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Introductionwww.medors.inAs the name implies,Photo + voltaic = PhotovoltaicThus, it is a technology that converts sunlight (photo) into electricity (voltaic).PV array constitutes of a number of photovoltaic modules or panels that converts solar radiations into direct current.A small photovoltaic is capable enough to give power to single house.PV works in combination of various other devices to give power for practical usage.
Working Principlewww.medors.inThe main principle is that conversion of light energy in form of sun rays into electrical energy in form of electrical power.
Accessories Associated with PVwww.medors.in The main accessories connected with photovoltaic system to supply electricity for practical use are:DC to AC ConverterRacking system for modules supportWiring and connectionsMounting for componentsCredit revenue grade meterSolar irradiant sensors, MPPT, GPS trackerBattery system and chargerEnergy management software
Components of Solar Photovoltaicwww.medors.in There are various components involved in the manufacturing of the solar photovoltaic . The list of them are as follows:
Thin sliced silicon crystals for making solar cells.Amorphous silicon cell for degradation removal.Assembled laminate (wired solar cells) to form solar panel.Solar panels linked in parallel
Continuedwww.medors.in to make photovoltaic module/array.Mounting system for modules assembling on ground, roof or pole. Tracker, Inverter components for GPS tracker as well as conversion of DC to AC current. Charge controller as control components. These components combine together in an organized fashion to get a solar photo voltaic.
Working of Solar Photovoltaicwww.medors.in
Steps involved:www.medors.inThe sun rays falls over the PV array converted into direct current (DC) by the action of silicon cells present in panel.To convert DC to AC , DAC converter is used as an intermediate inverter.PV generation meter is used to accumulate energy units bi-directionally.Now, AC power goes to household meter for domestic uses.The power supply continues till sun rays falls on the panel.
Advantages Of Solar PVswww.medors.inSolar PVs are environment friendly as these do not produce any green house gas like CO2.It uses easily available & free source of energy that is sun.Affordable setup of generationFor domestic usage, setups are easy to install on roof tops. Used in both centralized and distributed power generation.Easily expandable and transportable.Provide long and lifetime service.
Disadvantages of Solar PVswww.medors.inProduction limited to sunny days, but what about night and cloudy days.Unreliable systems.Various additional accessories increases the cost of implementation.Surface area requirement is also a limiting factor.Due to diffuse nature of sunlight, makes it less efficient system.Slow process of electricity generation.
Applications of Solar PVswww.medors.in The solar PVs have their use in wide range of areas like:
In water pumps that are beyond the contact of power lines.For green house ventilations, fans operate with solar PV.In sub urban homes for electricity purpose.In power plants also , solar photo voltaic are used.Solar vehicles is one of best example of its practical usage.