PSCAD仿真中输电线路电缆模型参数和正序负序零序参数的对应关系分析

电缆模型输出参数单层导体和单层绝缘3.0[m]L.a[m]Dbk?1姑…於:cuasDSx- 峙Candixfcar-^-^^livictorL--_.-■■CcnductoZ_--■]■-"Q42询・・-寸O3EI科 Canrivdtnr-^msu^tflrl*DA应Wa.asMDbk：3.0Em]Rg.K?ht＞：LOO.Ci人MM"曲曲1Apmmiiratkh*i[Dari■百的箪a时Underwird;XKTNin^Oi丹聊期HuE洁小*tKilMp中e*mfi(UJCtA)图1长度100km，输出out文件如下所示:LOADFLOWRXBFORMATTEDDATA€ 50.00Hz:BaseofPer-Unir.Quantities:230*00kV(L-L) ,100.00MVANOTE:BasevaluescouldbechangedusingAdd!ri.onalOptionsComponentpupupcpu6263098225E-026477S50398E4)lpupupcpu6263098225E-026477S50398E4)l6.659376720.847089276E-01ResistailedRsqReactanceXsqSusceptanceBsqSurgeImpedanceZcsqZeroSequence(Long-LineCorrected)ZeroSequence(Long-LineCorrected)ResisranceReactanceSusceptanceSurgeImpedanceResisranceReactanceSusceptanceSurgeImpedance0.143734369E-010.2062310167.699847720.163657504PositiveSequenceResistanceReactanceSusceptanuESurgeImpedancenJnJnJnJNBpllgResistanceReactanceSusceptanuESurgeImpedancenJnJnJnJNBpllg-二二_-■0.296646094E-020.504824295E-016.476949020.882B45859E-01ZeroSequenceResistanceRsqpu: 0.310173610E-0.ReactanceXsqpu: 0.285844716SusceptanceBsqpu: 6.47694902SurgeImpedanceZcsq_pu.: 0.210077647图2用于潮流计算的线路全长的正序和零序参数，这些参数都是标幺值的形式，基准电压230kVU2(230*1000)2基准功率100MW，计算电阻的基准值为：g=i00*]00000f529Q由此对以上参数进行标幺值和有名值的转换，可得：修正后线路全长的正序参数：R=0.2651*10-2*529Q=1.4023QsqX=0.4779*10-1*529Q=25.28QsqB=6.6594sqX=丄*529Q= 1 *529Q=79.436QcsqB 6.6594sq修正后的线路全长的零序参数：R=0.1437*10-i*529Q=7.6QsqX=0.2062*529Q=109.0798QsqB=7.6998sq11X=——*529Q=—— *529Q=68.7031QcsqB 7.6998sq修正前线路正序参数：R=0.29664*10-2*529Q=1.56QsqX=0.5048*10-1*529Q=26.7QsqB=6.4769sqX=丄*5290=―1 *529Q=81.6748QesqB 6.4769sq修正前线路零序参数：R=0.3102*10-1*529Q=16.4096QsqX=0.2858*529Q=151.1882QsqB=6.4769sqX=丄*5290=―1 *529Q=81.6749QesqB 6.4769sq对应。线路全长为100km。修正前的正序参数和零序参数和SEQUENCECOMPONENTDATA中的正序和零序参数可以对应。Zsq的对角线位置，分别是零序、正序和负序。Ysq的对角线同样是零序、正序和负序，可以和修正前的参数对应。线路全长为100km。50.000Hz:SERIESIMPEDANCEMATEIX(ZSERIESIMPEDANCEMATEIX(Z)chms/m':0,65155W55E-04,①C82O74217E-03fl.49^69001&E-04,0.429?41M2E-030.4M6S25&2E-04,0,3S&^73flE-036494^3OTKE-04hOh429^41W3E-O30.胡“册越E-Q4,0-682074217E-^J0,4A463O016E-04,0”4295418^2E-O&Oh494632552E-04,(K385982730E4J30.494e3OT16E-(H,0-429541882E-O90.65155W55E-&4,0-胡2CT7421FET3SHIM4ADMITTANCEMATEIX(¥)'mhos/ni]SHIM4ADMITTANCEMATEIX(¥)'mhos/ni]:0.{KKKKJQOOOE+OO,0.12243760QE-060.{HKKKXM00E+00,0.OOiWIHWWE+OO0.{KKKWOOCtE+OO,0.0fl{XXMW0E+000.(KKKKKKKWJE+Oa0.OOOOOtWDE-bOO0. CL122437frK)E^060.仙网{XXKIEWO,0.OOOOOmJEHKJ0.OOOOOOIKXJE+OO,Q.00000000DE-1K)0.OOOODIWOE-KK),Q.OOOOOOODDE^O0.