Photovoltaic power generation system is composed of the solar cell phalanx, battery, charge and discharge control, inverter, ac distribution cabinets, sun Shadowed control system equipment. The role of some of its equipment is: battery phalanx in light ( Whether the sun is still the
photovoltaic power generation system by the solar cell array, battery pack, charge and discharge controller, inverter, ac distribution cabinets, such as solar tracking control system equipment. It is the function of some of the equipment: battery array under the condition of light ( Either the sun or other light source of illumination) Absorb light energy, battery, the accumulation of different charge on both ends of the battery, this kind of situation will happen. Light voltage; , this is. Photovoltaic effect; 。 Under the action of the photovoltaic effect, produces electromotive force on both ends of the solar cell, convert light energy into electrical energy, is an energy conversion device. Solar cells are typically made from silicon, divided into monocrystalline silicon solar cells, polycrystalline silicon solar cells and amorphous silicon solar cells. Battery its function is to store the solar cell array of the luminous power, and can supply power to load at any time. The basic requirement of the solar cell power generation are: a. Low self-discharge rate; b。 The service life is long; c。 Strong deep discharge capacity; d。 High charging efficiency; e . Little or no protection; f。 Wide working temperature range. At a low price. Operator that is a kind of can automatically prevent the battery overcharge and over discharge device. Due to 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 a battery charging or discharging charge and discharge controller is an essential device. Inverter which is a device that converts direct current into alternating current (ac). Due to the solar battery and battery is a DC power supply, when the load is ac load, inverter is indispensable. According to the operation mode, the inverter 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 can be divided into square wave inverter and sine wave inverter. Square wave inverter circuit is simple, the cost is low, but big harmonic component. It is often used to power up to hundreds of watts and the lower harmonic components of the system. Sine wave inverter cost is high, but can be applied to all kinds of load.