Battery in the application of PV systems

Battery in the application of PV systems




China's vast territory, population, unevenly distributed, the East Missy sparse, due to geographical environment and the economy is relatively backward and other factors, the relative lack of power in some areas, the state electricity grid can not be covered by an inability to concentrate power, or power quality and instability, to the local economic development, improving people's lives caused by some obstacle. Especially in China, North, Northwest, etc. problem is especially highlighted the urgent need for a stable and reliable for use when the power system. Is now a separate power supply systems are commonly used generator sets, solar energy systems, wind power systems, scenery complementary system.

Generating units, in order to promote an energy as a power source for internal combustion engine, internal combustion engines driving generators, generators do magnetic field lines cutting transport \ movement to generate electricity. The primary energy resources are getting scarcer and prices higher and higher, and the serious impact on the natural environment.

Solar energy systems, wind power systems, scenery complementary system to the natural world with the endless inexhaustible solar energy, wind power as an energy source, by means of some equipment can be used for installation into electrical energy, this energy of natural, environmental protection, fully embody the energy-saving, environmental protection, love the concept of the earth. And such power can continue to supply the capacity of storage devices needed to provide protection, the key equipment used in nickel-cadmium storage batteries, battery. However, as the cost of raw materials, the lack of other reasons, Nickel-cadmium batteries gradually been replaced by battery. Photovoltaic systems as an example below to tell us about the battery in the application of PV systems.

Solar System Introduction

1. PV system works:

In the light conditions are good cases, the solar cell components produce a certain electromotive force, through the formation of components of the series-parallel solar cell matrix, making square voltage system input voltage demands. Part of the supply of electric power systems use, in part through the charge and discharge controller to charge batteries, solar energy conversion to electrical energy from storage. Who fail in the light conditions, the battery and through the power inverter to provide the electricity needed to power system.

2. PV system components:

PV system is composed of solar cells square, battery, charge and discharge controller, inverter and other equipment composition. The role of the various pieces of equipment are:

(1) solar cell matrix: in a light case, the battery to absorb light energy, the battery charge at both ends of the accumulation of opposite sign appears, that is produced \ "photo-voltage \", that is, \ "photovoltaic effect \." In the photovoltaic effect under the influence of electromotive force generated at both ends of the solar cell will convert solar energy into electrical energy, is energy conversion device. Silicon solar cells are generally divided into monocrystalline silicon solar cells, polycrystalline silicon solar cells and amorphous silicon solar cells Triple kinds.

(2) Battery group: its role is to store solar cell matrix issued by the illumination energy and ready for power to the load.

(3) Controller: automatic control of power options in the city, electricity, solar power, battery power to choose between, for battery charging.

(4) Inverter: DC is converted into alternating current equipment.



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