Variable Voltage Droop Control for MTDC

Over & Under Voltage Containment Reserves
Optimal Primary Voltage Control and Voltage Droop Parameter Selection

Description

This technology proposes a comprehensive methodology for determining the converter droop settings to ensure the voltage security in multi-terminal direct current (MTDC) grid. The novelty lies in the introduction of the concept of over and under voltage containment reserves akin to the frequency containment reserves in AC systems. This not only gives an intuitive understanding of the contribution provided by converters in both rectifying and inverting modes, but also significantly facilitates the procurement of a necessary amount of reserves within their available headroom capacity of power.

TRL SCALE

TRL_3_9_SuperGrid_Institute

Concept validated in analytical evaluation and EMT simulations

Advantages

  • Voltage limit is ensured at any operating point
  • No restriction on operating power for securing headroom margin
  • Extended operability without compromising security

Applications

  • Muti-terminal DC grids
  • HVDC, MVDC

Deliverables

  • Patent FR1760889, WO2019/097183
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