1. WIRELESS ENERGY MEASUREMENT SYSTEM
SUBMITTED BY –VINEET SINGH
MOHIT TYAGI
RAJEEV CHAURSIYA
VISHWJEET KR.JEET

2. INTRODUCTION
This project proposal describes the basic requirements for a device that will be integrated into the Attested Metering Project. The main goal of the project is to improve the reliability and stability of the electric power grid and securely empowering consumers in the energy market. One main structure of this project is to design an advanced metering system that can at least be read remotely. However, in the future, the advanced meters will include many other capabilities beyond this basic requirement. As an example, advance meters could have the capability of not only sending useful information about the power usage of a certain appliance, but also receive control demands to able or disable the power flowing to the appliance.
The goal of this project is to design an advanced metering system that has the capability of remotely sending information about the power flow in any particular power line.

3. OBJECTIVE
To understand, analyze, design and develop a wireless energy meter system which provides both the suppliers and the consumers with better services regarding meter billing

4. FEATURES * Small, inexpensive, and easy to implement.
* Advance design allows for installation in new and existing homes.

5. BLOCK DIAGRAM

6. BLOCK DISCRIPTION CIRCUIT BOARD
The circuit board will contain the Rogowski Coil, Power Measurement chip, Microcontroller (with imbedded RAM), Wireless Chip, and the Antenna. These items will be designed on a PCB board, using the Eagle software

7. ROGOWSKI COIL
The Rogowski coil is an electrical device for measuring alternating current or high speed current pulses. It consists of a helical coil of wire with the lead from one end returning through the centre of the coil to the other end, so that both terminals are at the same end of the coil. The whole assembly is then wrapped around the straight conductor whose current is to be measured. Since the voltage that is induced in the coil is proportional to the rate of change of current in the straight conductor, the output of the Rogowski coil is usually connected to an electrical integrator circuit in order to provide an output signal that is proportional to current. In our project, we will be using this to send accurate measurements to the Power measurement chip which will calculate the RMS voltage and current values.

8. POWER MEASURMENT SYSTEM
This chip (Atmel ADE7753 Single Phase Multifunction Energy Metering IC) will retrieve the necessary packets of information from the Rogowski Coil. Then it will convert the information to a DSP setting, so the information can be sent to the Micro-controller through a Bus. The chip will do a simple calculation on active and reactive power consumed by the
appliance.

9. MICRO-CONTROLLER (WITH IMBEDDED RAM)
The Micro-controller (Atmel ATmega2560 Microcontroller) will have an imbedded
Random Access Memory to retrieve or store any necessary information. Also the
Microcontroller will automatically activate or deactivate the Power Measurement and Wireless
chip when the user sets the system to be turned on. The micro-controller will be programmed
with a C++ code on Zigbee development software.

10. WIRELESS CHIP
The wireless chip (Atmel AT86RF230) will be activated or deactivated depending on the on/off signal sent by the Micro-Controller. This chip will convert the necessary information that
has been analyzed through the Power Measurement Chip and Micro-controller to a Radio signal so it can be ready to send the information to the Modem through the Antenna

11. ANTENNA
The Antenna will be imbedded onto the circuit. It will be using an analog RLC IEEE standardized antenna model with the range 90 – 100 ft. Although we will initially try to design the antenna, if we find the performance of our imbedded antenna is significantly weaker than standard embodied antenna purchased from the shop, we will end up using the antenna (ANT 2.4GHZ SNAP-IN 1.0MM PCB) provided from the shop to maximize the performance.

12. VERIFICATION 1. PERFORMANCE REQUIREMENT
This device will need to perform accurately and efficiently in a home environment. The range of the wireless communication will need to be sufficient enough for a modem to obtain the information within 50 ft of the device regardless of obstacles. This information will include active and reactive power measurements. This device will need to operate efficiently so the batteries will be sufficient for at least a year

13. 2. TESTING PROCEDURE Microcontroller: Communication:
In order to test the microcontroller, we will retrieve the RAM values after storing some test points from the power measurement than double check the information to see if the microcontroller was performing precisely.
Communication:
The communication will be tested by connecting the RF transmitter to a function generator, sending a signal with a known frequency, and verifying that the correct signal is
received by the RF receiver using an Agilent E8357A VNA
an Agilent A oscilloscope. While using the Agilent E8357A VNA meter, we will check to see if the smith chart

14. correlates to the results we were expecting for a good antenna.
Power Measurement:
The measurement obtained within the microcontroller can be compared with
measurements obtained by other more conventional ways of obtaining power information of a
line, these could include the use of a multi-meter, or less accurately using the line rated values

15. 3. Tolerance Analysis
Due to some discrepancies in the model, we are not sure if the sample points we will retrieve from the Rogowski coil will be the same for every minute of data points. Hence, we would not be able to state if the reactive and active power is exact for that minute. However, we would be able to confirm within a 5% margin of error the value will be precise. Also for the Antenna, there will be some noise factor while propagating the information through air. Hence, theoretically when the modem obtains the values from the Antenna but will be unlikely.

16. Atmel ATmega2560 1
Microcontroller
Atmel ADE7753 Single
Phase Multifunction
Energy Metering IC
Atmel AT86RF230 Bi-
Directional Transfer
ANT 2.4GHZ SNAP-IN
1.0MM PCB
Antenna
PCB Board (10x10 2 layer)
PCB
Panasonic AAA batteries 2
Power Supply
Rogouski Coil 3
Coil

17. THANK YOU