Active power grid feedback type battery discharging apparatus

Abstract

The invention relates to an active power grid feedback type battery discharging apparatus comprising a low-pass filtering channel formed by a control circuit, an inductor and a capacitor. An IGBT module forms an H bridge inversion device. An inductor and a transformer form an isolated output device. The low-pass filtering channel is connected with the H bridge inversion device that is connected with the isolated output device. A storage battery carries out filtering by the low-pass filtering channel; the H bridge inversion device is controlled by the control circuit, so that the storage battery current after filtering becomes a sinusoidal wave; and then the current is filtered by the inductor and the transformer and are outputted in an isolated mode; and the current is fed back to the power grid. The apparatus has the following advantages: the high-frequency PWM rectification technology is used and the battery energy is fed back to the power grid; no heat is caused; and security and reliability are high. The discharging process is controlled automatically and the unattended operation is realized. The current injected into the power grid is a sinusoidal wave and the no harmonic pollution on the power grid is caused by the apparatus.

Description

technical field [0001] The invention belongs to the technical field of DC power supply systems, and in particular relates to an active grid feedback type battery discharge device. Background technique [0002] Under the background of the country's promotion of energy conservation and emission reduction and green manufacturing, energy conservation and emission reduction has become the most frequently mentioned vocabulary in all walks of life. As a key area of ​​energy consumption and pollution discharge, the electric power industry is facing huge environmental protection pressure. The level of its conversion efficiency and pollution control have an important impact on resources and the environment. Active inverter converts DC power into AC power and feeds it back to the grid, which can realize energy recovery and reuse, and has been widely used in the context of building a conservation-minded society. [0003] The battery is an important part of the DC power system. As a DC...

AI Technical Summary

Problems solved by technology

[0005] The device using resistance discharge is low in cost and simple in structure, but it is bulky, red and hot, and the temperature rises, causing fire hazards. Technically, it cannot meet the needs of constant current discharge of batteries to measure capacity.

Using PTC thermistors instead of resistors wastes energy and does not meet the requirements of green environmental protection

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