2 Building photovoltaic power generation system
1 Overview
The building photovoltaic power generation system is a new type of integrated power generation and energy utilization mode that combines building and photovoltaic power generation and has broad development prospects. It is a new concept of applying solar power generation. Simply put, the solar photovoltaic power generation array is installed on the exterior of the building envelope to provide electricity. Sunlight produces a photovoltaic effect on the solar cell, generating direct current. The solar cells are connected and encapsulated on different materials to form components. The components are connected in series and in parallel by electrical photovoltaic arrays. The DC output from the photovoltaic array is converted into AC power through the inverter and integrated into the power grid, implementing “self-use and self- The operation mode of “electrical access, near consumption, and power grid adjustment†can effectively solve the problem of power loss during boosting and long-distance transportation.
2) System Solution
2.1) Single-phase grid-connected power generation system
2.1.1) Application
Suitable for small building photovoltaic systems, installed capacity is generally less than 10kW, can also be used in conjunction with power inverters, and grid voltage is 220V.
2.1.2) System Structure
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2.1.3) A scheme diagram
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2.2) Three-phase string and grid-connected power generation system
2.2.1) Application
In the three-phase series grid-connected power generation system, the power generation is generally in the range of 10 to 200 KW. It is applicable to medium-sized building photovoltaic systems, and each photovoltaic string allows different installation directions and different specifications.
2.2.2) System Structure
Single string inverter system structure diagram
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Multiple string inverter system structure diagram
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2.2.3) A scheme diagram
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2.3) Three-phase centralized grid-connected power generation system
2.3.1) Application
The three-phase centralized grid-connected power generation system generally has a power generation capacity of 200 to 1000 KW, an applicable voltage of 380 V or a boost of 10 KV or more, and the power generation system is suitable for a roof-type power generation project of a large-scale factory building, and the shape of the roof of a building is required to be free from obstructions.
2.3.2) System Structure
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2.3.3) A scheme diagram
Ankerui Zhou Jie
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