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GSM based energy meter reading with load control
Transcript of GSM based energy meter reading with load control
GSM BASED ENERGY METER READING WITH LOAD CONTROL USING ATmega328 Microcontroller
Mr. Khurram Shahzad Khalid
Reduction in Billing/metering errors.
Significant reduction in manpower.
Improved Cash Flow Management
Transparency in metering systems
AN OVERALL VIEW OF THE SYSTEM
Power Supply Circuit
The circuit needs 2 different v/gs, +5V & +12V, to work.
The stabilization of DC output is achieved by using the three terminal voltage regulator IC.
These regulator ICs have in-built short-circuit protection and auto-thermal cutout provisions. We are majorly using LM7805/KIA 7812 in our circuit.
1 (I/P) 2(GND) 3(O/P)
What it actually looks like...
Voltage & Current SENSORS
Core Components of voltage & current sensors
The voltage sensor consists of step-down transformer and voltage divider. Transformer steps-down the voltage from 220V to 9V, voltage divider then divides the 9V voltage and gives the analog values to the micro-controller
Hall-effect ACS712 IC is used as current sensor it senses the current and gives value to the controller
We implemented a standard type Energy Meter in this project which measures electricity consumption in terms of KWh, the amount of energy used by a load of one kilowatt over a period of one hour
Single phase KWH digital energy meter
Operating voltage 220V
Current sensitivity 10(40)A
1 unit = 1600imp/kwh
The GSM Module is used to
for getting readings and operation related purposes.
PD.0 & PD.1
of the uC the GSM unit
by SimCom is connected.
A GSM modem is a
that works with GSM wireless networks. A wireless modem is similar to a dial-up modem. Most mobile phones can be used as a wireless modem.
To send SMS messages, first place a valid SIM card into a GSM modem, which is then connected to micro-controller. After connecting a GSM modem to a micro-controller, you can control the GSM modem by sending instructions to it.
The user can modify the instructions according to the requirement, the basic instructions that we would be using have already been discussed above.
Complete Power Supply Circuit
A 14 pin access is provided having 8 data lines,3 control lines and 3 power lines.
Connections are laid out in one of two common configurations, either two row of seven pins, or a single row of 14 pins.
Our project basically proves as an advantage to both the users in large offices, colleges, etc and the electricity board people
By using this project we can reduce a major share of physical work i.e., the deployment of manpower on a large scale
Secondly, the overall system of operation turns out to be cheaper than the present system as the system is based on SMS, which in today’s world are very economical
Thirdly, our project in centered around the idea of energy conservation
1. Every consumer is provided by GSM based system
2. The system is then integrated with the existing energy meter
3. Once system is installed the user can remotely control the system through GSM from anywhere in the world
4. With the help of this proposed system the user can get the unit consumption readings and also control the load
5. A LCD displays the whole process e.g. sending & receiving SMS process
6. GSM send SMS only on a predefined number
Operate via SMS
How the idea progressed!
VT and CT SENSOR
Power Consumption Analysis
Clear & Accurate Billing
Smart Automated Process
GSM BASED ENERGY METER READING
(cc) image by nuonsolarteam on Flickr
Remote Load Control
Meter Readings Related commands
the Number For Getting Readings
Send SMS to get Readings
Through SMS or Call For Getting Units Consumed
If dues payed/Not-payed, electricity board operator can switch supply on/off resp.
Complete power supply is disconnected
Complete power supply is restored
Basics of GSM...
How the system operates via SMS...
Interfacing the micro-controller
We have used ATmega328
Belongs to AVR family
Moving towards the uC connections.
The uC has various devices like the GSM Module, LCD,VT & CT sensors connected to its various pins.
GSM unit # PD.0(Rx) & PD.1(Tx) of uC[serial I/O pins].
2x16 LCD[D0-D7] #with 2 ports of the uC.
CT sensor # ADC3 of uC.
VT sensor # ADC0 of uC.
What this circuit actually looks like...
Looking further into the LCD operation.
A 2x16 LCD module that uses the Hitachi HD44780 controller chip is used.
To display any character on LCD micro controller has to send its ASCII value to the data bus of LCD.
For e.g. to display 'AB' micro-controller has to send two hex bytes 41h and 42h respectively.
Moving towards the uC.
An integral part of the system.
The main object of this ‘power supply’ is, as the name implies, to deliver the required amount of stabilized and pure power to the circuit.
Now, we move on to the Power Supply Design for the circuit.
RFID based Prepaid Energy Effecient Meter
On the outside
GSM Based Energy Meter Reading With Load Control Using ATmega328 Micro-controller
How it helps...
Finally, the proposed system
Going towards the Energy Meter
Moving towards the GSM operation
ACS712 CT sensor
TO DEVELOP A GSM BASED REMOTELY CONTROLLED METER READING SYSTEM
8 bit AVR
VT sensor schematic
CT sensor schematic
GSM = GLOBAL SYSTEM FOR MOBILE COMMUNICATION
Also The FYP Working Timeline
The sensor works on the principal of hall effect
Its maximum current sensing capacity is 20A
of the sensors
Lets see sensors schematics
The Metering Unit
Lets see the programming