Changhui Lighting: How to use solar street lights according to local conditions

As a green energy source without any pollution, solar cells are very suitable for use in road lighting, especially in areas without power supply or where it is difficult to lay power lines. One of the main reasons that currently plague the development of solar street lights in cities is the wrong positioning, blindly using them in the main roads of urban roads, roads in the city center or commercial centers, large transportation hubs and other locations, the result is that despite efforts, Since the electric energy provided by solar cells can not meet the illumination requirements of expressways, trunk roads and Yingbin roads, the application of solar cells in road lighting is currently mainly street lamps and garden lamps. The solar photovoltaic power and mains complementary lighting method is a good way to solve the problems existing in the application of ordinary solar photovoltaic lighting systems in urban areas with mains electricity, especially if solar street lights are to be installed on urban roads where lighting cables have been laid before, Not at all. Don't double the capacity of batteries and solar cells for the uncommon few consecutive rainy conditions every year, it's a waste most of the time of the year. In this case, it is only necessary to consider the electric energy demand in the time period of the longest sunshine time in a year and the shortest lighting time at night, and other energy can be supplemented by the mains. In this way, the efficiency of the solar cell can be maximized, the capacity of the battery can be minimized, the system cost can be minimized, and the system reliability of the solar street light can be maximized. Therefore, if solar street lights are to be installed on roads where lighting cables have already been laid in the city, the complementary lighting method of solar photovoltaic power and mains electricity is a good way to adapt to local conditions. At the same time, in accordance with the requirements of Article 6.1.2 of the 'Urban Road Lighting Design Standards' CJJ45-2006, which was implemented on July 1, 2010, the solar street light project must be powered by dual power sources in important squares in the city. The complementary lighting of photovoltaic power and mains can not be said to be a bad method. In cities, the cost of dual-circuit power supply is quite high in some places. The complementary lighting of solar photovoltaic power and mains will greatly reduce the cost of dual-circuit power supply for street lamps.