1. SHORT CIRCUIT MONITORING BY USING PLC & SCADA
M.RAGUL BHAVAN,
EEE DEPARTMENT,
KNOWLEDGE INSTITUTE OF TECHNOLOGY
KAKAPALAYAM , SALEM (DT)

2. MAIN OBJECTIVE
Now a days, if power failure is occurred by means of any short circuit in transmission line, the line man has to inspect the entire network from the transformer to the tail end.
This traditional method of detecting fault takes more time and it may cause risk to the line man in some abnormal situations (like in rainy session). We found solution for this real time issue by means of our paper called “PLC” which indicates the sequence of the fault occurred in a SCADA.

3. WORKING METHODOLOGY
HV Transmission lines are the Major part of the electrical distribution system, as they provide the path to transfer power between generation and load.
Transmission lines operate at voltage levels from 69kV to 765kV, and are ideally tightly interconnected for reliable operation.

4. Transmission protection systems are designed to identify the location of faults and isolate only the faulted section by the help of PLC.
The key challenge to the transmission protection lines in reliably detecting and isolating faults compromising the security of the system.

5. LAYOUT OF HV TRANSMISSION LINESCT
SUBSTATION
PLC
programmable
logic
Controller
ALARM
SCADA
(MONITOR)

6. IMPLEMENTATION OF PLC
We developing this logic program by using ladder diagram method in PLC (RS logix 500) software.

7. If any short circuit occurred in transmission lines automatically current rating will be increased.
This high current rating will be sensed by the sensor and gives as input to the PLC.
After receiving input signal as per
Ladder logic program the plc produce the output signal to the substation through Alarm

8. Monitoring the entire process in SCADA software

9. IMPLEMENTATION OF SCADA
SCADA stands for Supervisory Control And Data Acquisition.
Which is playing a vital role on supervisory level & it’s a purely software package .
It is interfaced between the PLC via Programmable Logic Controllers (PLC's), or other commercial hardware modules.

10. SCADA Monitoring Process
By using scada the user can identify the faulted tower number & area.
It will use to rectify the problem easily.

11. CONCLUSION
The main scope of this paper is to detect the exact position of the fault occurred in the overhead HV power transmission line by PLC in a sequential manner and to display in SCADA.
To provide an uninterrupted power supply and short circuit protection in transmission lines.
Thus by using this system,we serve the power efficiently to the people

12. THANK YOU