Smart Energy Meter look similar to electronic meters but they are better than both the electro mechanical meters and the electronic meters in the sense that in addition to providing the usual services of a regular meter, they are connected back to the utility through the PLC . It means that there is no need of an official from the utility (which provides you electricity) to come at your doorstep and take the meter readings. This can be achieved by the use of microcontroller unit that continuously monitors and records the energy meter readings in its permanent memory location. Smart meters can also be used to shut off service to households and commercial establishments that don‟t pay their bills.The size of smart meters and traditional meters is same and smart meters are digital . Smart Energy Meter measures more detailed readings than KWhr so that utility can plan the expansion of network and power quality . The Smart Energy Meter is designed so that it measures voltage and load currents by the use of voltage and current sensors instead of potential and current transformers and then feeds these values of voltage and current into energy metering IC.Initial indications from deployents globally indicate that putting in place monitoring systems such as smart meters prevents loss due to electricity theft. It can also lead to lower power consumption as consumers who were earlier using „free‟ power reduce it and resort to using only as much as they can pay for legally. Also smart meters ease the burden on customers who regularly pay bills by billing them very accurately and often less. GSM and bluetooth technologies are both incorporated in this system. GSM allows data transfer between the energy meter and consumer on a regular basis. Here the bill details are send to the consumer in every two months.Bluetooth provides the facility of accessing the bill details according to their requirement.
objectives:
- Real time monitoring of energy meter by KSEB through Power line carrier(PLC) Communication
- Communication with consumer through GSM and Bluetooth
- Daily updation of electricity bill in the display
- Disconnection and reconnection of consumer supply by KSEB according to the bill payment.
- Power theft control
BLOCK DIAGRAM
CIRCUIT
PROGRAM
/*—————————————————–
lcd-
D7 -PIN0 E -PIN4
D6 -PIN1 RS -PIN5
D5 -PIN2
D4 -PIN3
RELAY-PIN10
CT 1————-A0-
CT 2————-A1-
TRANSFORMER——A2-
—————————————————–*/
int c1,c2,v,x,p=0,t=0,y=2,z=0;//ct1,ct1,trans,theft,power,unit,amt
u8 u=0;
char g[5],l;
void setup()
{
pinMode(10,OUTPUT);
pinMode(11,OUTPUT); pinMode(12,OUTPUT); pinMode(21,OUTPUT);
digitalWrite(11,LOW); digitalWrite(12,LOW); digitalWrite(21,LOW);
Serial.begin(9600);
lcdinit ();
digitalWrite(10,HIGH);
delay(1000);
digitalWrite(10,LOW);
lcd.setCursor(0,1);
lcd.printf(“u=%d”,u);
}
void loop()
{
lcd.clear();
//time();
voltcurrntlcd();
theft ();
p=((c2*v)/100) + p;
serial1();
lcd.setCursor(9,1);
z=u*y;
lcd.printf(“Rs=%d”,z);
lcd.setCursor(0,1);
lcd.printf(“u=%d”,u);
lcd.setCursor(3,1);
lcd.printf(“t=%d”,t);
delay(100);
t=t+1;
if(p>13000)
{
u=u+1;
p=0;
//z=u*y+z;
//bluetooth();
}
if(t>600)
{
digitalWrite(11,HIGH);
Serial.write(‘A’); del();Serial.write(‘M’); del();Serial.write(‘T’); del();Serial.write(‘-‘); del();
z=u*y;
adctoascii();
Serial.write(g[2]); del();Serial.write(g[3]); del();Serial.write(0xd); del();
u=0;
t=0;
//z=0;
digitalWrite(11,LOW);
message();
bluetooth();
}
}
void bluetooth(void)
{
digitalWrite(21,HIGH);
Serial.printf(“amt=”);
Serial.println(z, DEC);
Serial.write(0xd);//ENTER
digitalWrite(21,LOW);
}
void message(void)
{
digitalWrite(12,HIGH);
Serial.printf(“AT+CMGF=1;”);//TEXT MODE
Serial.write(0xd);//ENTER
delay(1000);
Serial.printf(“AT+CMGS=”);
Serial.write(0X22);
Serial.printf(“9526418115”);//NUMBER
Serial.write(0X22);
Serial.write(0xd);//ENTER
delay(1000);
Serial.printf(“Rs-“);Serial.write(g[2]); Serial.write(g[3]);
Serial.write(0x1a);
del ();
digitalWrite(12,LOW);
}
void del (void)
{
delay(500);
}
void serial1(void)
{
if(Serial.available()>0)
{
l=Serial.read();
//Serial.write(l);
if(l==’k’) //tarif
{
while(!(Serial.available()>0));
l=Serial.read();
y=(l-0x30);
}
if(l==’d’){
digitalWrite(10,HIGH);
}
else if (l==’c’)
digitalWrite(10,LOW);
}
}
void lcdinit (void)
{
//LCDPINS—– RS -PIN5 E -PIN4 D4 -PIN3 D5 -PIN2 D6 -PIN1 D7 -PIN0
lcd.pins(5, 4, 3, 2, 1, 0, 0, 0, 0, 0); // RS, E, D4 ~ D8
lcd.begin(16, 2); // set up the LCD’s number of columns and rows:
lcd.clear();//CLEAR DATA IN LCD
lcd.clear();
}
void voltcurrntlcd (void)
{
lcd.setCursor(0,0);
c2 = analogRead(A1)*10; // energy meter
delay(10);
lcd.printf(“I=%d”,c2);
c1 = analogRead(A0)*10;
delay(10);
lcd.setCursor(7,0);
v = analogRead(A2)*8/10;
delay(10);
lcd.printf(“V=%d”,v);
}
void theft (void)
{
x=c1-c2;
if(x>200)
{
digitalWrite(11,HIGH);
Serial.write(‘t’); del();Serial.write(‘h’); del();Serial.write(‘e’); del();
Serial.write(‘f’); del();Serial.write(‘t’); del();
Serial.write(‘-‘); del();
Serial.write(‘n’); del();Serial.write(‘0’); del();
Serial.write(‘-‘); del();Serial.write(‘7′); del();
digitalWrite(11,LOW);
}
}
void adctoascii (void)
{
g[4]=’ ‘; //LSB section
g[3]=(z%10)+0x30;
g[2]=z/10%10+0x30;
g[1]=z/100%10+0x30;
g[0]=z/1000+0x30;//MSB section
}