City illumination and emergency system adopting solar photovoltaic system as power supply

Abstract

The invention discloses a city illumination and emergency system adopting a solar photovoltaic system as a power supply, which consists of a solar photovoltaic battery array (1), a city illumination system (3), a control dispatching center (6), a storage battery (2), an emergency load (4) and a back-up power supply (5), wherein the control dispatching center has the functions of photovoltaic generating system distribution management, alternating and direct current control, grid-connected control, storage battery management, illumination control, emergency system control, measurement and the like. In the city illumination system in which a photovoltaic power supply system and a large power grid are complementary, a photovoltaic generating system can supplies power independently for the city illumination system and can realize grid-connected output so that the utilization ratio of the photovoltaic generating system is improved; the city illumination system can take power from the photovoltaic generating system and the large power grid; and the service life of the storage battery can be prolonged through concentrated charging and discharging management. Simultaneously, the solar photovoltaic system, the storage battery and the back-up power supply can serve as an emergency power supply system of city important loads in an emergency.

Description

technical field [0001] The invention relates to a lighting and emergency system powered by solar photovoltaics. Background technique [0002] The energy system dominated by fossil energy is unsustainable. Fossil energy resources have begun to be exhausted, and large-scale utilization has caused serious environmental problems. With the acceleration of urbanization and industrialization in my country, electricity consumption and demand will also increase rapidly. It is necessary to accelerate the large-scale development and local consumption of renewable energy in cities. [0003] Solar photovoltaic street lights have been applied in the lighting systems of many cities. However, the currently used solar street lamps are all independent power supply systems, that is, each street lamp is equipped with solar photovoltaic cell components and batteries for energy storage. In order to ensure that photovoltaic street lights can also provide lighting in continuous rainy days, solar ...

AI Technical Summary

Problems solved by technology

In order to ensure that photovoltaic street lights can also provide lighting in continuous rainy days, solar photovoltaic cell components and batteries are designed with a redundancy of 2-3 times, which increases the cost; and, when the battery is fully charged, the power generated by the photovoltaic modules is No more charging, resulting in low utilization of equipment and waste of renewable energy power; in addition, the excess power stored in the battery has no other use, only used to improve night lighting

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