Bidirectional DCDC converter and optical storage system

Abstract

The invention provides a bidirectional DCDC converter and an optical storage system. When a low-voltage input/output interface is connected with energy storage equipment, the energy storage equipment can obtain high voltage from a high-voltage input/output interface through a second switching tube and a second capacitor or obtain lower high voltage from a lower high-voltage input/output interface through a third switching tube and a third capacitor, then, the energy storage equipment is charged after the voltage is reduced through a first switching tube, a first capacitor and a first inductor, at the moment, the system can enable the energy storage equipment to obtain electric energy through the lower high-voltage input/output interface with lower voltage reduction to achieve charging and reduce loss of the electric energy in the charging process. Similarly, the energy storage equipment can discharge through a high-voltage input/output interface with higher boosting to reduce loss of the electric energy in the discharging process. In addition, compared with traditional two sets of charging and discharging DCDC converters, the bidirectional DCDC converter has the advantages that the circuit cost is low, and high utilization rate of the electric energy of an overall distributed power supply system can be achieved.

Description

technical field [0001] The invention relates to the technical field of electric energy conversion, in particular to a bidirectional DC-DC converter and an optical storage system. Background technique [0002] The current situation of multiple new energy grid-connected power generation has brought a certain burden to the stability of the large power grid. In order to reduce the proportion of new energy grid-connected and increase its self-generation and self-use rate, the power supply system in the prior art mostly uses energy storage equipment and A distributed power supply system that combines a variety of new energy grid-connected power generation, because the energy storage equipment needs to be replaced manually, its configuration voltage is low, generally 48V, so its charging and discharging requires a DCDC converter with a high boost ratio. [0003] The two sets of charge-discharge DCDC converters or bidirectional DCDC converters traditionally used can make the energy ...

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Problems solved by technology

[0002] The current situation of multiple new energy grid-connected power generation has brought a certain burden to the stability of the large power grid. In order to reduce the proportion of new energy grid-connected and increase its self-generation and self-use rate, the power supply system in the prior art mostly uses energy storage equipment and A distributed power supply system that combines a variety of new energy grid-connected power generation, because the energy storage equipment needs to be replaced manually, and its configuration voltage is low, generally 48V, so its charging and discharging requires a D

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