110KV 3 Phase Voltage Indicator Location / Detection System For Overhead Line

TYHD-AI/110 OverheadLine Communicable Fault Indicator is applied to 110kV overhead line ,is a device to indicate line fault current. This system is composed of two parts, one is gathering unit and the other is collection unit.gathering unit monitors line running status real-time. When fault happened ,the gathering unit can quickly locate phase-phase short-circuit area,the fault line and fault point can be judged quickly and accurately.in the meantime, the alarm flag turn red and appear flashlight and the fault signal also be transmitted to collection unit. After receiving signal from gathering unit, the collection unit send the received data to master monitoring station through wireless communication (GPRS/CDMA etc.)

The master station monitoring software analyze the received data and network topology, then to confirm the fault location and appear audible and visual alarm signal, in the meantime, the master station send the analyzed fault information to the operator’s cellphone and help them to find the fault point quickly, it reduces the power-off duration and improve the power supply reliability.

Principle instruction:

1.Application principle:

The fault indicator’s gathering unit uses gripping structure and coil to induct line current and electrical field signal, these signals are gathered and dealt with through low power consumption single-chip and finish the line load current calculation&short-circuit detection and realize short-distance wireless communication through inner-equipped wireless module with low power consumption,then send the signals to collection unit.

When gathering unit detects that the line current is corresponds to short-circuit characteristics, it immediately transmit the fault information to collection unit nearby through wireless module, in the meantime, alarm appears in means of red flag and flashlight, the collection unit receives every kind of signals then real-time transmit them to the master station monitoring platform through remote wireless communication, the master station will complete the data analysis and fault judgement.

Device application principle is as following diagram:

2.Fault detection principle:

TYHD-AI/110 overhead line remote transmission fault indicator is composed of gathering unit and collection unit. gathering units complete the judgement of short-circuit and local alarm;collection unit completes the fault signals and data transmission.

2.1)short-circuit detection principle:

Short-circuit detection adopts load current self-adaption intelligent sudden changes method.

According to the characteristics of short-circuit, it judges the fault through electromagnetic inductive method to detect the sudden changed current in line and sudden changed current duration,it is a kind of fault detection device which automatically adapts to load current changes and only related with short-circuit current component.The short-circuit detection principle is that the line current will change .

Functions:

1.gathering unit introduction

1)fault indication:

1.1)short-circuit and earth fault indication: when short-circuit or earth fault happened,the gathering unit in the correspoding phase of the fault line area detects the fault and sends out the alarm indication.

1.2)fault alarm is transmitted remotely: the fault alarm information is outputted in the means of wireless communication.

2)intelligent reset:

2.1)permanent fault: automatically reset after power restore in a very short time
2.2)transient fault: automatically reset, the reset time can be configured as 4,8,12,24 hours before delivery.

3)Anti-misalarm for load wave: in the status of non-fault wave for line current, the gathering unit will not mis alarm the fault.
4)Automatically avoid switching-in rush current : when line is powering switch(or recloseing),the gathering unit installed this line can escape the rush current and not mis-alarm.
5)recloser minimum recognition time:

5.1)the gathering unit can recognize the transient fault with the recloser duration of 0.2 seconds and can alarm accurately.

5.2)The gathering unit installed in non-fault branch will not mis-alarm when sense recloser rush current after experiencing 0.2 seconds of recloser interval power outage.

6)Live install and uninstall

2. collection unit introduction

1)wireless receiving data

2)Remotely wireless public network sending

3)Support multi-power supply

4)flexible stand-by power supply equipped

5)communication is chooseable
6)remote upgrade
7)easy maintenance
8)Events record
9)Hearbeat can ne configured
10)Clock synchronization and timing

There is type test report for it, test items as following: