三芯集电电缆故障电流信号检测传感器的设计及应用  

Design and Application of Fault Current Signal Detection Sensor for Three-Core Collector Cables

作　　者：蒙井秋 李怡冬 Meng Jingqiu;Li Yidong(State Power Investment Group Chengde New Energy Power Generation Co.,Ltd.,Chengde Hebei 067000,China)

机构地区：[1]国家电投集团承德新能源发电有限公司,河北承德067000

出　　处：《现代工业经济和信息化》2024年第12期110-113,共4页Modern Industrial Economy and Informationization

摘　　要：从集电电缆周围的磁场分布特性入手,研究电缆圆周表面切向磁场强度的模值及相位的变化规律,进而得出线圈感应电压在电缆圆周表面不同位置处的数值体现,从而提出一种采用分布式感应线圈布局的电流传感器。该结构避免了感应线圈各圈线匝之间因集电电缆空间磁场相位差异而存在相互抵消感应电压的情况,提高了传感器输出电流的能力,较好反映出集电电缆故障电流的变化特征,保障了集电电缆故障信号的监测效果,对提升故障诊断成功率和集电电缆运作效率具有重大促进意义,间接提高了风力发电场的发电经济收益。Starting from the characteristics of the magnetic field distribution around the collector cable,we study the change rule of the modulus and phase of the tangential magnetic field strength on the circumferential surface of the cable,and then derive the numerical value of the induced voltage of the coil at different positions on the circumferential surface of the cable,so as to put forward a kind of current sensor adopting the layout of the distributed inductive coil.The structure avoids the induction coil turns of each coil due to the collector cable spatial magnetic field phase difference and the existence of mutual offsetting induction voltage,improve the ability of the sensor output current,which can better respond to the change characteristics of the collector cable fault current,guarantee the monitoring effect of the collector cable fault signal,enhance the success rate of fault diagnosis and collector cable operation efficiency has great significance,and indirectly improve the economic returns of the wind farm power generation.

关 键 词：风电场 集电电缆 分布式感应线圈 故障诊断 

分 类 号：TM933.13[电气工程—电力电子与电力传动]