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ARDUINO BASED
LOAD
MONITORING &
CONTROL SYSTEM
WITH MATLAB GUI
By
Krishnakumar R V
M.E Power Engineering and Management
Anna University Chennai
College of Engineering, Guindy
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
INTRODUCTION
One avenue through which today’s energy problems can be
addressed is through the reduction of energy usage in
households. The existing utility system only provides feedback
at the end of the month in the form of a bill and consumed
kilowatt hours (kWh).
The Arduino based load monitoring system keeps a track on the
household power with a MATLAB interface. The paper aims to
provide a clear picture of a home’s power consumption, and
through this data provide an estimate of amount to be paid as
bill.
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
OBJECTIVES
System requirements
Accurately collect a house’s total power consumption
safely, and with a relatively fast update rate.
Transmit the information back to a base station to be
represented visually to a user.
Provide easy user control of the devices
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
Block diagram
MATL
AB
GUI
ARDUINO
DATA
ACQUISITI
ON BLOCK
CONTROL/MONITOR
ING WINDOW
RELAY
EB MAINS
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
MEASUREMENT
(CURRENT)
HALL CURRENT SENSOR
Principle: HALL effect
• Magnetic field is produced
by current flowing
through it.
• Charge carriers are displacement
• Voltage proportional to current is produced
“HALL VOLTAGE”
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
Measurement (voltage)
BRIDGE RECTIFIER WITH C FILTER
• AC line voltage stepped down from 230V to 9V
• Rectified by diodes
• Capacitor filter smoothens the wave
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
Arduino uno
• Sensor outputs to analog pins
• ADC converts received signals into a 10bit digital value
• The 10 bit value is scaled to 5V
Read value=(ADC value/1023)*5
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
Hardware
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
Arduino & matlab interface
why???
• Arduino only collects the line values.
• There should be simple a user interface.
• So, MATLAB GUI is one of the best software for data
acquisition and user interface.
• Also different curves provide an easy understanding of
the scenario.
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
Arduino & matlab interface
• Line data from arduino - transmitted to MATLAB
program on PC through USB serial port.
• Baud rate is 9600.
• The input values are stored in various MATLAB
variables.
• The variables current ,voltage and power consumed are
plot against time.
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
Matlab gui
• GUI window contains buttons for various operations.
• Each button has a callback function defined to perform
certain tasks
• The GUI window provides an easy access to various
modes of operation of monitoring
• The GUI window also provides buttons to switch on and
off the loads.
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
Functions in gui
• Data logger
• Stop reading
• Billing
• Load on & off
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
Gui window
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
DATAAcquisition
• Data is read by ATMEGA328
• Time varying signal from sensor is converted to digital
by 10bit ADC
• The voltage is then scaled to 5V
• The actual values are calculated using sensitivity of the
sensors
• These values are stored in a text file for future reference
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
DATAACQUISITION
(CONTD…)
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
Text file
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
Calculations
• Hall current sensor
sensitivity=100 mV/A
Therefore, scaling factor=10
offset voltage=0.5*Vcc V
VCC =Supply voltage to the sensor module
line current(I)=((ADC*5/1023)-2.5)*10 A
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
Calculations (contd…)
• Bridge rectifier
sensitivity=21e-3
scaling factor=46
line voltage(V)=(ADC*5/1023)*46 V
• Energy consumed
power(P)=V*I*cosø W
energy=P*t kWh
t time in hours
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
Load control
• Buttons are provided for load control in GUI
• Allows user to switch the loads on and off
• This is implemented to have a control system
• The button’s call back function sends a signal to Arduino
and the load is switched on & off
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
Billing
• The bill is generated by pressing BILL button
• The function uses TNEBs rate slab
• Domestic tariff slab is included in the function
• The amount is calculated and displayed in a dialog box
• This is coded in such a way that it meets the need of the
user
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
FUTURE SCOPE???
• Aims at providing a wireless transmission of data
Wireless transmission
GSM(Global System for Mobile communication )
IEEE 802.11 (wifi)
IEEE 802.15.4 (zigbee)
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
conclusion
Thus the work suggests a method for continuous load
monitoring and control system which is optimized using
MATLAB GUI
The same can also be implemented using Process IDE
which is also used for data acquisition and processing
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
references
[1]non intrusive load management
http://people.ece.cornell.edu/land/courses/eceproje
tsland/STUDENTPROJ/2009to2010/csm44/RPT.pdf.2010
[2] Arduino.
http://arduino.cc/en/Main/ArduinoUNO.2015
[3]MATLAB GUI
http://in.mathworks.com/discovery/matlab-gui.html
[4] Wayne Storr. Full-wave Rectifiers.
http://www.electronicstutorials.ws/diode.html.2010
[5] Rod Elliot. Precision Rectifiers.
