MVDC PLUS – proven technology for the future electrical grid

Transform weak or unstable networks using active elements that control load flow and provide reactive power, into stable grids. Couple grids with different frequencies, voltage levels, and quality through DC link.

• Simple integration of volatile energy sources
• Safeguards the power supply, exchanges power between grids to optimize losses and asset utilization
• ­Stabilizes grids, load flow control, grid-independence
• Improved grid quality
  

Connect islands, platforms or remote areas at a distance of up to 200 km by installing compact and cost-efficient medium-voltage DC connection with a DC link via cable or compact overhead lines.

• ­Reduced costs for transport, storage, and maintenance: e.g., diesel generators
• Cost advantage thanks to higher efficiency compared with HVAC
• ­Reduced CAPEX due to larger MV supplier base and commodities
• Reduced visual and environmental impact (faster approvals and CO₂ reduction)
  

Enhance existing infrastructure by converting from an existing AC to a DC system that enables greater power transfer. Improve grid stability with the MVDC PLUS System that provides STATCOM functionality.

• Avoid network expansions
• Increased asset utilization with 20-80 percent more transmitted power
• MVDC PLUS converters provide grid stabilization features
  

Fulfil the enhanced tasks of a DSO by establishing direct MV DC transmission links and additional grid nodes.

• Become more HV-independent
• More flexibility for line planning
• Enhanced options for integrating decentral energy supply
  

Combine network upgrades with minimal visual impact: Medium voltage level allows lines below treetop level (< 15 m in height), and simple MV overhead lines use smaller corridors – available with wooden poles or simple steel structures.

• Minimum visual impact
• Faster and less complex implementation that speeds up construction and permitting
• Gain public acceptance for infrastructure upgrades
• Reduce stranded planning investments

MVDC PLUS is based on proven HVDC PLUS technology, standardized for different type rates with positive effects on costs and execution time. The DC converter stations are realized with multi-level voltage-sourced converters, enabling bi-directional power flows. Additionally both converter stations can operate as static compensators.

• MVDC PLUS combines the best of AC and DC transmission
• Modular multi-level converters ensure stable power quality