Voltage reduction device and voltage reduction control method of charger

Abstract

The invention provides a voltage reduction device and a voltage reduction control method of a charger; the voltage reduction device and the voltage reduction control method are applied to remote capacity-checking discharge of a storage battery pack; the charger is connected to a direct current bus for supplying power to a direct current load; the voltage reduction device of the charger comprises avoltage reduction module, a controllable switch set and a control module, wherein the voltage reduction module is connected between the positive output end of the charger and the positive bus of thedirect current bus in series; the controllable switch set is connected to the two ends of the voltage reduction module in parallel, and the control end of the controllable switch set is connected to the control module; the control module controls the controllable switch set to be disconnected when a discharge command is received from an upper computer, so that the voltage output by the charger tothe positive bus is pulled to be less than or equal to the first preset voltage through the voltage reduction module; and the control module is used for controlling the controllable switch set to be closed when a discharge ending command is received from the upper computer so as to bypass the voltage reduction module.

Description

technical field [0001] Embodiments of the present invention relate to the fields of electric power and communication, and more specifically, relate to a voltage reducing device for a charger and a voltage reducing control method for a charger. Background technique [0002] According to the provisions of "GB / T 19826 General Technical Conditions and Safety Requirements for DC Power Supply Equipment in Electric Power Engineering" and "DL / T724-2000 Technical Regulations for Operation and Maintenance of Battery DC Power Supply Devices for Power Systems", valve-regulated batteries must be checked within a certain period. Discharge, the current technical conditions, completely rely on manual to the site to use the resistive dummy load to discharge the nuclear capacity. Switch the connecting switch from the open state to the closed state, connect the second group of backup battery bus to the first DC bus of the first group of batteries, and play the role of backup power supply, and ...

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention aims at the problem that the above-mentioned charger that cannot be written into can not realize the remote control of the output voltage, so that the remote control of the online storage battery core capacity discharge cannot be implemented safely, and provides a charger step-down device and a charger step-down Control Method

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