電力系統(tǒng)無(wú)功補(bǔ)償-畢業(yè)論文

1、蘭州交通大學(xué)畢業(yè)設(shè)計(jì)（論文）摘要隨著電力系統(tǒng)的發(fā)展，電力系統(tǒng)中如電動(dòng)機(jī)、變壓器等電氣設(shè)備明顯增多，其產(chǎn)生的無(wú)功功率也是越來(lái)越多，無(wú)功功率對(duì)電網(wǎng)產(chǎn)生的影響也日益顯現(xiàn)出來(lái)。本文分析了無(wú)功功率的產(chǎn)生機(jī)理和無(wú)功功率對(duì)電力系統(tǒng)造成的不利影響。無(wú)功功率對(duì)電網(wǎng)有著很大的影響，如增大輸電線路中的電流，造成電能損失；電網(wǎng)節(jié)點(diǎn)電壓偏移，使系統(tǒng)穩(wěn)定度下降，同時(shí)還可能造成電氣設(shè)備運(yùn)行效率下降或使用壽命縮短等。同時(shí)，按照無(wú)功補(bǔ)償技術(shù)的發(fā)展歷程分析、比較了傳統(tǒng)無(wú)功

2、補(bǔ)償裝置和現(xiàn)代無(wú)功補(bǔ)償裝置，傳統(tǒng)無(wú)功補(bǔ)償裝置包括電容器補(bǔ)償裝置和電抗器補(bǔ)償裝置，現(xiàn)代無(wú)功補(bǔ)償裝置有飽和電抗器、晶閘管控制電抗器、晶閘管投切電容器和晶閘管控制變壓器等，最終得出了適合不同補(bǔ)償場(chǎng)合使用的補(bǔ)償裝置。同時(shí)，本文還分析、比較了各種無(wú)功補(bǔ)償方式，主要有變電所集中補(bǔ)償方式、低壓集中補(bǔ)償方式、桿上補(bǔ)償方式、用戶終端分散補(bǔ)償方式等，最終確定了適用于不同供配電網(wǎng)絡(luò)的補(bǔ)償方式。通過(guò)分析某一配電網(wǎng)實(shí)例，選擇恰當(dāng)?shù)臒o(wú)功補(bǔ)償裝置和合適的無(wú)功補(bǔ)償方式

3、對(duì)其進(jìn)行無(wú)功補(bǔ)償，并對(duì)無(wú)功補(bǔ)償結(jié)果進(jìn)行評(píng)價(jià)。關(guān)鍵詞：無(wú)功功率；無(wú)功補(bǔ)償；無(wú)功補(bǔ)裝置；無(wú)功補(bǔ)償方式蘭州交通大學(xué)畢業(yè)設(shè)計(jì)（論文）AbstractWiththedevelopmentofpowersystemmemeelectricalequipmentssuchasmotstransfmerscomeintopowersystemreactivepowerisincreasingdramaticallytheimpactofreactive

4、powerisalsoincreasing.Themechanismofwherethereactivepowercomesfromisanalyzedinthisthesisaswellastheharmfulimpactitmakestopowersystem.Reactivepowerinpowersystemhasagreatimpactonpowersystemsuchasincreasingtheamplitudeofcur

5、rentincircuitwhichmakeacontributiontoenergylosseschangingthevoltageofanodedecreasingthestabilityofpowersystemlowingtheoperationalefficiencyofanelectricalequipmentshtingtheservicelifeofanelectricalequipment.Traditionalrea

6、ctivepowercompensationdevicessuchascapacitsreactsmodernreactivepowercompensationdevicessuchassaturatedreactsthyristcontrolledreactsthyristswitchedcapacitsthyristcontrolledtransfmersareanalyzedcomparedaccdingtothedevelopm

7、entofthetechnologyofreactivepowercompensationitcomesouttheconclusionthatwhichkindofreactivepowercompensationdevicestobeusedinaspecificsituation.Atthesametimeitalsoanalyzescomparesdifferentkindsofmethodsofreactivepowercom

8、pensationincludingcentralizedcompensateinsubstationscentralizedcompensateindistributionsubstationsreactivepowercompensationonpolescompensationattheusers’terminalsfinallyfindsoutthebestmethodofreactivepowercompensationina

9、specificdistributionwk.Byanalyzingadistributionwkexampletheappropriatereactivepowercompensationdevicereactivepowercompensationmethodtomakeareactivepowercompensationthengiveaconclusionaccdingtotheresultofreactivepowercomp