Bidirectional energy flow type photovoltaic energy storage system

By designing a bidirectional energy flow photovoltaic energy storage system, the combination of multiple modules is used to realize the bidirectional energy flow between the photovoltaic module, the energy storage module and the power grid, solving the problem of unidirectional energy flow in the existing system and improving energy utilization efficiency and flexibility.

CN222691430UActive Publication Date: 2025-03-28苏州腾圣技术有限公司
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Patent Information

Application Number
CN202421403526.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-19
Publication Date
2025-03-28
Estimated Expiration
2034-06-19

AI Technical Summary

Technical Problem

The existing micro balcony photovoltaic energy storage system can only realize unidirectional energy flow, flowing from the DC bus side to the grid side, but not from the grid side to the DC bus side.

Method used

A two-way energy flow photovoltaic energy storage system is designed, including a photovoltaic module, a first filter module, a first bidirectional energy conversion module, an energy storage module and a second bidirectional energy conversion module. Through the combination of these modules, the power generated by the photovoltaic module can flow to the energy storage module and the power grid, the power grid can flow to the energy storage module, and the power stored by the energy storage module can flow to the power grid.

Benefits of technology

The two-way energy flow between the photovoltaic energy storage system and the power grid is realized, the problem of unidirectional energy flow is solved, and the energy utilization efficiency and flexibility of the system are improved.

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Abstract

The embodiment of the utility model discloses a bidirectional energy flow type photovoltaic energy storage system. The bidirectional energy flow type photovoltaic energy storage system comprises a photovoltaic module, a first filtering module, a first bidirectional energy conversion module, an energy storage module and a second bidirectional energy conversion module, the photovoltaic module, the first filtering module, the first bidirectional energy conversion module and the second bidirectional energy conversion module are all connected with the direct current bus, the second bidirectional energy conversion module is connected with a power grid, and the first bidirectional energy conversion module is connected with the energy storage module; the first filtering module is used for filtering electric energy flowing into the direct-current bus, the first bidirectional energy conversion module is used for performing electric energy conversion on electric energy input by the direct-current bus or electric energy output by the energy storage module, and the second bidirectional energy conversion module is used for performing electric energy conversion on electric energy input by a power grid or electric energy output by the direct-current bus. According to the scheme, bidirectional energy flow between the bidirectional energy flow type photovoltaic energy storage system and the power grid is realized.
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