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Solar photovoltaic power generation system design, material characteristics and application
- May 11, 2018 -

The factors that need to be considered in the design of photovoltaic power generation systems:


1. Photovoltaic power generation system needs to consider the installation of environmental conditions and local solar radiation;


2. Consider the size of the total power that the system needs to bear.


3, the output voltage of the system should be designed as well as consider the use of DC or AC;


4, the number of hours the system needs to work every day;


5. In the case of rainy weather without sunlight, the number of days the system needs to work continuously;


6, the system design, also need to understand the load, the electrical is purely resistive, capacitive or inductive, and the instantaneous maximum current flow.


Household Photovoltaic Power Generation System The solar photovoltaic power generation system consists of solar cells, solar controllers, batteries (groups) and solar tracking control systems. If the output power is AC 220V or 110V, you also need to configure the inverter.


Solar panels are the core part of solar power systems and the most valuable part of solar power systems. Its role is to convert the sun's radiant power into electrical energy, or send it to a storage battery, or push a load to work. The quality and cost of solar panels will directly determine the quality and cost of the entire system.

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Raw material features:


Cell: High-efficiency (16.5% or more) monocrystalline silicon solar wafers are used to ensure sufficient power for solar panels.


Glass: Low-iron tempered suede glass (also called white glass) with a thickness of 3.2 mm, a transmittance of over 91% in the wavelength range of the solar cell's spectral response (320-1100 nm), and infrared light greater than 1200 nm Higher reflectivity. The glass is also resistant to solar ultraviolet radiation and the light transmittance does not decrease.


EVA: A high-quality EVA film with a thickness of 0.78 mm with an anti-ultraviolet agent, an antioxidant, and a curing agent is used as a sealant for a solar cell and a linker between glass and TPT. Has a high light transmittance and anti-aging ability.


TPT: The back cover of the solar cell—the fluoroplastic film is white and reflects sunlight, so the efficiency of the module is slightly improved, and because of its high infrared emissivity, it can also reduce the operating temperature of the module. It helps to improve the efficiency of the components. Of course, this fluoroplastic film first has the basic requirements of anti-aging, anti-corrosion, and air-tightness required for solar cell encapsulants.


Frame: The aluminum alloy frame used has high strength and is resistant to mechanical impact.


Solar Controller


The function of the solar controller is to control the working status of the entire system and play the role of overcharge protection and over-discharge protection of the battery. In areas with large temperature differences, qualified controllers should also have temperature compensation. Other additional functions such as light-controlled switches and time-controlled switches should be optional for the controller.


Photovoltaic systems (PVSystems) are power generation systems that convert solar energy into electrical energy, using photovoltaics. The photovoltaic power generation system is divided into an independent solar photovoltaic power generation system and a grid-connected solar photovoltaic power generation system.


It refers to the photovoltaic system that converts solar radiation energy directly into electrical energy using the photovoltaic effect of photovoltaic cells, including photovoltaic modules and associated components (BOS).


Independent solar photovoltaic power generation refers to the power generation mode in which solar photovoltaic power generation is not connected to a power grid. A typical feature is that a battery is used to store electricity at night.

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Home photovoltaic power generation system applications


First, the user solar power: (1) small power 10-100W range, for remote powerless areas such as the plateau, islands, pastoral areas, border posts and other military and civilian life, such as lighting, television, radio, etc.; (2) 3 -5KW family rooftop grid-connected power generation system; (3) Photovoltaic water pumps: Resolve deep-water well drinking and irrigation in areas without electricity: (4) Solar water purifiers: Solve drinking water problems in uncharged areas and purify water quality.


Second, transportation areas such as navigation lights, traffic / railway lights, traffic warning / sign lights, Yuxiang street lights, high altitude obstacle lights, highway / railway wireless telephone booths, unattended road class power supply.


Third, communications / communications areas: solar unmanned microwave relay station, fiber optic cable maintenance station, broadcast / communications / paging power system; rural carrier-phone photovoltaic systems, small communications machines, soldiers GPS power supply.


4. Petroleum, marine and meteorological fields: Cathodic protection solar power systems for petroleum pipelines and reservoir gates, life and emergency power sources for oil drilling platforms, marine detection equipment, and meteorological/hydrological observation equipment.


Fifth, the family lamp power supply: such as garden lights, street lamps, portable lights, camping lights, mountaineering lights, fishing lights, black light, tapping lights, energy-saving lamps, projection lamp family photovoltaic power generation systems.


Photovoltaic power station: 10KW-50MW independent photovoltaic power station, scenery (Chai) complementary power station, various large parking plant charging stations, etc.


Seventh, solar energy building will combine solar energy and building materials, making the future large-scale construction to achieve electricity self-sufficiency, is a major development direction in the future.


8. Other areas include: (1) Supporting cars: solar-powered cars/electric vehicles, battery charging equipment, automotive air-conditioners, ventilation fans, cold drink boxes, etc.; (2) Regeneration systems for solar hydrogen-fueled fuel cells; (3) Seawater Dilution equipment power supply; (4) satellites, spacecraft, space solar power stations.