System overview

Compared with the distribution network, the structure of 110kV and above high-voltage transmission network is simple. Generally, there is no branch line and no distribution transformer. The occurrence rate of overhead line operation grounding fault is relatively high, the line support is generally tower, and the cement pole is less, so the grounding resistance is relatively small after the occurrence of grounding fault;

The fault location system of 110kV and above high-voltage lines is an automatic and efficient fault detection and location system composed of high-voltage line fault indicator, data forwarding station and background monitoring system. It is mainly used for automatic monitoring and positioning system of short circuit and ground fault of 110kV and above high voltage level;

The system is a distributed monitoring, centralized management, real-time notification type line fault fast repair management platform with remote transmission capability. The background fault location software cooperates with the on-site fault detection and indication device, which can display the fault location and time in the background interface within a few minutes after the fault occurs, and transmit the fault location results to the mobile phone number of the designated personnel, so as to help the maintenance personnel rush to the site, eliminate the fault, restore the normal power supply, improve the power supply reliability, and at the same time Greatly reduce the fault line patrol personnel and improve the work efficiency.

System characteristics

■ Fast fault location: accurately locate the fault section within 1-3 minutes;

■ Advanced fault criteria: the load current adaptive intelligent mutation method is used for short-circuit fault criteria; the intelligent transient method is used for grounding criteria, which is judged according to the polarity relationship between the transient change of ground electric field and capacitor current mutation；

■ Convenient project construction: special tools are used for installation and disassembly, so there is no need to arrange power outage plan;

■ Simple communication mode: wireless communication mode is adopted from short-circuit ground fault indicator to data forwarding station; SMS / GPRS communication mode is adopted from data forwarding station to background system.

system function

Realize the fast search and location of faults, reduce the time of fault inspection and troubleshooting;