口聽训{HXXIEHKI,0.12243?eODE4}6LQXG-LISECORRECTEDSERIESIMPEDANCE0,34ft273OS4E+01,CLLQXG-LISECORRECTEDSERIESIMPEDANCE0,34ft273OS4E+01,CL53414SfiS4E+020.204CC0622E+01.0.291366343E+020.210a02a63E+01.0.255178341E+02MATRIX[ohms]:H3侧爾H辺EEP1,0.2913663i3E-bO20.342S17332E-K)hCL527756S^E-H)20.204&6O622E4Q!hCL291366343E4fl20.2108028fi&E-KH,0L2ooa78341EH)2CL20466O622E-H)l,Q.291366343EH)20.349273ftS4E4OlnQ.534148684EPD2LONO-LIXECORRECTEDSHUNTADMI1TAXCEMATEIX[mho^]-LONO-LIXECORRECTEDSHUNTADMI1TAXCEMATEIX[mho^]-fl.I仍5殛34E-CI&CL13W0179E-010.%25^4&7E-04,0,C76145581E-030.9549^1jE-04.0.til4458383E-030,貓乜晞04閒E-667614&&&1E-OS0.L17674591E-03,D.：贮491.轴6ET10.的£59045花-04,il6761435S1E-O10.954926215EH)4,0.(J144883S3E-0S0.962590157E-04,0.67614558LE-OS0.116599a34E-0S,0.132420179E-U]图3以上是相的参数，相和序参数有如下关系对于串联的电阻和电感：1aa2

其中，s(2)+2ZZ为各相的自阻抗、Z-Z■Z一■其中，s(2)+2ZZ为各相的自阻抗、Z-Z■Z一■Z+2Z_0smZ=Z-Z1smZZ-Z2smm(4)为各相间互阻抗。(3)由上边相参数可计算：■Z一■Z+2Z_0smZ=Z-Z1smZZ-Z2sm0.6516*10-4+lj*0.6821*10-3+2*(0.4946*10-4+lj*0.4295*10-3)= 0.6516*10-4+1j*0.6821*10-3-(0.4946*10-4+1j*0.4295*10-3)0.6516*10-4+1j*0.6821*10-3-(0.4946*10-4+1j*0.4295*10-3)1.6408*10-4+1j*1.5411*10-3= 1.57*10-5+1j*2.526*10-41.57*10-5+1j*2.526*10-4该数值和图4中的序分量的零序和正序的电阻和电抗值基本吻合。对于并联的电容，有：之所以采用电纳而不是阻抗，是因为对于并联电路，各相的对地电容Cs和相间电容Cm是并联，流过电流各不相同，但是电压为同一个相电压。而对于串联电路来说，各相的自阻Zs和相间互感Zm是串联的，流过电流相同，而电压不同。因此，式(2)不再使用，因为各相的对地电容Cs和相间电容Cm是不同的，而把电压电流对调位置则可使用，因为对调以后可以认为电流是各相的对地电容Cs和相间电容Cm的电流之和。因此有(5)式成立。因为由相电纳的截图可见Ym=0，因此有正序、负序和零序的电纳相等。SEQUENCECOVFOXE?iTDATA© 50”加Hz;SEQLEXCEERA宜FORMMATRIX:SEQLEXCEERA宜FORMMATRIX:Q.j77a5O269E4Q0nQrOOOOOOOOTE-HKI0.5T7350269E+00,0,aaa(i(](](]：iOE+OO0.577J5O269E400,0.000000(]UOE+OOh5773502e9EHW.OrOQOQOOOOOE+Ofl288675135EHX).-.&[)[)[)aaaaOE+Ofl-.28867aISdEHX).0.&00000000E+000.5773j0269E+00,0.{XHXXW0QE+Q0-.2^96?5135E+00, 500000000E+00-.28^67&135E+00,-.&OOOOOW»E+aaSEQUEXCEIMPEDANCEMATRIX(Zaq)[chms/iu]SEQUEXCEIMPEDANCEMATRIX(Zaq)[chms/iu]:Q.164W1840E-03nQ.1512118&5E-D2 0-125744867E-4H.-.72j978452E-fl5-125744O12E-04,-725993269E-D5D”1569257S4E-O4,0.267052052E-030.L2&741S67E-04,-.72597S4&2E-0&0.251488024E4J1,0.14&198654E-0i-.125744012E-04.-.兀5旳3W9E-口5-.2514S9735E-04,0.14&195690E-Q40.15692&784E-04,0.2670&2052E-03SEQUEXCEADVIRANCEMATRIX(Ysq)；fnhas/m]:SEQUEXCEADVIRANCEMATRIX(Ysq)；fnhas/m]:0.OOOmXWE-UJO,o.1224376OTE4J60.OflO：IOOOOOE+OO,Q-OQQ(J(JO：iOOE-hOOCLOOOOOOOOOE+OO,0.000000000E-+O00-OOQQQQOOflEHM).OrOQQQQQQQQE+Cfl0.000000000E-4W,::.r-i.nd-：m(k000000(J(J(JE+4}D1O.OOOOOOOOOE+OU0.WJOOOQOE+OO,0.mWMDE+000.OWOOOOQQE+QQ,0.：I：IOOOOOO&E+QQ0.OMWOOOOOE+OO,0.122437600E-06图4搭建电缆的模型如图5所示。E#ei芥e取i"1E#ei芥e取i"1Ei-*Eg图5把电缆线路等效成n电路，参数如图6所示。图6如图6所示，两侧的三相电压和电流可以通过测量得到，因此可以计算两侧的正序电压和正序电流，即U1、I1以及U1、I1可知。mmnn电容电流I