采用直流法对XLPE电缆进行在线检测的抗干扰技术研究.doc

单芯XLPE电缆26/35 kV、 YJV、YJLV 结构参数 导体标称截面mm2导体直径mm绝缘标称厚度mm护套厚度mm电缆外径mm电缆重量kg/kmCuAl9512015018524030040050063080011.613.014.616.218.420.623.826.630.034.010.510.510.510.510.510.510.510.510.510.52.32.32.42.52.52.62.72.82.93.045464850515458646872258028803260367043004990610074108790106201990214023302540282031303620432048905670电气参数导体标称截面mm2导体交流电阻/km 电抗 /km电容F/kmCuAl951201501852403004005006308000.2460.1960.1590.1270.09750.07820.06210.04960.03980.03280.4100.3240.2640.2110.1610.1290.1010.07930.06250.05020.1460.1400.1350.1310.01240.01210.01160.01150.01110.01070.130.140.150.160.180.190.210.240.260.28载流量（A）导体标称截面mm2土壤 土壤 空气 空气 CuAlCuAlCuAlCuAl951201501852403004005006308003303754204755556307208259401060255290325370430492565645740845315360400455525595680775875970240270305345400455525600685770370425485555650745870100011601330285330375430505580680790920106033037542548556065076087510001130255290330380435510595690800920三芯XLPE电缆26/35 kV、YJV、YJLV 结构参数 导体标称截面mm2导体直径mm绝缘标称厚度mm护套厚度mm电缆外径mm电缆重量kg/kmCuAl5070951201501852403004008.310.011.613.014.616.218.420.623.810.510.510.510.510.510.510.510.510.53.53.6 3.73.83.94.04.24.34.6838791949810110611111855107830891099601230012610146601694020190478065207300770084109140101701032011690电气参数导体标称截面mm2导体交流电阻/km电抗/km电容F/kmCuAl5070951201501852403004000.4930.3420.2470.1960.1590.1280.09770.07860.06260.8220.5680.4110.3250.2650.2110.1610.1290.1010.1490.1410.1340.1280.1230.1190.1150.1110.1040.110.120.130.140.150.160.180.190.21载流量（A）导体标称截面mm2土壤空气CuAlCuAl507095120150185240300400210265315355400450525590675170200245275315350410460530215270325370425480565645750165210250290330375440505590三芯XLPE电缆26/35 kV、YJV22、YJLV22 结构参数导体标称截面mm2内护套厚度mm钢带厚度mm外护套厚度mm电缆外径mm电缆重量kg/kmCuAl507095120150185240300 2.02.02.12.22.22.32.42.5 2*0.82*0.82*0.82*0.82*0.82*0.82*0.82*0.83.73.83.94.04.14.24.44.6 9195991021061101151201030011480127501393015360169301925021790 968010200110101173012590135001480016230电气参数导体标称截面mm2导体交流电阻/km电抗/km电容F/kmCuAl5070951201501852403000.4930.3420.2470.1960.1590.1280.09770.0786 0.8220.5680.4110.3250.2650.2110.1610.1290.1490.1410.1340.1280.1230.1190.1150.111 0.110.120.130.140.150.160.180.19 载流量（A）导体标称截面mm2土壤空气CuAlCuAl507095120150185240300210260315350390445515565 165200245270300345400445 210260330360410465545610165200255280320365425475 单芯XLPE电缆64/110 kV、 YJV、YJLV、YJY、YJLY 结构参数 导体标称截面mm2导体直径mm绝缘标称厚度mm护套厚度mm电缆外径mm电缆重量kg/kmCuAl24030040050063018.420.623.826.630.019.018.517.517.016.54.04.04.04.04.0737576798171107710862097001099056205850614066007100电气参数导体标称截面mm2导体交流电阻/km 