energy management power line communicationweb based interface
TRANSCRIPT
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AN-Najah National University
graduation project
Presented by : Saba Ahmad Elsadder Dina Mazen khateeb Dalia Isam Shar`ab
Supervised by : Dr.Mazen Rasekh
Energy management using power line communication
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ObjectivesEnergy management
Power line communication
Web based interface
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Design overview
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Part one
Energy management
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Power reading circuit
Isense
Vsense
Load
Current sensor
SSR
Voltage sensor
220
MCU
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reliable sensing
Voltage sensing:
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• Input signal • Output signal
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Current sensor
The first choice was hall effect sensor
Hall Effect sensors are designed to measure relatively large currents.
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Current sensor (cont`d )
• The other choice was to use a thermal series resistor to sense the current going through the load .
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• The voltage drop across R series is proportional to the load current
I load(A)
v sense
0.2 .182
0.9 .24
1.35 .368
3 .418
3.38 .462
3.7 .506
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Power line communication
Part two
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Benefits
PLN takes advantage of the unused capacity of the power cable to transmit data over the existing home power cabling.
A low cost solution. No additional rewiring. Capable of distributing data as fast as 10 + Mbps.
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Challenges
Noisy environment.Security issuesData attenuationShared mediaRegulatory issues in some internationalmarkets
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Applications
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Design and verification
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Power line modem
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Power line modem
Modem and crystal oscillator section
Line coupling interface section
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Modem and crystal oscillator section
Half-duplex frequency shift keying (FSK)
Transceiver. 8 Programmable transmission
frequencies Programmable baud rate
up to 4800BPS
Carrier frequency : 132.5 KHz. Baud rate : 2400 Bps .
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Data sent to Power Line Modem using asynchronous serial communication
MCU Target
modem
M
MCU Host
modem Power lines
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Line coupling interface section
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High power section
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Basic transmission and reception
• FSK modulation
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Received data
Transmitted data
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Video
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part three
web interface
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Web server
PHP Database
Visual basic
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Visual basic
Database Microcontroller
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Database
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Future work • Accessing the control register of the
modem and using all the functions built in st7540 (header recognition ,addressing ) .
• Build a network of modems and control loads from multiple places .
• Home automation