Distribution Transformer Meter Reading System Using GSM : 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes

Forums

8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes :: Forums :: Project Development :: New Ideas regarding projects		<< Previous thread \| Next thread >>
Distribution Transformer Meter Reading System Using GSM


Moderators: Ajay, Junied , abbas1707, Arun Kumar V, pdi33, Shailesh NAYAK, ۞ TPS ۞, shyam, sashijoseph

Author

Post

SANATH EMBEDDED

Sat Nov 22 2008, 11:11PM

Registered Member #2561

Joined: Tue Jul 24 2007, 11:26PM

Posts: 156
Thanked 17 times in 15 posts

Hi Guyz,

I want to design a Real time system which continuously monitor the Distribution Transformer ( DTC) secondary winding output from which power lines are connected to Consumers and to transmit the real time information of power consumed on each powerline to the Power Distribution system using GSM which will be communicated to the PC where all the timely database of each line are stored.

In simple i want to make the the Distribution transformer system as fully automated system since till now reading of DTC Meter reading is taken manually by the power distribution System once in a month. Based on that Reading they will come to know the distribution losses or Power Theft from the DTC Meter to the each consumer end.

As of now I don't have much idea of Distribution Transformer and the parameter involved tn that. Only I know it's having primary winding and secondary winding and the secondary circuit in that converts 11KV input to 240V for the consumer.

So to start of with this project and get to know all the parameters involved in this I am thinking a silly idea to make the small protype with Step down trasformer of 240V to 12v/24V of 1 or 3 ampere which we use normally in our design. where the output will be connected to number of small parallel loads (which will be considered as each consumer lines in a actual system ). So I need to monitor the power consumed in each line and that information has to send it through GSM modem. I am much familiar with GSM and only the problem how to monitor each line and parameters involved in that.

Can any Embedded Guru's help me in this project.

With Regards,

Sanath Kumar
Mangalore/ Bangalore/Pune

Email: sanathmcx@rediffmail.com

" Embedded System is my Passion "

pdi33

Sun Nov 23 2008, 07:21AM

Registered Member #1329

Joined: Mon Jun 04 2007, 09:28AM

Posts: 774
Thanked 186 times in 181 posts

if I am not wrong , ur application seems to relate to measuring the energy consumption of the distribution line from the secondary of the transformer. So u can use the energy meter IC CS5460A . check its datasheet for connection to the 230V mains line to measure the current consumption and voltage monitoring. The rest of the project is already known to u

.
Do share ur results.

* inspired to develop,developing to inspire *

This post has been thanked 1 time

SANATH EMBEDDED

SANATH EMBEDDED

Sun Nov 23 2008, 10:14AM

Registered Member #2561

Joined: Tue Jul 24 2007, 11:26PM

Posts: 156
Thanked 17 times in 15 posts

Thanks pdi for the Reply

ya You are right . My application is to measure the energy consumption of distribution line given to the consumer from the secondary of the transformer.I will go through the details of Energy meter IC CS5460A.

But one more problem is like How can I monitor all the lines emerging out from that Distribution transformer. i think there might be around of minimum of 50 to 100 lines.Whether I need to monitor each line by making use of the above said chip to each line or is there any other alternative so that i can monitor all the lines with the single chip.

With Regards,

Sanath Kumar
Mangalore/ Bangalore/Pune

Email: sanathmcx@rediffmail.com

" Embedded System is my Passion "

pdi33

Sun Nov 23 2008, 10:37AM

Registered Member #1329

Joined: Mon Jun 04 2007, 09:28AM

Posts: 774
Thanked 186 times in 181 posts

hi sanath,
for ur application, monitoring the voltage would not be a problem as the lines coming out of the distribution txformer would be in parallel and u can sense voltage from any one line. But as far as the current is concerned, if u want to monitor the total current consumption, u must connect it in series with the main line before the distributing junction.
note that u may have to use a current transformer as the currents may exceed hundreds of amperes and a contactless type of current measurement would be unavoidable .C.T.s are practically available to measure a.c. currents even upto thousands of amperes.

Alternatively, if u want to monitor the current of each individual branch, then u have to invariably use that many current sensing inputs though the voltage sensing can be for a single line.

* inspired to develop,developing to inspire *

SANATH EMBEDDED

Mon Nov 24 2008, 02:12AM

Registered Member #2561

Joined: Tue Jul 24 2007, 11:26PM

Posts: 156
Thanked 17 times in 15 posts

Thankz PDI for the valuable reply

Might be at this point of time I am bit confused

with all these things since I don't have the much idea of Parameters involved in this. So let me analyze it more practically and also let me have the real view of Distribution transformer and meter attached to it.

So till that time

With Regards,

Sanath Kumar
Mangalore/ Bangalore/Pune

Email: sanathmcx@rediffmail.com

" Embedded System is my Passion "

SANATH EMBEDDED

Fri Nov 28 2008, 11:57PM

Registered Member #2561

Joined: Tue Jul 24 2007, 11:26PM

Posts: 156
Thanked 17 times in 15 posts

Hi Guyz

As i said me had a on sight view of 11KV Distribution transformer and DTC Meter.
The below fig shows the that conceptual view of Distribution transformer and Its DTC Meter

Here I need to monitor this DTC Meter values ( such as Power factor , Volatage at the load and total energy consumption) and has to communicate through GSM / GPRS which is the objective to acheive.

So I think there is no need to design the new DTC Meter by making use of above said chip or making use CTand PT .....Alternatively it can be done as designing the small module which will be attached to this DTC Meter as the one we are doing in prepaid energy meter system where we will be reading out the Pulse from the Meter ( from that LED Blinking point ) and by making use of Opto-isolator PC817 for isolation and will be given to the Controller Port Input.

Please let me know whether the above said method is feasible and also parameters involved in calculating Power factor, energy consumption , voltage at the current load

With Regards,

Sanath Kumar
Mangalore/ Bangalore/Pune

Email: sanathmcx@rediffmail.com

" Embedded System is my Passion "

SANATH EMBEDDED

Sat Nov 29 2008, 01:44AM

Registered Member #2561

Joined: Tue Jul 24 2007, 11:26PM

Posts: 156
Thanked 17 times in 15 posts

Hi guyz,

me forgot to give the specifications of Distribution transformer and DTC Meter

The Specifications of Distribution Transformer:

High Voltage ( HV Side) : 11000 V
Low Voltage ( LV Side) : 440V
Energy Rating : 630KVA
Mass of Oil : 650Kg
Total Mass : 2230Kg
Vol of Oil : 750 Liters/c
Cost : Around 5 Lakhs

Specifications of DTC Meter from L&T:

Type : Electronic Trivector Meter
connection : 3 Phase 4 wire
CT Ratio : 1000/5A
Voltage rating : 3 X 240V
Current rating : 100/5A
Cost : Around 15000 -/ Rs

With Regards,

Sanath Kumar
Mangalore/ Bangalore/Pune

Email: sanathmcx@rediffmail.com

" Embedded System is my Passion "