Apparatuses of grid connecting for standalone solar power streetlight system and operating methods thereof

摘要

The present invention is to cut the discharge path of the battery to double, and selectively use the system power source to maintain the discharge depth in the process of charging with solar cells and to significantly reduce the installation cost and maintenance cost by reducing the required battery capacity The present invention relates to a system power connection system of a stand-alone solar street light and a method of operating the same. Particularly, in a stand-alone solar street light device that charges electricity generated by a solar cell to a storage battery and supplies it to a direct current load, the solar cell generates electricity. It is supplied to the battery and charged, and if the remaining capacity of the battery is lower than the dischargeable minimum voltage, the charge / discharge control unit cuts the discharge path connected to the load first, and converts the alternating current of the system power into DC by the activation control of the charge / discharge control unit. Discharge connected to a storage battery under control of a DC converter and a charge / discharge controller It is characterized by a configuration that includes a DC circuit which operates as a street light by a DC circuit which is connected to a relay section and a relay section which is switched to a supply path so as to be connected to a DC conversion section and disconnects a path secondly. There is this. The present invention having the above configuration reduces the required capacity of the storage battery, and quickly supplies the operating power of the street lamp even when the remaining capacity is insufficient, prevents overcharging by the calculation of the equation, and cuts the discharge path to double storage battery It protects against over-discharge, extending the life of battery, reducing maintenance cost and installation cost, activating the installation of solar street lights, and setting the discharge depth of battery low.