An intelligent power supply system for auxiliary power supply of grid-connected equipment

Abstract

The invention provides an intelligent power supply system for auxiliary power source of power grid-connection equipment, comprising: power grid-connection equipment and a power supply choosing circuit. The power supply choosing circuit is arranged between the power grid-connection equipment and the power grid. The power grid-connection equipment comprises the auxiliary power source which provides power to the blower fan inside the power grid-connection equipment. A breaker is arranged between the power grid-connection equipment and the power grid. When the breaker is off, the power grid-connection equipment is cut off from the power grid. When the breaker is closed, the power grid-connection equipment is incorporated into the power grid. According to the invention, the power supply choosing circuit is used to make the auxiliary power supply provide power from the grid output or from the prior inverted output and enables the power supply part to be connected with the output power supply point after the turn-off the circuit. The inverted output or the post-grid-output both undergo an isolation transformer and a rectification bridge. Through the use of the isolation transformer, the voltage is adjusted for various voltage values for use by large power components like blower fan through the rectification bridge. As the load capacity of the isolation transformer is stronger than that of a flyback power board, the defects in reliability of an existing flyback power board to the power supply to large power components can be overcome.

Description

technical field [0001] The invention belongs to a power supply system, in particular to an intelligent power supply system for an auxiliary power supply of grid-connected equipment. Background technique [0002] The load of the power grid is very unbalanced at different times of the day. 6-9 o'clock in the evening is the peak time of power consumption. In order to meet the power supply during the peak time of power consumption, it is necessary to call the backup energy storage power station and energy storage system to supply power to the power grid. . This process requires the use of grid-connected devices. As a power system, grid-connected devices are also widely used in various occasions such as photovoltaic grid-connected power generation systems, energy storage power stations, and energy storage cabinets. The main function of the grid-connected device is to invert the direct current generated by wind energy, solar energy and batteries into alternating current and feed...

AI Technical Summary

Problems solved by technology

These two power supply methods are limited by the voltage provided by the battery unit and the load capacity of the flyback power board, and cannot provide high power output.

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