Photovoltaic power generation system is composed of the solar cell phalanx, battery, charge and discharge controller, inverter, ac power distribution cabinet, solar tracking control system and other equipment. The role of some of its equipment is:
The battery square
Whether the light (the sun or other light produced by light) cases, battery absorb light energy, appear different on both ends of the battery charge accumulation, which produce "light voltage", that is "light born v effect". In born v effect under the action of light, solar battery produces electromotive force at both ends, convert light energy into electrical energy, is energy conversion device. Solar cells are generally made from silicon, divided into monocrystalline silicon solar cells, polycrystalline silicon solar cells and amorphous silicon solar cells.
battery
Its effect is store electricity from solar cell phalanx, when light and can supply power to load at any time. The solar cell power generation for the basic requirements of batteries used are: a. low self-discharge rate; B. the service life is long; C. deep discharge ability; D. high charging efficiency; E. less maintenance or free maintenance; F. wide working temperature range; G. price is low.
The controller
Is automatically to prevent the battery overcharge and over discharge equipment. Because of the cycle of battery charge and discharge frequency and discharge depth is an important factor decided the service life of the battery, so can control battery charge or discharge to charge and discharge controller is indispensable equipment.
inverter
Is a device to convert direct current (dc) to alternating current (ac). Due to the solar battery and battery is a dc power supply,
Photovoltaic (pv) power generation 1
Photovoltaic (pv) power generation 1
And when the load is ac load, inverter is indispensable. Inverter according to the operation mode, can be divided into independent operation inverter and grid inverter. Independent operation inverter is used to run the solar cell power generation system, load power supply for independence. Grid inverter is used in the parallel operation of the solar cell power generation system. According to the output waveform, the inverter is divided into square wave inverter and sine wave inverter. Square wave inverter circuit is simple, low cost, but big harmonic component, generally used for several hundred the following system and requirements for harmonic is not high. Sine wave inverter cost is high, but can be applied to all kinds of load.