Splitting each packet ( 115 digit strings from the substation with
two feeders) into 3 segments 2 of them represent feeders
readings and one represents substation readings.
Depending on these reading, decisions are taken, that is:
- If the substation and its feeders status is ok (feeder state is OFF,
current value of feeder 33kv type is less than or equals 400A and
300A for type 11Kv,transformer oil temperature not above 55°C,
and no fire) the server will send a ON state signal to the substation
and its feeders. - If the current value of the feeder 33kv type is above 400A and
300A for type 11Kv, a failure status signal will be sent to the server
which will send a feedback OFF signal to turn that feeder off. This
feeder will not turn ON back until the error is fixed. - If the transformer oil temperature is greater than 55°C, this
indicates that an error has occurred, and a failure status signal is
sent to the server which will send feedback OFF signal to turn that
feeder Off. This feeder will not turn ON back until the error is
fixed. - If a fire alarm is detected in the substation, the indicator (FA) will
turn ON and a fire status signal will be sent to the server which will
return a feedback signals to turn the substation and its feeders OFF.
This substation and its feeders will not turn ON back until the fire
is extinguished.
The main conclusions from this work are: - NI instruments and The LabVIEW software could efficiently be used
to imitate SCADA system. - The signals successfully sent (analog and digital) from the
substations are displayed on the server front panel.