Home Utility Management System
E-POWER
Who is E-Power?
• Tony Galecki– Computer Engineer
• Wesley Baker – Computer Engineer
• Vinh Huynh– Electrical Engineer
• Brian Frederick– Electrical Engineer
• Sergio Espinoza– Electrical Engineer
• Ben Walpole– Electrical Engineer
Have You Asked Yourself?
• Why is my electricity bill so high?
• Why do we keep having rolling blackouts?
• Is SDGE ripping me off?
E-POWER HAS THE ANSWER
Why E-POWER?
• Utilities companies are behind with construction of power facilities to serve peak demand
• Increased power consumption means rolling blackouts
• 96% of people surveyed said they would use a home power monitoring system to conserve power
E-Power Home Utility Management System
• Measure power consumption of an appliance• Display power consumption cost over time• Simple user interface via internet• Connect/disconnect option for each device• Assist in reducing peak power demand
E-Power Home Utility Management System
How does it work?
Easy as 1-2-3ish
1. Turn on central hub/web server
2. Plug appliance into wall unit
3. Log onto personalized web page
4. Enjoy your new found power
Tell Me More!!
Overall System Comprised of Three Subsystems
Outlet SensingUnit
Central Hub/Web Server Computer
Outlet Sensor Data
Wireless Communication Usage InformationVia Internet
· Outlet Current Sensing Unit· Wireless Data Transmission· Data Processing on embedded web server
Outlet Current Sensing
Outlet Current Sensing Simplified Block Diagram
Hall Effect
Sensor
Zigbee Transceiver
Amplifier
Relay
µcontroller
Device
Power Supply
Hall Effect SensorSensor Output
Sensor Amplification
Power Supply
Gain Resistor
Vout
Vin -
Vin +
Amplifier Output
Sampling amplifier output for peak value
• Low-Power high speed µC
• 10 bit A/D converter
A/D Converter in A/D Converter out
A/D Converter
Data Transmission
Zigbee 802.15.4
• Compatibility• Auto configuration• Mesh network• Low Power• Security
Device 2 Device 3
Controller
Device 1
Zigbee Home Network Overview
Data Processing and Output
Embedded Server
• Real time operating system
• Internet accessible• Process and store
data• Output data to a
dynamic web application
Data Processing Flow Diagram
Incoming Node Data
Check Address to Determine Node
Output to Web Application Upon User Request
Store in Database for Processsing
User Interface
User Interface
Budget
• Total cost to date $232.04
• Total amount available $17.96
• Main Allocations1. Web Server $99.002. Zigbee $9.953. µcontroller $5.17
CostSurplus
Management System Summary
• Measure power consumption of an appliance
• Display power consumption cost over time
• Simple user interface via internet
• Connect/disconnect option for each device
• Change your power consumption behavior
How Can I Get One?
• Base Package System Includes– 1 Main Hub and 3 Outlet Units $250.00– Each Additional Outlet $50.00
Special pricing for Mother’s Day!
Save an additional 15%
Questions?