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Flexible DC Interconnection System Solution

Applications

This solution can address issues such as insufficient capacity and overload of distribution transformers in the transformer area, low voltage at the end of the distribution network or overvoltage caused by distributed PV systems, renewable energy integration, and power supply reliability for loads in the transformer area during grid faults. Meanwhile, flexible DC lines can interconnect transformer areas of different voltage levels, facilitating transformer area management.

System Composition

Functional Features

Compact design
Comprehensive information perception
Cost-saving
Grid-forming technology
Coordinated control
Smart management

Cases

Shanxi Yangquan cross-voltage-level flexible DC interconnection

Solving the problem of interleaved parallel operation of 10kV and 6kV voltage levels in mining area distribution networks and their difficult integration.
Real-time power flow control through the smart energy management system enables power mutual support and fault transfer between lines.

Yunnan Kunming transformer area flexible DC interconnection

Solving load imbalance and PV integration issues
Achieving interconnection and mutual support among low-voltage transformer areas, dynamic capacity increase of distribution transformers, and power transfer for critical loads during outages, enhancing power supply reliability and distributed generation hosting capacity

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