Novel tapped resonant push-pull photovoltaic energy storage inverter topological structure

By using a tapless resonant push-pull photovoltaic energy storage inverter topology and interleaved control technology, the problems of control complexity and low efficiency of traditional energy storage inverters are solved, achieving high-efficiency energy conversion and extended battery life, making it suitable for residential, commercial facilities and industrial energy storage systems.

CN122092422APending Publication Date: 2026-05-26AVO NEW ENERGY TECHNOLOGY (SHANGHAI) CO LTD
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Patent Information

Application Number
CN202610428674.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-02
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing single-phase and three-phase energy storage inverters suffer from problems such as complex control, high cost, low efficiency, large power loss, overload, and high-frequency ripple, making it difficult to meet the requirements of high-efficiency energy conversion.

Method used

It adopts a tapless resonant push-pull photovoltaic energy storage inverter topology, combined with dual transformer interleaved control technology and three-level inverter circuit design, including photovoltaic boost MPPT circuit, DC-AC bidirectional inverter circuit and battery-side DC-DC tapless resonant push-pull bidirectional isolated charging circuit. Through interleaved control and zero current shutdown function, the battery charging and discharging process is optimized, reducing high-frequency ripple and electromagnetic interference.

Benefits of technology

It improves the overall efficiency and stability of photovoltaic energy storage systems, reduces system complexity and cost, extends battery life, complies with international electromagnetic compatibility standards, and adapts to the needs of energy storage systems of different scales.

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Abstract

The invention discloses a novel tapped resonant push-pull photovoltaic energy storage inverter topological structure, and relates to the technical field of energy storage system topological control, in particular to the novel tapped resonant push-pull photovoltaic energy storage inverter topological structure. The system comprises a photovoltaic boost MPPT circuit, a DC-AC bidirectional inverter circuit, and a battery side DC-DC tapped resonance push-pull bidirectional isolation charging circuit. The photovoltaic boost MPPT circuit is used for increasing the DC voltage of a photovoltaic cell panel and performing maximum power point tracking control. The DC-AC bidirectional inverter circuit performs bidirectional conversion from direct current to alternating current through three paths of independent T-type three-level circuits, each path is independently controlled, and current low harmonic waves are output; the battery side DC-DC tapped resonance push-pull bidirectional isolation charging circuit comprises a tapped transformer and a push-pull circuit. Through the innovative tapped resonant push-pull circuit, the double-transformer interleaving control technology and the three-level inverter circuit design, efficient power conversion, optimized battery charging and discharging management and reduced high-frequency ripple and electromagnetic interference are realized, so that the overall efficiency, stability and reliability of the photovoltaic energy storage system are improved.
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