Views: 0 Author: Site Editor Publish Time: 2024-11-10 Origin: Site
Photovoltaic (PV) power generation is a technology that directly converts light energy into electrical energy using the photovoltaic effect at the semiconductor interface. It primarily consists of three main components: solar panels (modules), controllers, and inverters, with the major parts composed of electronic components.
Principle: When sunlight shines on semiconductor materials (e.g., silicon), the photon's energy is transferred to the electrons within the semiconductor, causing them to transition into free electrons and generate an electric current. Solar cells are connected in series, encapsulated for protection, and combined to form large solar modules. These, paired with power controllers and other components, constitute a photovoltaic power generation system.
Distributed photovoltaic power generation refers to photovoltaic systems built near the user’s site, characterized by self-consumption of generated power on the user side, with excess electricity fed into the grid and balance adjustments managed within the distribution system.
Detailed Features:
System Composition: A distributed PV system mainly includes PV modules, array mounting brackets, DC combiner boxes, DC distribution cabinets, grid-tied inverters, AC distribution cabinets, and related monitoring and protection devices.
Characteristics:
Smaller Power Output: Typically, the output of distributed PV systems ranges from a few kilowatts to several megawatts. Compared to large-scale centralized PV power plants, distributed PV systems are better suited for decentralized energy demands.
On-Site Consumption: Electricity generated by distributed PV systems is primarily consumed on-site, reducing energy losses during transmission and improving energy efficiency.
Flexible Construction: The installation location and scale can be adjusted according to different application scenarios and user needs. These systems can be installed on rooftops, building facades, or carports, effectively utilizing idle spaces without occupying large land areas.
Low Voltage Access: Typically connected to the grid at voltage levels of 35 kV or below, the connection process is simpler and has minimal impact on the grid, while easing power supply pressure in localized areas.
Application Scenarios:
Urban Buildings: Distributed PV systems can be installed on the rooftops of commercial buildings, industrial factories, and residential houses in cities, partially or fully meeting their electricity needs and reducing energy costs.
Rural Areas: They can serve as an essential supplement to rural energy supply, providing electricity for residential use, small-scale industries, and agricultural irrigation, promoting rural economic development.
Remote Areas and Islands: In regions where traditional power grids struggle to meet electricity demands, distributed PV systems offer reliable electricity for local residents and infrastructure, improving living and production conditions.
