ENERGY MANAGEMENT SYSTEM IN THE SMART HOME

Ciprian PAUNESCU Lucian TOMA Constantin BULAC Mircea EREMIA

Power Engineering Faculty, University Politehnica of Bucharest, Romania

Home energy management Architecture

Parts:

Home controller mini PC

Wireless router

Modul de comand

RC power sockets

Protocols:

TCP/IP : meter - PC

USB : PC- PLC

RF 433 MHz: PLC consumers (HAN)

The smart home energy management simulator

Hardware architecture

1 - Home controller: Raspberry PI

4 - RC power sockets: Home Easy HE801S

2 - PLC: MicroDev D4-USB

3 - Wireless router: TP-link

Home controller - Raspberry PI

Specifications

CPU: ARM la 700 MHz RAM: 512MB Ethernet interface Video HDMI port Stereo audio interface 2 USB V2.0 ports

The Raspberry PI simulator is a programmable board and hosts the simulation and control software under the Linux platform. USB port; Ethernet port;and optional for home-confort: HDMI port; Audio interface.

MicroDev D4-USB PLC command module

This PLC is compliant with all project requirements, i.e.:

LCD display to provide the main parameters (consumption, energy tariff, etc.);RF-433MHz module (for remote control of the loads, sensors for data acquisitions,

etc.);Inputs for various local sensors (overvoltages, overloads, floods, etc.);Outputs for the SSR.

Components:

1. microcontroler2. USB port3. digital inputs

4. relays5. relay outputs

6. LCD port7. LCD8. RF 433 MHz module9. RF antenna module

Choosing for the HAN network, 433 MHz frequency we can use the equipments which are available on the existing market such us RC power socket, wireless temperature sensors which uses that frequency an can be easily integrated in the system. There are some cases when these equipments are already installed.

HAN network - loads

RC Power Socket for loads remote control

These sockets have the address of the area.Formed in binary on 5 bit and an unique identifier which can take values from A to E. This way we can make 2^5=32 areas which can give us a total number of 160 sockets.

For a bigger number of RC sockets we can use ZigBee protocol instead of 433 MHz frequency.

Command signal

Software architecture

Functional modules of the application

Software can be divided in three parts

Home controller :- SO - Raspbian (Debian GNU/Linux);- PHP for the main procesing program;- MySQL pentru salvarea datelor.

PLC:- MPLAB X IDE bootloader;- Pinguino IDE main software.

User interface (Laptop,Smartphone,TV)- HTML;- CSS;- JavaScript.

User interface

Laboratory hardware smart home simulator

1. Smart meter;2. Bipolar fuses, from left to

right: S1, S2, S3 and S4;3. MicroDev PLC;4-5. Solid State Relays (SSR) 40 A;6-7. Regular plugs 1 and 2,

connected to S2 and S3 through SSR1 and SSR2;

8-10. Plugs 3 to 5, connected to fuses S4, with control on the addresses 11111A, 11111B, and 11111C;

11.Load 1, 100W, connected to plug 1;

12-14. Loads 2 to 4, 60W, connected to plugs 2, 4 and 5;

15. Plug to supply the router and the microcontroller to fuse S1;

16. Home controller17. Wireless router

Consumer Price ON (Lei/kWh) Price OFF (Lei/kWh)

Water heater 0.25 0.75Electric oven 0.5 0.7Air conditioner 0.3 0.9Washing machine 0.4 0.85

Simulations

Conclusions

HES will be the future in home metering, management,billing and energy customer information

Building a hardware HES is quite easy and cheap; it isexpected that the price will lower as the business willexpand

Although no clear legislation was issued so far aboutsmart metering in homes, HES can be implemented ifcompatible hardware is used (capable ofcommunicating with various protocols)