Schematic Diagram Of Power Line Guardians Case Study

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Fig. 3. Schematic Diagram of Power Line Guardians (“PLG”)
PLGs are also used to give the real-time data on the lines such as: line current, conductor temperature, frequency, sag [17]-[21]. Fig. 4. The PLG communications system.
The diagram (Fig.4) shows the PLG communications system. PLGs (blue) control the power flows on the lines. Super PLGs (red) can control both the power flows and the PLGs. These Super PLGs are also used to communicate with Energy Management Systems (EMS) and allow the automatic control of PLGs [22]-[24]. Limitations of Power Line Guardians (“PLG”): The retail price of Smart Wires is $1000 per 10 kVA module [20].
V. Design, Working principal and Operation of F-PLCCG (Frequency Power Line Carrier -Communication Guardian):
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7. Flow chart: F-PLCCG operation between substations to substation Fig. 8. F-PLCCG Field connection between substation to substation
Precondition:
Step 1: At equal distance between Sub-Station “A” &”B”, arrange F-PLCCG
Step 2: F-PLCCG (Frequency Power Line Carrier Communication Guardian) has Frequency Receiver in Bi-Directional mode.
Step 3: Preferred frequency for PLC (Power Line carrier) is 100 KHZ to 140 kHz
Step 4: Sub-Station “A” &”B” contains PLC Modem and program Logic controller (Pre-program) unit with GSM connection.
Step 5: For Better understanding of Algorithms, we symbolize Power line communication signal as Communication signal and Program Logic Controller Signal as Automation signal.
Algorithms Steps (Fig.7):
Step 1:Sub-station “A” PLC Modem will send “communication Signal” to “F-PLCCG“ via Transmission line and as soon as signal passes from PLC modem, Program Logic Controller(at substation) sends “Automation signal’ to Program Logic Controller(at F-PLCCG) for activation of Switches (
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If F-PLCCG status is “OK” it will execute as in Step 3, if it’s “NOK”, it will execute as in Step 5.
Step 3: Stop “X” Signal from Transformer PLC. F-.PLCCG Receives Communication signal “Y” from Street 1 of PLC Modem and Status of Transmission line send to Sub-Station “A” & Control Box at T/F (Transformer) via Communication system arranged in “F-PLCCG” and F-PLCCG sends only “OK” or “NOK” Signal to Sub stations. If F-PLCCG status is “OK” it will execute as in Step 4, if it’s “NOK”, it will execute as in Step 5.
Step 4: Stop “Y” Signal from Street 1.F-PLCCG Receives Communication signal “Z” from Street 2 of PLC Modem and Status of Transmission line send to Sub-Station “A” & Control Box at T/F (Transformer) via Communication system arranged in “F-PLCCG” and F-PLCCG sends only “OK” or “NOK” Signal to Sub stations. If F-PLCCG status is “OK”, it will execute as in Step 5, if it’s “NOK”, it will execute as in Step

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