Dynamic Virtual Admittance Control

AC-DC system stability control

Description

The proposed solution consists in a HVDC control scheme which dynamically computes the necessary power references for each station of a HVDC link (or grid), allowing to improve the rotor angle stability of the AC grid by damping electro-mechanical oscillations, enlarge transient stability margins and ensuring the synchronization of two AC interconnected networks. It is fully applicable to VSCHVDC (MMC technology), and possibly also to LCC-HVDC.

Status

Maturing project

TRL SCALE

Advantages

  • Easy implementation
  • Applicable for power oscillation damping as well as synchronizing torque (DVAC provides both inter-area oscillations damping and transient stability enhancement)

Applications

  • Enhancement of AC transient stability using HVDC

Deliverables

Patent appl. FR1852136 and FR1853273

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