Photovoltaic systems typically consist of photovoltaic arrays, battery packs (optional) , battery controllers (optional) , inverters, AC distribution cabinets, and Sun tracking control systems. high-power concentrating photovoltaic (HCPV) systems also include photovoltaics (usually focusing lenses or mirrors) .
The functions of the photovoltaics system are as follows:
1. PV Array, a direct current (DC) power generating unit consisting of a number of photovoltaic modules or panels assembled in a certain manner and having the same supporting structure, the battery absorbs the light energy, the battery two ends appear the different sign charge accumulation, namely produces“The photogeneration voltage”. This is photovoltaic effect. Under the action of the photovoltaic effect, the two ends of the solar cell generate an electromotive force, which converts light energy into electricity, completing the energy conversion
2. Accumulator (optional) the function of accumulator is to store the electric energy of solar cell array and supply it to load at any time 2 long life, 3 strong deep discharge ability, 4 high charging efficiency, 5 little maintenance or no maintenance, 6 working temperature range of the same width, 7 low price.
3.Battery controller (optional) Battery Controller is a device that can automatically prevent battery from overcharging and overdischarging. Because the cycle charge and discharge times and discharge depth are important factors to determine the service life of the battery, the battery controller which can control the overcharge or overdischarge of the battery is necessary
4.A solar inverter is a device that converts direct current into alternating current. When solar cells and batteries are DC power supply, and the load is AC load, the inverter is essential J inverter by way of operation, can be divided into off-grid inverter and solar inverter. Off-grid inverters are used in independent solar cell power generation systems to supply power to loads. A solar inverter solar-cell power system used in grid-connected operations. The inverter can be divided into square-wave inverter and sine-wave inverter according to output waveform. The circuit of square-wave inverter is simple and low cost, but the harmonic component is large. The sine wave inverter has high cost, but it can be applied to all kinds of loads.
5.Tracking system because the sun rises and sets every day throughout the year, relative to a photovoltaics system in a given location, the The Hours of the Sun's light varies, only when the solar panels are always facing the sun can the efficiency of electricity generation be at its best. The universal sun-tracking control system in the world needs to calculate the angle of the Sun at different times of each day of the year, based on information such as the latitude and longitude of the placement point, the position of the Sun at every moment of the year will be stored in PLC, microcontroller or computer software, that is, by calculating the position of the Sun to achieve tracking is the use of computer data theory. Need the earth longitude and latitude region data and settings, once installed, it is not convenient to move or disassemble, every move must be re-set data and adjust the parameters.