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Intelligent and energy efficient street lighting.

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by

Vidhisha Subramani

on 13 May 2014

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Transcript of Intelligent and energy efficient street lighting.

Intelligent and energy efficient LED street lighting.
Midterm Project Presentation by:
Vidhisha Subamani
(100906062, Section D, 151)



Under the guidance of :
D.K. Prajapati, Assistant Manager, Philips Electronics India Ltd
&
Namratha Pai, Assistant Prof., Dept. of EEE, Manipal Institute of technology.
Lighting is responsible for 19% of the world's electricity consumption and 1.9B tons of Carbon emissions annually.

Street lights
Daylight is fundamental to our lives, but at night we rely on street lights to illuminate our world.
This project focuses on the importance of having an efficient lighting system.
Current Status

At present street lighting commonly uses high-intensity discharge lamps, often high pressure sodium lamps. HID lamps are a type of electrical gas-discharge lamp which produces light by means of an electric arc between tungsten electrodes housed inside a translucent or transparent fused quartz or fused alumina arc tube. This tube is filled with both gas and metal salts.
High Pressure sodium vapour Lamps

In Vadodara light factory, 55 fixtures of SON-T(250W) and 8 fixtures of SON-T(400W) are being used.

Description:

SON-T lamps have a high luminous efficacy and a good colour appearance.
Longer economical life.
Excellent lumen maintenance.
Reliable, stable operation.


Technical data

Two types of luminaires are currently being used in VLF for housing these lamps.
1. Skyline - SGP325
2. Broadway plus-CRP330
Why LED ?

LEDs incur at least 40% energy savings and upto 80% when coupled with smart controls.
World wide potential savings will be,

128 billion euros in electricity cost/year


700 million tons of carbon emissions/year
(13.6 billion trees)


600 power plants spared

Methodology
MEASURE
Map process
Identify and implement quick wins
Collect data
Analyze measurement system
Determine process stability and process capability
Manage business risk and reconfirm charter
ANALYZE
Validate the process to verify the root causes using data
Quantify root causes with tests and data
Observe market trends
Suggest the best solution possible
IMPROVE
Improve the process and implement the best solution
Verify solutions with tests and data
Design implementation plan and communicate to organization
Track improved solution
CONTROL
Control the process to maintain the gains
Implement permanent control methods
Standardize control plan
Close out project, hand over to process owner
Validate final financial result
DEFINE
Describe the problem statement
Create a project charter
link project to business strategy
Validate financial forecast
Solutions Suggested...
Green Vision BRP 631
Greenline Duo
Green Vision BRP631 LED95/CW 95W 220-240V WB
Light output : 9500lm
Light module made of 40 LEDS
Cool white
Wide beam spread
Initial input power of 95W
Voltage range : 220-240V
Operated at 700mA
Net weight :13kg
Ta= 35C
Mounting height : 8-12m
Follows IP 66
LED light system will contain:
LED module (40 LEDs)
Optical system
Heat sink
Driver electrical component

Projects undertaken by Philips

Energy efficient LED lighting of national highways, Haldia,West Bengal, India.
Philips GreenVision LED street lighting solution was chosen by Haldia Development Authority for lighting up the roads on the main National Highway.

"Main customer requirement was that lighting should be very good, maintenance free but at the same time cost effective as well. Also the specifications demanded only the best product that meets both safety and performance standards to be selected. Keeping this in mind, we proposed GreenVision LED streetlights with features like very good & uniform lighting output, high energy savings and long life. We are happy that the customer is delighted with the lighting performance."
- Mr. Subhadeep Maitra, Philips Lighting Application Services (East India)
How to optimize the performance of these luminaires?

LEDs save upto 40% energy but when combined with
controls it can save upto 80% energy.
My project uses a 8051 micro controller to generate PWM signals which will
help control the intensity of a cluster of LEDs.
Hardware Requirements
Transformer
Bridge Rectifier
Voltage regulator
AT89S52 (microcontroller)
Transistor
MOSFET
Cluster of LEDs
Resistors
Capacitors
Software Requirements
Keil Micro vision
Protheus
8051 loader
8051 microcontroller (AT89S52)
Pin Diagram
#include<reg51.h>
sbit led= P2^0;
void main()
{
unsigned int a,ans,i,tcnt=0;
while(1)
{
ans=0xDC01;
for(i=0;i<10;i++)
{
for(a=0;a<100;a++)
{
TMOD=0x01;
TH0=0xDC;
TL0=0X01;
TR0=1;
led=1;
tcnt=TL0+TH0*256;
while(tcnt<ans)
{
tcnt=Tl0+TH0*256
}
led=0;
while(TF0==0);
TF0=0;
TR0=0;
}
ans=ans+0x0399;
tcnt=0;
}
for(a=0;a<125;a++)
{
TMOD=0x01;
TH0=0xDC;
TL0=0x01;
TR0=1;
Led=1;
while(TF0==0);
TF0=0;
TR0=0;
}

Working
230V is converted to 12V using a transformer
Transformer output is given to a bridge rectifier which converts AC to pulsating DC
Capacitive filter is used
filtered signal given to a voltage regulator which gives 5V output that is fed to 8051 micro controller
PWM signals through port 2 pin 0 is sent to transistor
Transistor helps in switching the MOSFET which drives the LED
Work schedule
Jan: Study of previously used lamps and luminaires, Projects by philips, Other factors involved.
Feb: LED technology, Advantages and disadvantages, DMAIC.
March: Energy details, Optimization, Sensor coding.
April: Hardware implementation of the sensor.
May: DIALUX modelling.

Conclusions
The project of PWM fed MOSFET controlled street light auto intensity sensor is a cost effective, eco friendly ans safest way to save energy. It clearly tackles the two problems the world is facing today, saving energy and disposal of incandescent lamps. With this project we can now save more than 40% of energy consumed by highways.
References
Acknowledgments
I would like to thank Mr. D.K. Prajapati si for helping to with the project and always motivating me to research about new things. I would also like to thank Ms. Namratha Pai ma'am for always helping me whenever I got stuck with the project.
I am thankful to the HOD of EEE dept. for guidance and support.
Organization Details
Company name: Philips Electronics India Ltd. , Vadodara
Unit: Electrical dept.
Supervisor name: D.K. Prajapati
Starting date: 06/01/2014
Duration: 4 months

THANK YOU !
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