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1、Advancements in Solar based LED Street lightNupur 1 Neha 1 Sangya gugri 1 Srishti mishra 1 Gulshan kr. dubey 2UG Student, Dept. of EIE, Galgotias College of engineering & technology, Uttar Pradesh India 1Associate professor, Dept. of EIE, Galgotias College of engineering & technology, Uttar Pradesh,
2、 India 2ABSTRACT: We are in the time where energy conservation & use of renewable resources has become a necessity. Thus requirement of methods which are not only highly efficient but also low in energy consumption has greatly increased to keep a check on pollution factor. Keeping this in mind this
3、paper focuses on solar based LED street light that uses automatic intensity controller with a solar tracker. This type of LED street light not only adjust itself according to the varying darkness but also keeps a track on overcharging, deep discharging, automatic restoration of charging ,protecting
4、the battery from the over/under voltage. It comprised of solar cell and electric energy stored from battery. The LED street lamp is lit at night automatically and changed into pulsed lighting in low power after the setting time and then turns off in daytime. Since only 20% of the total suns energy f
5、alls on earth and also the trajectory of sun keeps changing thus a solar tracker is used so as to track maximum suns energy.Keywords:Solar panel, charge controller, Intensity regulator, Solar tracker.I.INTRODUCTIONThesurface of the Sun has a temperature of about 5,800 Kelvin (about 5,500 degrees Cel
6、sius, or about 10,000 degrees Fahrenheit),as per the say of NASA, At that temperature, most of the energy the Sun radiates is visible and near- infrared light. At Earths average distance from the Sun (about 150 million kilometres), the average intensity of solar energy reaching the top of the atmosp
7、here directly facing the Sun is about 1,360 watts per square meter, according to measurements made by the most recent NASA satellite missions. This amount of power is known as the total solar irradiance. (Before scientists discovered that it varies by a small amount during the sunspot cycle, total s
8、olar irradiance was sometimes called “the solar constant.” Averaged over the entire planet, the amount of sunlight arriving at the top of Earths atmosphere is only one-fourth of the total solar irradiance, or approximately 340 watts per square meter.II. SOLAR TRACKERSolar tracking system1 is the mos
9、t appropriate technology to enhance the efficiency of the solar cells by tracking the sun. A microcontroller based design methodology of an automatic solar tracker is presented in thispaper. Light dependent resistors are used as the sensors of the solar tracker. The sun is the prime source of energy
10、, directly or indirectly, which is also the fuel for most renewable systems. Among all renewable systems, photovoltaic system is the one which has a great chance to replace the conventional energy resources.Solar panel directly converts solar radiation into electrical energy. Solar panel is mainly m
11、ade from semiconductor materials. Si used as the major component of solar panels, which ismaximum 24.5% efficient 2. Unless high efficient solar panels are invented, the only way to enhance the performance of a solar panel is to increase the intensity of light falling on it. Solar trackers are the m
12、ost appropriate and proven technology to increase the efficiency of solar panels through keeping the panels aligned with the suns position. Solar trackers get popularized around the world in recent days to harness solar energy in most efficient way. This is far more cost effective solution than purc
13、hasing additional solar panels 3.III. TECHNOLOGY TO ENHANCE POWER OUTPUT FROM SOLAR PANELIncreasing the cell efficiency, maximizing the power output and employing a tracking system with solar panel are three ways to increase the overall efficiency of the solar panel4. Improvement of solar cell effic
14、iency is an ongoing research work and people throughout the world are actively doing research on this. Maximizing the output power from solar panel and integrating solar tracking system are the twoways where electronic design methodology can bring success. Maximum power point tracking (MPPT) is the
15、process to maximize the output power from solar panel by keeping the solar panels operation on the knee point of P-V characteristics.A number of MPPT algorithms have been developed and employed around the world 5. MPPT technology only offers the maximum power that can be received from a stationary a
16、rray of solar panels at a particular time; it cannot, however, increase the power generation when the sun is not aligned with the system. Automatic solar tracker increases the efficiency of the solar panel by keeping the solar panel aligned with the rotating sun.Solar tracking is a mechanized system to track the suns position that increases power output of solar panel 30% to 60% than the stationary system 6. A few design methodology of sola
