China Solar Energy System Suppliers
Photovoltaic power generation system is the use of photovoltaic effect to convert solar energy into electricity system, its categories can be divided according to different classification standards. The following is an introduction to the main categories of photovoltaic power generation systems:
First, according to the access to the power grid classification
Grid-connected photovoltaic power generation system
Definition: Connected to the public grid, the generated electrical energy is input to the grid.
Composition: mainly includes photovoltaic array, grid-connected inverter, load and power grid. Grid-connected photovoltaic power generation systems usually do not need to configure batteries, relying on the grid for energy storage regulation.
Application scenario: Suitable for photovoltaic power generation projects of various scales, including large ground power stations, medium-sized industrial and commercial power stations and small household power stations.
Advantages: It can make full use of the power of photovoltaic array, reduce energy loss and reduce system cost. At the same time, the excess energy can be sold to the power company at a profit.
Off-grid photovoltaic power generation system
Definition: photovoltaic power generation system that is not connected to the public grid and operates independently.
Composition: Mainly includes solar modules, controllers, batteries and inverters (if AC is required).
Application scenario: It is usually built in remote areas far from the power grid or used as a mobile portable power supply in the field, such as remote mountains, no power areas, islands, communication base stations and street lights.
Advantages: not subject to regional restrictions, not dependent on the power grid, wide range of use. It can be installed and used wherever there is sunlight.
Second, classified by energy storage device
Photovoltaic power generation system with energy storage device
Features: The system contains energy storage devices such as batteries, which are used to store excess electric energy to ensure that it can still supply power when there is no light or power grid outage.
Application scenario: Applicable to situations where continuous power supply is required, such as communication base stations, hospitals, and data centers.
Photovoltaic power generation system without energy storage device
Features: The system does not contain storage devices such as batteries, and all the generated electricity is directly input into the grid or supplied to the load.
Application scenario: Applicable to areas where the power grid is stable and the light is sufficient, and where users do not have high requirements on the continuity of power supply.
3. Classification by system structure
Centralized grid-connected photovoltaic power generation system
Features: Mainly use desert and other concentrated areas to build large-scale photovoltaic power stations, power generation directly into the public grid, access to high-voltage transmission system.
Application scenario: Suitable for large-scale photovoltaic power generation projects, such as national power stations.
Distributed grid-connected photovoltaic power generation system
Features: Generally built in the vicinity of users, such as industrial plants, public buildings, residential roofs and so on. The electricity produced is mainly for the user's own use.
Application scenario: Suitable for distributed photovoltaic power generation projects of various scales, with the characteristics of small capacity and low voltage level.