电抗 /km电容F/kmCuAl2403004005006300.09720.07800.06170.04910.03930.1610.1290.1010.07900.06210.1470.1410.1330.1280.1220.120.130.150.160.18载流量（A）导体标称截面mm2土壤 土壤 空气 空气 CuAlCuAlCuAlCuAl24030040050063054061069579090042047554562571551057565073583039545051558567063072084096511154905606557658905856657708851015455520605705815单芯XLPE电缆64/110 kV、 YJAY、YJLAY结构参数 导体标称截面mm2导体直径mm绝缘标称厚度mm护套厚度mm电缆外径mm电缆重量kg/kmCuAl24030040050063018.420.623.826.630.019.018.517.517.016.54.04.04.04.04.0798182848771607760867097501105056705890621066507150电气参数 导体标称截面mm2导体交流电阻/km 电抗 /km电容F/kmCuAl2403004005006300.09720.07800.06170.04910.03930.1610.1290.1010.07900.06210.1520.1460.1380.1320.1270.120.130.150.160.18载流量（A） 导体标称截面mm2土壤 土壤 空气 空气 CuAlCuAlCuAlCuAl24030040050063055062070580091543048555563573051558566575084540045552059568064574086099011455005756757809106006857959101045465535625720835单芯XLPE电缆64/110 kV、 YJQ02、YJLQ02、YJQ03、YJLQ03结构参数 导体标称截面mm2绝缘标称厚度mm 铅层厚度mm外护套厚度 mm电缆外径mm电缆重量kg/kmCuAl24030040050063019.018.517.517.016.5 3.03.03.03.03.04.54.54.54.54.5818283868813560144001545016640183101208012550129801355014410电气参数导体标称截面mm2导体交流电阻/km 电抗 /km电容F/kmCuAl2403004005006300.09720.07800.06170.04910.03930.1610.1290.1010.07900.06210.1530.1470.1380.1340.1270.120.130.150.160.18载流量（A）导体标称截面mm2土壤 土壤 空气 空气 CuAlCuAlCuAlCuAl24030040050063055062070580091543048555563573051558566575084540045552059568063573085098011304955656657708905906807859001035460530615715825 7.环境条件对电缆载流量的修正系数7.1土壤敷设 土壤温度变化土壤温度15202530354045系 数1.071.041.00.960.920.870.83土壤热阻变化土壤热阻km/w1.01.21.52.02.53.03.5三芯电缆1.00.9430.8770.7920.7360.6750.641单芯电缆1.00.9340.8500.7480.6920.6350.598敷设深度变化敷设深度m3.6/6kV26/35kV48/63 kV、64/110 kV0.500.701.041.050.710.901.001.020.911.100.981.001.111.400.960.97多芯电缆水平敷设组间距离变化间距m回 路 线23456810接触0.790.690.630.580.550.500.460.070.850.750.680.640.600.560.530.250.870.790.750.720.690.660.647.2空气敷设空气温度变化 环境空气温度20253035404550系数1.181.141.101.051.00.950.89电缆敷设组间影响电缆在下列布置情况下，回路周围空气自由循环，可不考虑影响载流量降低系数：（I）回路水平方向净距不小于2倍单根电缆外径；（II)回路垂直方向净距不小于4倍单根电缆外径；（III）水平方向敷设回路数超过3个的情况。8.1导体的允许短路电流根据IEC949、IEC986计算交联聚乙烯电缆导体允许短路电流，导体短路前温度90，短路后温度250。单位：kA导体标称截面mm2短路持续时间（S）铜导体铝导体12312325355070951201501852403004005006308003.85.27.610.313.917.521.82.634.843.457.872.290.9115.32.73.75.37.39.912.515.519.124.730.941.151.364.581.82.23.04.36.08.110.212.815.720.325.333.642.052.866.32.53.54.96.89.211.614.417.723.028.738.247.760.076.11.82.53.54.96.58.210.312.616.320.427.133.842.654.01.52.12.94.15.46.88.410.413.416.722.227.734.944.2