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Advantages of the setup of solar street lights and grid electricity complementary system

Category: Industry News

Jan 04,2022

Design of Solar Photovoltaic Street Light and Grid Power Complementary Lighting System The technical key in the design of solar photovoltaic power and grid power complementary lighting systems is no longer about solar cells and batteries, but rather under what conditions and at what locations the grid power is integrated; the impact of the grid power integration process on different types of light sources; the characteristics of automatic light switching in the solar photovoltaic power and grid power complementary lighting system, as well as daily management issues of the system.

The design of the solar photovoltaic street light and the complementary lighting system with municipal electricity focuses on technical keys such as the conditions and locations for municipal electricity to cut in, the impact of the cut-in process on different types of light sources, the characteristics of automatic light switching in the complementary lighting system, and daily management issues.

 

The basis for municipal electricity cut-in in the solar photovoltaic power and municipal electricity complementary lighting system is that municipal electricity can only fully cut in when the energy supplied by the solar cells is insufficient to drive the light source. How to determine that the energy supplied by the solar cells is insufficient to drive the light source is key to this issue.

Testing the terminal voltage of the battery should be the simplest and most effective method. Since the power of the light source is constant, the discharge current of the battery is fundamentally stable, and the situation of the solar photovoltaic system, especially its stored energy size, can be reflected in the terminal voltage of the battery. Therefore, municipal electricity cut-in can be controlled by testing the terminal voltage of the battery. For lead-acid batteries, in a 12V system, it is generally chosen that when the battery voltage drops to 11V, at dawn, the street light switches from solar photovoltaic power to municipal electricity; if it is a 24V system, it switches to municipal electricity when the battery voltage drops to 22V.

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