Title :
The Design of Distributed On-line Monitoring System for Metal Sheath´s Circulating Current of Cross-linked Power Cables
Author :
Fa-dong, Peng ; Yan Li ; Li, Yan ; Yong-hong, Cheng ; Xu-sheng, Chen ; Xiao-lin, Chen ; Yong-peng, Meng
Author_Institution :
State Key Lab. of Electr. Insulation & Power Equip., Xi´´an Jiaotong Univ., Xi´´an
Abstract :
The circulating current method can judge whether the multipoint earthing fault happens by monitoring the variety of metal sheath´s circulating current value. This article introduce an on-line monitoring system which use the circulating current method to monitor the multipoint earthing fault of the metal sheath. In the hardware layer, we use distributed current sensors and microcontroller´s acquisition units to complete the signal acquisition and signal conditioning of the circulating current value. After the distributed acquisition and conditioning, the signals, through the RS485 bus, will be sent to the Ethernet Serial Device Server network system and then connected to the console cabinet. The computer of the console cabinet could read the circulating current value on-line by the Real Com Mode of the Ethernet Serial Device Server. This distributed on-line monitoring system has a simple structure, excellent real-time performance and high reliability proved by the practical operation.
Keywords :
earthing; fault diagnosis; monitoring; power cables; power distribution protection; power distribution reliability; Ethernet Serial Device Server Network system; cross-linked power cables; distributed current sensors; distributed on-line monitoring system; microcontroller acquisition units; multipoint earthing fault; sheath circulating current; signal acquisition; signal conditioning; Cable insulation; Cable shielding; Circuit faults; Current transformers; Ethernet networks; Grounding; Monitoring; Power cables; Power transformer insulation; Voltage; circulating current; cross-linked; distributed system; on-line monitoring; power cable;
Conference_Titel :
High Voltage Engineering and Application, 2008. ICHVE 2008. International Conference on
Conference_Location :
Chongqing
Print_ISBN :
978-1-4244-3823-5
Electronic_ISBN :
978-1-4244-2810-6
DOI :
10.1109/ICHVE.2008.4773997