Control circuit of bidirectional inverter, bidirectional inverter and photovoltaic energy storage system

Through the coordinated control of the bidirectional flyback converter module and the power frequency full-bridge module, bidirectional energy interaction between the battery and the grid is realized, solving the problem that existing micro-inverters cannot achieve bidirectional energy interaction and improving the system's energy storage and grid interaction capabilities.

CN224481638UActive Publication Date: 2026-07-10XIAN TOPTECH TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
XIAN TOPTECH TECHNOLOGY CO LTD
Filing Date
2025-07-24
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing microinverters cannot achieve bidirectional energy interaction, which limits the application of the system in scenarios such as energy storage integration and reactive power compensation, and cannot meet the needs of new power systems for bidirectional energy interaction.

Method used

A collaborative control architecture combining a bidirectional flyback converter module and a power frequency full-bridge module is adopted, along with the main control module for intelligent switching between boost conversion, synchronous inverter and rectifier charging, to achieve bidirectional energy interaction between the battery and the power grid.

Benefits of technology

It realizes bidirectional energy interaction between the battery and the power grid, breaking through the limitation of unidirectional transmission in the traditional single-stage flyback topology, and enabling the system to have the ability to manage the charging and discharging of energy storage devices, compensate reactive power of the power grid, and respond to ancillary services.

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Abstract

The utility model discloses a control circuit of bidirectional inverter, bidirectional inverter and photovoltaic energy storage system, control circuit of bidirectional inverter includes bidirectional flyback conversion module, and bidirectional flyback conversion module includes first connecting end, second connecting end, third connecting end and fourth connecting end, and the positive pole of battery is electrically connected to first connecting end, and the negative pole of battery is electrically connected to second connecting end, and power frequency full bridge module is electrically connected bidirectional flyback conversion module, and power frequency full bridge module is used to convert power supply polarity, and input output control module includes first port, second port, third port and fourth port, and first port, second port are electrically connected power frequency full bridge module respectively, and third port and fourth port are used for electrically connected power grid, and main control module is used for controlling bidirectional flyback conversion module and carries out voltage -raising conversion, and drives power frequency full bridge module output and power grid synchronization's alternating current, and main control module controls power frequency full bridge module to carry out rectification, and adjusts bidirectional flyback conversion module and charges battery.
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