網(wǎng)絡(luò)環(huán)境下變電站自動(dòng)化系統(tǒng)脆弱性評(píng)估.pdf

1、華北電力大學(xué)碩士學(xué)位論文摘要本文結(jié)合變電站自動(dòng)化系統(tǒng)的特點(diǎn)和分布式系統(tǒng)脆弱性理論，提出網(wǎng)絡(luò)環(huán)境下變電站自動(dòng)化系統(tǒng)脆弱性評(píng)估方法。通過對(duì)系統(tǒng)的形式化定義，構(gòu)造表征攻擊過程的脆弱性狀態(tài)圖參考指數(shù)分布特性，以脆弱度因子和等效攻擊代價(jià)為參量，定義了狀態(tài)轉(zhuǎn)換的脆弱度函數(shù)并按照脆弱性狀態(tài)圖的連接方式定義了3種類型的脆弱度計(jì)算模型。進(jìn)一步考慮變電站自動(dòng)化系統(tǒng)的信息安全特點(diǎn)，設(shè)計(jì)了基于層次分析法和逼近理想解排序法的脆弱度因子量化計(jì)算方法。根據(jù)IEC61

2、850構(gòu)建了評(píng)估算例，通過不同安全方案下的脆弱度計(jì)算比較，該方法能有效的量化系統(tǒng)脆弱度，對(duì)安全策略制定起指導(dǎo)作用。關(guān)鍵詞:變電站自動(dòng)化系統(tǒng)，IEC61850，信息安全，脆弱性狀態(tài)圖，層次分析法ABSTRACTCombinedwitheharacteristicsofnetwork一basedsubstationautomationsystem(SAS)andtheeoneePtofdistributedsystemvulnerabili

3、ty，avulnerabilityassessmentmethodfornetwork一basedSAS15ProPosedinthisPaPer.ThesubstationautomationsystemhasbeendefinedfmallytoeonstruetvulnerabilitystategraPh(VSG).Thevulnerabilityofsingleaetion15definedbasedonexPonential

4、distributionfunetionineludingParalneters，whieealledvulnerabilityfaetorandequivalentattaekingeost，andthenthevulnerabilityvalueoftargetsystemsareealeulatedbythreeeonneetionmodelsofVSG.Furthermore，eonsideringtheeharaeterist

5、iesofinfmationseeurityinSAS，avulnerabilityfaetorquantifieationmethodbasedonAHP一TOPSIS15designed.Anassessmentinstanee15eolistruetedaceordingtoIEC61850standard.ByeomParisonofvulnerabilitycaleulationindifferentsehemes，thePr

6、oPosedmethod15aPPlieabletoquantifyvulnerabilityofnetwk一basedSASeffectivelyProvideguidaneefseeuritystrategyestablishment.ZhangHao(EleetriePowerSystemandAutolnation)DireetedbyProf.ZhangJianhuaKEYWORDS:substationautomations

7、ystem，IEC一61850，info一mationseeurity，vulnerabilitystategraPh，analytiehierarel一yProeess華北電力大學(xué)碩士學(xué)位論文4.4.3規(guī)范化處理評(píng)價(jià)指標(biāo)值…4.4.4計(jì)算各行為的脆弱度因子.第五章脆弱性評(píng)估的流程....……第六章算例分析.…，.......……6.1系統(tǒng)實(shí)例...........……6.2構(gòu)建脆弱性分析模型.....……6.3量化脆弱度因子.....