DC/DC (direct-current/direct-current) conversion and control system based on proton exchange membrane fuel cell

Abstract

The invention discloses a DC / DC (direct-current / direct-current) conversion and control system based on a proton exchange membrane fuel cell. The DC / DC conversion and control system comprises a main circuit module and a control circuit module, wherein the main circuit module comprises a dual-stage parallel BUCK converter, and the input end of the dual-stage parallel BUCK converter is connected with a power output end of the proton exchange membrane fuel cell, and the output end of the dual-stage parallel BUCK converter is connected with a communication load for supplying power directly; and the control circuit module comprises a DSP (digital signal processor) control chip, an IGBT (insulated gate bipolar transistor) gate pole driving circuit unit, a hall detecting circuit unit and an input simulation signal regulating circuit unit and the like, wherein the related control algorithms are realized through DSP digital control. The system provided by the invention is suitable for the power conversion of high-current output power equipment of the proton exchange membrane fuel cell, can lower the cost and increase the system reliability, achieves voltage real-time matching and regulating control of the proton exchange membrane fuel cell as a communication spared power supply, adopts a full-digital control mode, and has the advantages of high accuracy, rapidness in reaction, low energy consumption and the like.

Description

technical field [0001] The invention belongs to the technical field of communication backup power supply, in particular to a DC / DC conversion and control system of communication backup power supply based on proton exchange membrane fuel cell. Background technique [0002] A proton exchange membrane fuel cell is a device that converts the chemical energy of hydrogen and oxygen directly into electrical energy. When a steady stream of hydrogen and oxygen (or air) is supplied to the PEM fuel cell from the outside, it can generate electricity continuously. Fuel cells are known as the fourth-generation power generation device after water power, fire power, and nuclear energy and a power device that replaces internal combustion engines. In recent years, the use of fuel cells as communication backup power has gradually started to be deployed around the world, and thousands of sets are currently in operation on the network. Traditional backup power supply solutions, such as diesel ...

AI Technical Summary

Problems solved by technology

Among these commonly used DCDC converters, few are suitable for large current input. Generally, only the full-bridge type is used more, but because the full-bridge type uses a large number of power switch tubes, and the circuit contains high-frequency transformers, This makes the cost of the converter greatly increased, and increases the complexity of the control. In addition, the use of high-frequency transformers affects the compact structure of the converter.

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