Bidirectional electric energy metering device for DAB converter

Abstract

The invention discloses a bidirectional electric energy metering device for a DAB converter. The bidirectional electric energy metering device comprises a voltage acquisition module, a current acquisition module, a signal conditioning module, an isolation module, a bidirectional electric energy metering chip, a microprocessor, a storage module, a key module, a communication module, a power supply module and a display module. The voltage sampling module and the current sampling module acquire voltage and current signals of the primary side and the secondary side of a DAB converter and transmit the signals to the bidirectional electric energy metering chip through the signal conditioning module and the isolation module for metering analysis. Data transmission is performed through the communication module, so that remote query is facilitated. According to the invention, the voltage, current, power and electric energy of the primary side and the secondary side of the DAB converter can be monitored in real time; and the measured data can be analyzed, so that the operation state and the conversion efficiency of the DAB converter can be obtained.

Description

technical field [0001] The invention belongs to the technical field of electric power measurement, and in particular relates to a bidirectional electric energy metering device for a DAB converter. Background technique [0002] In recent years, power electronics technology has played a huge role in energy saving and emission reduction. Important applications such as new energy grid connection, electric vehicles, aviation power systems, and ship power systems have brought new challenges to the energy recovery and utilization of power electronic converters. Therefore, the corresponding converter is required to have the characteristics of bidirectional flow of power. At present, bidirectional DC / DC converters are widely used in occasions requiring bidirectional flow of energy. The circuit usually adopts a dual active bridge (Dual Active Bridge, DAB) topology. The DAB converter can realize the zero-voltage switching technology of the switching tube, and it has the advantages of...

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Problems solved by technology

[0004] Aiming at the inability of the traditional AC power metering device in the prior art to meet the requirements of the DAB converter for bidirectional metering and the inability to monitor the conversion efficiency of the DAB converter under different operating conditions, the present invention provides a bidirectional power meter for the DAB converter. Metering device, the purpose is to solve the power metering of DAB converter for power output and feedback in different scenarios

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