Simulation of SCADA Signals Based on the Message Structure of the IEC 60870-5-101 Tele-control Protocol
Simulation of SCADA Signals Based on the Message Structure of the IEC 60870-5-101 Tele-control Protocol
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Date
2015-05-03
Authors
Abdelraheem, Musaab Abdelmageed
Journal Title
Journal ISSN
Volume Title
Publisher
UOFK
Abstract
The SCADA systems are very important to control widely distributed
power networks. Each SCADA system uses a tele-control protocol for
communication between stations, one of the commonly used protocols is
the IEC60870-5-101 standard tele-control protocol .
For this study, the IEC60870-5-101 was selected to simulate SCADA
signals transferring between two stations due to its wide spread use in the
tele-control systems, and it is also considered as a base structure for
modern tele-control systems such as IEC60870-5-104.
The aim of this simulation is to study the behavior of the tele-control
protocol. Visual basic programming language was used to implement this
simulation. The simulation was done by taking a transformer tap changer
as an example for the experiment. For this tap changer, Regulating
commands from the central station (control centre) were sent to the
controlled station(remote station) in order to raise or lower the tap changer
position then the step position indications were sent from the controlled
station to the central station.
Additional SCADA functions, such as generation of alarms and
implementation of interlocks, which are not present in the existing SCADA
systems, were added within centre station besides its generation in the
remote station.
Description
Keywords
Simulation,SCADA Signal,Message Structure,IEC 60870-5-101,Tele-control,Protocol