Smart Meter
- 1. Smart Meter Design for Smart Grid Design Engineer: Aftab Hussain – 2008-NUST-BEE-467 Project Advisor: Dr. Tauseef Tauqeer, SEECS NUST
- 2. Project Description Design a monitoring tool that measures the power consumption of an electrical device and transmits the data to the power supplier company through GSM modem. It also includes automatic supply of power according to the need of the users by switching the relays.
- 3. Domain Model USER DEVICE Measure LCD RS232 GSM Modem LOAD GSM Modem RS232 Microcontroller Relay1 Relay2 Relay3 INV1 INV2 INV3 Transmit Receive
- 4. The Smart Meter Implemented 1. Purely with PIC Microcontroller 2. Through the SPI interfacing of PIC with CS5463 3. Adding the prepaid and smart grid functionality
- 5. Meter with PIC MicrocontrollerIP+ 4 IP- 5 VIOUT 3 VCC 1 GND 2 U2 ACS755XCB-050 MCLR/VPP 1 RA0/AN0 2 RA1/AN1 3 RA2/AN2/VREF- 4 RA3/AN3/VREF+ 5 RA4/T0CKI 6 RA5/AN4/SS/LVDIN 7 RE0/RD/AN5 8 RE1/WR/AN6 9 RE2/CS/AN7 10 OSC1/CLKI 13 RA6/OSC2/CLKO 14 RC0/T1OSO/T1CKI 15 RC2/CCP1 17 RC3/SCK/SCL 18 RD0/PSP0 19 RD1/PSP1 20 RD2/PSP2 21 RD3/PSP3 22 RD4/PSP4 27 RD5/PSP5 28 RD6/PSP6 29 RD7/PSP7 30 RC4/SDI/SDA 23 RC5/SDO 24 RC6/TX/CK 25 RC7/RX/DT 26 RB0/INT0 33 RB1/INT1 34 RB2/INT2 35 RB3/CCP2B 36 RB4 37 RB5/PGM 38 RB6/PGC 39 RB7/PGD 40 RC1/T1OSI/CCP2A 16 U1 PIC18F452 VCC AC1 TR1 TRANSFORMER BAT1 16V U4 OP1P R1 10k +88.8 ACAmps R6 9k R4 1k +88.8 +88.8 AC Volts +88.8 AC Volts R20 50 Zero Cross Detector C1 30uF D7 14 D6 13 D5 12 D4 11 D3 10 D2 9 D1 8 D0 7 E 6 RW 5 RS 4 VSS 1 VDD 2 VEE 3 LCD1 LM016L A B C D RXD RTS TXD CTS
- 6. voltage Current Algorithms Take analog input and give it to the analog input pin AN0 The ADC samples the input and we take the peak value Divide this value by sqrt(2) Multiply this peak value with the resistor and transformer ratio Take analog input and give it to the analog input pin AN1 The ADC samples the input and we take the peak value Divide this value by sqrt(2) Multiply this peak value with the transformer ratio
- 7. Power factor 1. Check for voltage cross zero from negative to positive 2. Timer T starts (T) 3. Timer T starts ( T2) 4. Check for current cross zero from negative to positive 5. Timer T stops 6. Check again for voltage cross zero from negative to positive 7. Timer T stops 8. Phase φ = ( T2 / T) * 3600 9. Get cos φ
- 8. Simulations