The large-scale integration of distributed power sources, the diversification of electricity loads, and the increasing proportion of DC loads have greatly impacted the structure and operation of traditional distribution networks. Utilizing fully controllable power electronic devices for flexible interconnection in distribution networks can enhance system controllability, reliability, and security. It also promotes the integration of distributed power sources and meets the demand for high-quality power supply, making it an important means of evolving towards future smart distribution grids. Our flexible interconnection device offers the following features:

1. Based on inverter matrix technology, it enables flexible interconnection between AC and DC ports at different voltage levels. It comes with energy storage charge/discharge and photovoltaic MPPT control, supporting direct integration of energy storage and photovoltaic systems. It is the highest-integrated AC/DC hybrid interconnection device in China.
2. The AC-side port supports power quality control, improving the power quality on the output side of the transformer and reducing losses.
3. Modular design of the inverter allows for the removal of damaged modules without affecting the normal operation of other modules. It supports redundancy, thereby enhancing equipment reliability.
4. Combination of distributed and centralized control, with self-organizing high-speed fiber optic communication for carrier-grade synchronous control. The inverter modules are plug-and-play, supporting series and parallel connection of power modules to adapt to different voltage and power levels. Simultaneously, it enables interconnection between AC and DC ports at different voltage levels, enhancing equipment flexibility.
5. It adopts the I-type three-level topology, achieving miniaturization and high efficiency compared to the two-level topology under the same power rating. This reduces harmonic injection into the power grid from the device.

With these characteristics, our flexible interconnection device enables the transformation of distribution networks, improving controllability, reliability, and safety. It facilitates the integration of distributed power sources, meeting the demand for high-quality power supply and playing a crucial role in the evolution towards future smart distribution grids.