1st H2: Challenges of New Distribution System Construction


Under the backdrop of the "Dual Carbon" strategy, the construction of new power systems is accelerating. The high penetration of renewable energy sources, leading to voltage fluctuations and frequency instability, is becoming increasingly prominent. Traditional distribution network architectures struggle to meet the demands of "source, grid, load, and storage" synergy. Improving the grid's absorption capacity and optimizing energy efficiency are pressing challenges for the industry. DC distribution technology, with its low losses, high efficiency, and flexibility, is becoming a key tool for supporting the high penetration of renewable energy and building a low-carbon, flexible grid.

2nd H2: Schneider Electric's DC SeT Medium-Voltage DC Technology

At the 7th Switchgear Professional Technical Exchange Conference in 2025, Schneider Electric showcased its DC SeT medium-voltage DC metal-enclosed switchgear, showcasing its innovative capabilities in flexible DC distribution. This device utilizes reliable mechanical switches and mature vacuum arc extinguishing technology at its core, supplemented by a small number of power electronic components. It achieves high reliability, comprehensive safety, intelligent operation and maintenance, economic adaptability, and flexible response, providing solid technical support for the upgrade of new distribution systems.

The DC SeT device has obtained the first complete type test report in China. Its parameters meet national standards and grid bidding specifications. It is capable of multiple applications, including AC/DC hybrid distribution networks, zero-carbon industrial parks, highway microgrids, and green hydrogen applications.

3rd H2: Typical Application Scenarios

AC/DC hybrid distribution networks: Suitable for flexible switch stations, supporting complex multi-terminal grid architectures such as star and ring configurations, improving renewable energy generation and consumption capacity, and enabling microgrid interconnection.

  • Zero-carbon industrial parks: Supporting industrial park DC system architecture, addressing distributed renewable energy consumption, complex asynchronous grid interconnection, and diverse DC loads, while reducing AC/DC conversion losses.
  • Highway service area microgrids: Optimizing photovoltaic grid connection, long-distance transmission, and DC load power supply, improving local renewable energy consumption and transmission efficiency.
  • Green hydrogen and electrolytic aluminum industries: Direct DC power supply solutions can reduce conversion steps, increasing system efficiency from 80.1% in traditional AC solutions to 89.3%, thereby reducing energy losses.
  • These application cases fully demonstrate the core value of Schneider Electric's flexible DC technology in improving energy efficiency, enhancing power supply reliability, and supporting the integration of renewable energy.

4th H2: Technical Advantages and Industry Significance

Schneider Electric's DC SeT medium-voltage DC equipment offers the following advantages:

  • High reliability: The combination of mechanical switching and vacuum arc extinguishing technology ensures safe system operation.
  • Flexible scalability: Supports interconnection of complex multi-terminal power grids and microgrids.
  • Low loss: The DC architecture reduces AC/DC conversion steps, improving overall system efficiency.
  • Multi-scenario applicability: Applicable in various scenarios, from industrial parks and transportation microgrids to the green hydrogen industry.
  • Standard certification: Compliance with domestic and international technical specifications ensures smooth project implementation.

Through these advantages, Schneider Electric provides the industry with replicable and scalable technical solutions for the construction of new power distribution systems, promoting the development of green, low-carbon, flexible, and efficient power grids.

5th H2: Future Outlook

With the continued development of new power systems and the increasing penetration of renewable energy, flexible DC technology will see a broader application space. Schneider Electric will continue to optimize the performance of medium-voltage DC switchgear, driven by technological innovation and guided by application-specific needs. Through more reliable protection, smarter management, and more flexible solutions, we will support the upgrade of flexible grids and promote the construction of a sustainable future grid.

Conclusion

Schneider Electric, with innovative flexible DC technology at its core, is promoting the construction of new distribution systems, enhancing renewable energy absorption capacity and grid reliability. Whether for industrial parks, transportation microgrids, or the green hydrogen industry, DC SeT medium-voltage DC equipment provides reliable, efficient, and flexible solutions, contributing to the development of a green and low-carbon power grid.


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