A multi-functional, modular integrated flexible interconnect device

By designing a multifunctional, modularly integrated flexible interconnection device, which includes an AC/DC conversion power unit, a DC fault protection unit, and an expandable power distribution interface unit, the problem of damage to the flexible interconnection device during DC side short-circuit faults is solved, improving operational reliability and flexibility, and adapting to the needs of different application scenarios.

CN224385072UActive Publication Date: 2026-06-19STATE GRID SHANGHAI ENERGY INTERCONNECTION RES INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
STATE GRID SHANGHAI ENERGY INTERCONNECTION RES INST CO LTD
Filing Date
2025-01-16
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing flexible interconnect devices are easily damaged by DC-side short-circuit faults and lack expansion capabilities on the output side.

Method used

Design a multifunctional, modularly integrated flexible interconnection device, including an AC/DC power conversion unit, a DC fault protection unit, and an expandable power distribution interface unit. The DC fault protection unit detects and blocks fault current, and the functional units are integrated into a single cabinet through modular integration.

Benefits of technology

It reduces the operational risk of flexible interconnect devices during DC-side short-circuit faults, improves the operational reliability and flexibility of the devices, adapts to the changing needs of different application scenarios, and simplifies the production, installation, and maintenance of the devices.

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Abstract

This utility model relates to a multifunctional, modularly integrated flexible interconnection device, comprising an AC / DC conversion power unit, a DC fault protection unit, and an expandable power distribution interface unit integrated within a cabinet. The AC input side of the AC / DC conversion power unit is connected to the grid-side distribution area via an isolation transformer. The DC output side of the AC / DC conversion power unit is connected to the DC input side of the DC fault protection unit. The DC output side of the DC fault protection unit is connected to the expandable power distribution interface unit via a first electrical switch for detecting and blocking DC fault current. This utility model can reduce the operational risk of the flexible interconnection device during DC-side short-circuit faults and provides expanded functionality on the output side.
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