This document describes a method for monitoring short circuits in transmission lines using a PLC and SCADA system. Sensors detect increased current from short circuits and send signals to a PLC. The PLC uses ladder logic to determine the location of the fault and sends an output signal to the substation via an alarm. The SCADA software then identifies the specific faulted tower number and area, allowing operators to quickly address the problem and rectify issues in the transmission network. The goal is to efficiently detect faults, isolate affected areas, and maintain reliable power supply and short circuit protection.

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 LINES
CT
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

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.  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