Storage battery pack online discharging system and control method

Abstract

The invention discloses a storage battery pack online discharge system and a control method. The system comprises an inverter which is used for inverting the electric energy of a storage battery packinto an alternating current and connecting the alternating current into a power grid; a discharging control switch which is used for connecting the storage battery pack into the inverter for discharging; a storage battery pack control switch which is used for controlling the storage battery pack to be powered off or on from a direct current system; and a controller which is used for controlling the working states of the inverter, the discharge control switch and the storage battery pack control switch. According to the present invention, an inverter power supply technology is applied to achieve the electric energy conversion, and the direct-current power supply energy stored in the storage battery pack is fed back to the power grid, so that the energy can be fully utilized, waste is avoided, meanwhile, heat is reduced, and it is guaranteed that the process is safe and controllable. Meanwhile, the automatic control of the capacity checking process of the storage battery pack is realizedthrough the controller. The storage battery pack online discharge system and the control method of the invention are widely applied to the technical field of power supplies.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to an online discharge system and control method for storage battery packs. Background technique [0002] Station DC power supply system is the main power supply system of secondary equipment. The DC power supply is characterized by stability and reliability; the reliability of DC power supply lies in the battery pack of the backup power supply of the DC system. In order to ensure the operation quality of the battery pack, the power maintenance unit needs to carry out a large number of maintenance work on the battery pack, including monthly voltage verification measurement, internal resistance measurement, regular equalization charging, and regular nuclear capacity discharge. The existing station DC power supply system generally adopts a double-bus DC power supply circuit, refer to image 3 , which is equipped with two chargers and two battery packs, and the two independent D...

AI Technical Summary

Problems solved by technology

Since the discharge instrument is used as a load to receive the electric energy of the battery pack, a large amount of heat will be generated during the working process of the discharge instrument, and there is a hidden danger of fire when the heat dissipation is not good; therefore, the nuclear capacity process requires maintenance personnel to operate on site, which consumes a lot of manpower and material resources

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