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Composition And Principles Of Photovoltaic Systems

Author: Source: Datetime: 2016-09-13 07:48:13
Solar power portable generator system has the following features:
① no moving parts, no noise;
② no air pollution, no waste water discharge;
③ process which does not burn fuel;
④ repair and maintenance simple, low maintenance costs;
⑤ operation reliability, good stability;
⑥ long life solar cells as a key component of crystalline silicon solar battery life of up to more than 25 years;
⑦ easily expand the scale of power generation necessary.

Photovoltaic system is widely used, the basic form of the PV system applications can be divided into two categories: independent power systems and grid systems. The main application areas in space, aircraft, communications systems, microwave relay station, power parallax turret, photovoltaic water pumps and the lack of electricity without electricity household power supply. With the development of sustainable technologies and world economic development needs coriander, developed countries have also started to promote the city solar power generation, mainly construction Residential Rooftop photovoltaic systems and MW-class large-scale centralized grid system, at the same time in transport and urban lighting, etc. to promote the use of solar PV systems.

PV system size and application forms vary, such as the size of the system span, small 0.3~2W solar garden lights, large MW scale solar photovoltaic power plants. Application forms are also varied, with at home, transportation, communications, space applications and many other fields can be widely used. Although PV systems vary in size, but its structure and working principle is basically the same. Figure 4-1 shows a typical DC load supply solar photovoltaic system schematic. Which contains several major photovoltaic system components.

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① PV modules by the square solar cell module (also known as photovoltaic modules) in accordance with system requirements strings connected in parallel, in the sunlight to convert solar energy into electrical energy output, which is the core component of solar power generator systems.

lifePo4 batteries electric energy generated by the solar cell module stored when insufficient light or at night, or load demand is greater than the solar cell module issued by electricity, the stored energy is released in order to meet the energy needs of the load, which is the storage of solar photovoltaic systems energy components. Currently solar photovoltaic system is commonly used lead-acid batteries, high requirements for the system, usually in deep discharge VRLA storage battery, deep discharge lead-acid batteries and other aspiration.

③ its controller lifePo4 battery charge and discharge conditions to be specified and controlled, and in accordance with the power requirement of the load control of the solar cell module and lifePo4 batteries load power output, the control unit is the core of the whole system of points. With the development of solar photovoltaic industry, more and more powerful functions of the controller with the traditional control section, inverter and monitoring system integration trends, such as AES company SPP and SMD series controller integrates these three functions.

④ inverter in the solar photovoltaic power supply system, if it contains an AC load, it is necessary to use an inverter device, DC or direct current into the battery release will produce a solar cell module is required AC load.

The basic working principle of solar photovoltaic power supply system is in the sunlight exposure, the solar cell modules produced by the control of the controller to the battery charging or direct power supply to meet the load demand in the case of the load, if the lack of sunshine or at night by battery under the control of the controller to the DC load, AC load for containing photovoltaic system, also we need to increase the inverter, portable solar power generator direct current into alternating current [1]. Application of PV systems has many forms, but the basic principles are similar. But for some other types of photovoltaic systems in the control mechanism and system components according to the actual needs of different, the following different types of photovoltaic systems will be described in detail.Save TAG: Deployment Fixed SMA Tesvolt Unlimited Volt Army Sonnen Multi-Storage Reliability Shell Manganese 200MW Ørsted Micro