http://sound.westhost.com/appnotes/an001.htm. 2009
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai
6/22/2017
DeptofPowerEngg&Mgmt,AnnaUniversity
Chennai

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Load monitoring

  • 1. ARDUINO BASED LOAD MONITORING & CONTROL SYSTEM WITH MATLAB GUI By Krishnakumar R V M.E Power Engineering and Management Anna University Chennai College of Engineering, Guindy 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 2. INTRODUCTION One avenue through which today’s energy problems can be addressed is through the reduction of energy usage in households. The existing utility system only provides feedback at the end of the month in the form of a bill and consumed kilowatt hours (kWh). The Arduino based load monitoring system keeps a track on the household power with a MATLAB interface. The paper aims to provide a clear picture of a home’s power consumption, and through this data provide an estimate of amount to be paid as bill. 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 3. OBJECTIVES System requirements Accurately collect a house’s total power consumption safely, and with a relatively fast update rate. Transmit the information back to a base station to be represented visually to a user. Provide easy user control of the devices 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 4. Block diagram MATL AB GUI ARDUINO DATA ACQUISITI ON BLOCK CONTROL/MONITOR ING WINDOW RELAY EB MAINS 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 5. MEASUREMENT (CURRENT) HALL CURRENT SENSOR Principle: HALL effect • Magnetic field is produced by current flowing through it. • Charge carriers are displacement • Voltage proportional to current is produced “HALL VOLTAGE” 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 6. Measurement (voltage) BRIDGE RECTIFIER WITH C FILTER • AC line voltage stepped down from 230V to 9V • Rectified by diodes • Capacitor filter smoothens the wave 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 7. Arduino uno • Sensor outputs to analog pins • ADC converts received signals into a 10bit digital value • The 10 bit value is scaled to 5V Read value=(ADC value/1023)*5 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 9. Arduino & matlab interface why??? • Arduino only collects the line values. • There should be simple a user interface. • So, MATLAB GUI is one of the best software for data acquisition and user interface. • Also different curves provide an easy understanding of the scenario. 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 10. Arduino & matlab interface • Line data from arduino - transmitted to MATLAB program on PC through USB serial port. • Baud rate is 9600. • The input values are stored in various MATLAB variables. • The variables current ,voltage and power consumed are plot against time. 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 11. Matlab gui • GUI window contains buttons for various operations. • Each button has a callback function defined to perform certain tasks • The GUI window provides an easy access to various modes of operation of monitoring • The GUI window also provides buttons to switch on and off the loads. 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 12. Functions in gui • Data logger • Stop reading • Billing • Load on & off 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 14. DATAAcquisition • Data is read by ATMEGA328 • Time varying signal from sensor is converted to digital by 10bit ADC • The voltage is then scaled to 5V • The actual values are calculated using sensitivity of the sensors • These values are stored in a text file for future reference 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 17. Calculations • Hall current sensor sensitivity=100 mV/A Therefore, scaling factor=10 offset voltage=0.5*Vcc V VCC =Supply voltage to the sensor module line current(I)=((ADC*5/1023)-2.5)*10 A 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 18. Calculations (contd…) • Bridge rectifier sensitivity=21e-3 scaling factor=46 line voltage(V)=(ADC*5/1023)*46 V • Energy consumed power(P)=V*I*cosø W energy=P*t kWh t time in hours 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 19. Load control • Buttons are provided for load control in GUI • Allows user to switch the loads on and off • This is implemented to have a control system • The button’s call back function sends a signal to Arduino and the load is switched on & off 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 20. Billing • The bill is generated by pressing BILL button • The function uses TNEBs rate slab • Domestic tariff slab is included in the function • The amount is calculated and displayed in a dialog box • This is coded in such a way that it meets the need of the user 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 21. FUTURE SCOPE??? • Aims at providing a wireless transmission of data Wireless transmission GSM(Global System for Mobile communication ) IEEE 802.11 (wifi) IEEE 802.15.4 (zigbee) 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 22. conclusion Thus the work suggests a method for continuous load monitoring and control system which is optimized using MATLAB GUI The same can also be implemented using Process IDE which is also used for data acquisition and processing 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai
  • 23. references [1]non intrusive load management http://people.ece.cornell.edu/land/courses/eceproje tsland/STUDENTPROJ/2009to2010/csm44/RPT.pdf.2010 [2] Arduino. http://arduino.cc/en/Main/ArduinoUNO.2015 [3]MATLAB GUI http://in.mathworks.com/discovery/matlab-gui.html [4] Wayne Storr. Full-wave Rectifiers. http://www.electronicstutorials.ws/diode.html.2010 [5] Rod Elliot. Precision Rectifiers. http://sound.westhost.com/appnotes/an001.htm. 2009 6/22/2017 DeptofPowerEngg&Mgmt,AnnaUniversity Chennai