Classification, composition and working principle of solar photovoltaic system

The solar photovoltaic system is mainly divided into off-grid photovoltaic power generation systems and grid-connected photovoltaic power generation systems.

1. The off-line photovoltaic power generation system is mainly composed of solar cell modules, controllers, and battery. To supply power to AC load, it is also necessary to configure AC inverters.

2, the grid-connected photovoltaic power generation system is the direct current generated by the solar component through the grid-connected inverter into the public power grid directly into the public power grid.

Working principle of solar photovoltaic system:

In the day, under illumination conditions, the solar cell module produces a certain electromotive force, through the string of the assembly The solar cell array is formed in parallel, so that the array voltage reaches the requirements of the system input voltage. The battery is charged by charging the battery by charge and discharge controller, and the electrical energy from the light energy conversion will be stored. At night, the battery pack provides an input electrical, through the action of inverter, converts DC electrical conversion to exitting flow, conveys to the power supply, and power is powered by the switching function. The discharge of the battery pack is controlled by the controller to ensure normal use of the battery. The photovoltaic power station system should also have restricted protection and lightning protection devices to protect the overload operation of the system equipment and the safe use of system equipment.

1, solar panel

Solar panel is the core in the solar photovoltaic system Some, the role of the solar panel is to convert the Pithed Roof Top Solar Mount Systems. The transition rate and service life are important factors that determine if the solar cell has the value of use.

2, the controller

The solar controller is composed of a dedicated processor CPU, an electronic component, a display, a switching power tube, and the like.

3, battery The action of the battery is to store the electric energy emitted by the solar panel when there is illumination, and release it when it is required.

4, inverter

The direct output of solar energy is generally 12VDC, 24VDC, 48VDC. In order to provide electrical energy to 220VAC, it is necessary to convert DC power emitted by solar photovoltaic systems into delivering power, so a DC-AC inverter needs to be used.