登录    |    注册

您好,欢迎来到中国测试科技资讯平台!

首页>《中国测试》期刊>本期导读>三芯电力电缆各芯线电流测量偏心误差的计算和补偿方法

三芯电力电缆各芯线电流测量偏心误差的计算和补偿方法

322    2019-01-30

¥0.00

全文售价

作者:袁燕岭1, 李凯特2, 董杰1, 高俊福1, 李世松2, 赵伟2

作者单位:1. 国网唐山供电公司, 河北 唐山 063000;
2. 清华大学电机工程与应用电子技术系 电力系统及发电设备控制和仿真国家重点实验室, 北京 100084


关键词:电力电缆;电流测量;偏心误差;旋转法;电磁场有限元仿真


摘要:

用磁传感器测量三芯电力电缆各芯线的电流时,磁传感器阵列的中心可能偏离电缆中心,致使测量结果中含有由此产生的误差即偏心误差,为此提出一种对偏心误差的计算和补偿方法。在原有测量方法基础上,将磁传感器阵列沿电缆轴向安装表面旋转180°,测量新位置上的磁感应强度。通过求解非线性方程组,可以确定偏心误差的大小;并据此对测量结果进行补偿,可得到计及偏心误差情况下三芯电力电缆各芯线电流值的实际大小。电磁场有限元仿真试验结果表明,所建立的解析模型具有很好的准确性,验证所提出计算和补偿方法的有效性。


Calculation and compensation method for eccentric error of current measurement of each core wire of three-core power cable
YUAN Yanling1, LI Kaite2, DONG Jie1, GAO Junfu1, LI Shisong2, ZHAO Wei2
1. Tangshan Power Supply Company, Tangshan 063000, China;
2. State Key Laboratory of Control and Simulation of Power System and Generation Equipment, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Abstract: When magnetic sensors are used to measure the current of each core of a three-core power cable, the center of the magnetic sensor array may deviate from the center of the cable, resulting in errors in the measurement results, i.e., eccentric error. For this reason, a method for calculating and compensating the eccentric error is proposed. Based on the original measurement method, the magnetic sensor array is rotated 180° along the axial installation surface of the cable, and the magnetic flux density at the new position is measured. By solving the nonlinear equations, the value of eccentric error can be determined. Based on this, the measurement results can be compensated, and the actual value of the current of each core of the three-core power cable under the condition of eccentric error can be obtained. The results of electromagnetic field finite element simulation test show that the analytical model established has good accuracy, which verifies the effectiveness of the proposed calculation and compensation method.
Keywords: power cable;current measurement;eccentric error;rotation method;electromagnetic field finite element simulation
2019, 45(1):19-26  收稿日期: 2018-05-09;收到修改稿日期: 2018-07-12
基金项目:
作者简介: 袁燕岭(1982-),男,河北邯郸市人,高级工程师,硕士,主要从事电力系统研究
参考文献
[1] 韩立奎, 王海涛, 韩晓冰. 35 kV电缆设计中三芯与单芯电缆的选择与比较[J]. 电线电缆, 2011(5):15-16, 22
[2] 周远翔, 赵健康, 刘睿, 等. 高压/超高压电力电缆关键技术分析及展望[J]. 高电压技术, 2014, 40(9):2593-2612
[3] 袁燕岭, 李世松, 董杰, 等. 电力电缆诊断检测技术综述[J]. 电测与仪表, 2016, 53(11):1-7
[4] 周承科, 李明贞, 王航, 等. 电力电缆资产的状态评估与运维决策综述[J]. 高电压技术, 2016, 42(8):2353-2362
[5] 高云鹏, 谭甜源, 刘开培, 等. 电缆接头温度反演及故障诊断研究[J]. 高电压技术, 2016, 42(2):535-542
[6] 刘刚, 张高言, 周凡. 基于等温松弛法的110 kV高压电缆老化状况评估[J]. 高电压技术, 2014, 40(2):497-504
[7] 姜芸, 周韫捷. 分布式局部放电在线监测技术在上海500 kV交联聚乙烯电力电缆线路中的应用[J]. 高电压技术, 2015, 41(4):1249-1256
[8] OUYANG Y, HE J, HU J, et al. A current sensor based on the giant magnetoresistance effect:Design and potential smart grid applications[J]. Sensors, 2012, 12(11):15520-15541
[9] 何金良, 嵇士杰, 刘俊, 等. 基于巨磁电阻效应的电流传感器技术及在智能电网中的应用前景[J]. 电网技术, 2011, 35(5):8-14
[10] 袁燕岭, 李世松, 董杰, 等. 用磁传感器测量三芯对称电缆相电流的方法[J]. 中国测试, 2016, 42(8):29-32
[11] 李世松, 袁燕岭, 董杰, 等. 一种计算三芯电力电缆表面磁场的解析方法[J]. 中国测试, 2017, 43(4):95-99
[12] YUAN Y, DONG J, GAN J, et al. A three-core power cable online monitoring system based on phase current sensing[C]//Instrumentation and Measurement Technology Conference (I2MTC), 2017 IEEE International, 2017:1-6.