)到磁場(chǎng)屏蔽的目的。本文使用Ansys軟件進(jìn)行工頻干擾屏蔽措施的分析。提出四種可行的屏蔽方案，通過比較各方案的磁場(chǎng)屏蔽，找到滿足要求的屏蔽方案。對(duì)于選定的屏蔽方案，計(jì)算屏蔽板厚度、屏

2、蔽板電導(dǎo)率、相對(duì)磁導(dǎo)率對(duì)磁場(chǎng)屏蔽的影響。尤其對(duì)屏蔽板的連接工藝對(duì)磁場(chǎng)屏蔽的影響進(jìn)行了詳細(xì)的分析，得出了電抗器工頻磁場(chǎng)干擾的規(guī)律，并提出和實(shí)現(xiàn)了屏蔽方案，對(duì)同類變電站的設(shè)計(jì)具有參考價(jià)值。關(guān)鍵詞:空心電抗器，磁場(chǎng)屏蔽，渦流ABSTRACTAireorereaetorinsubstationcaneauseeleetromagnetieinterfereneetoeleetronieequiPment，fithasseriousmagneti

3、cfielddivergenee.50itmaketheeleetronieequiPmenteannotwork.Theshieldingeffeetivenessofdifi七rentshieldingmeasuresareanalyZedinthisPaPer.Aecordingtothemagnetictheory，there15eddyeurrentgeneratedinmetalPlatewhenit15usedasthes

4、hieldmaterial.Ansys15usedinPowerfrequeneymagnetiefieldshieldingmeasuresanalysis.FourfeasibleshieldingsehemesareProPosed.ByeomParingofthem，theshieldingschemethatmeetsrequiretnentseanbefinallyfound.Theshieldingeffeetivenes

5、sofshieldingPlatewithdifferentthicbess，differenteleetriealeonduetivityanddifferentialPermeabilityareanalyzed，espeeiallythebondingteehnolo盯ofshieldingPlates.TherulesofPowerfrequeneymagnetiefieldinterfereneeareobtained.Shi

6、eldingscheme15exeeuted.Andtheyarerefereneefsimilarsubstationdesign.Yangleijuan.(Electricalengineelingtheynewteehnology)DireetedbyProf.Wangzezhong…KEYWORDS:AircoreReaeto嘰MagnetieShielding，EddyCurrent華北電力大學(xué)碩十學(xué)位論文4.2.2磁場(chǎng)屏蔽.

7、............................................……214.2.3空間磁場(chǎng)的分布.......................................……224.2.4金屬板內(nèi)渦流分布情況................................……234.3屏蔽金屬板材料對(duì)屏蔽的影響.................................……244.3.1電導(dǎo)率對(duì)屏蔽的影

8、響..................................……244.3.2磁導(dǎo)率對(duì)屏蔽的影響...……，........................……254.3.3鋁、銅、鐵三種材料屏蔽的綜合比較....................……264.4屏蔽金屬板厚度對(duì)屏蔽的影響.................................……284.4.1磁場(chǎng)屏蔽..........................

9、...................……284.4.2金屬板內(nèi)渦流分布情況................................……314.5屏蔽金屬板接縫連接工藝對(duì)屏蔽的影響.........................……344.5.1金屬板不連接時(shí)對(duì)屏蔽的影響..........................……354.5.2焊接密度對(duì)屏蔽的影響................................……

10、374.5.3焊接與鉚接的差別.....................................……394.5.4焊接點(diǎn)設(shè)置對(duì)屏蔽的影響..............................……414.6屏蔽方案的實(shí)施.............................................……424.7本章小結(jié)...................................……，.........…