Impact of primary frequency droop coefficients on Lyapunov stability of linearized asynchronous AC-MTDC system

In this paper, requirement on frequency droop coefficients for the stability of AC-MTDC system is studied. Two models, each with a certain level of modeling detail are employed. One is a simplified Nth-order model and the other is detailed full-order model. Using the Nth-order model, stability boundaries for several cases are numerically constructed in the space of frequency droop coefficients. Based on observation made form these boundaries, necessary and sufficient condition for stability is hypothesized. The 'Stability Hypothesis' is then proved for a couple of specific cases using Lyapunov method. Finally, the detailed model is used to validated the hypothesis in a practical setup through time-domain simulations.

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Work Title Impact of primary frequency droop coefficients on Lyapunov stability of linearized asynchronous AC-MTDC system
Access
Open Access
Creators
  1. Sai Gopal Vennelaganti
  2. Nilanjan Ray Chaudhuri
Keyword
  1. MTDC
  2. Stability
  3. Droop
  4. HVDC
  5. Frequency support
  6. Stability boundary
License In Copyright (Rights Reserved)
Work Type Conference Proceeding
Publisher
  1. 2020 IEEE Power & Energy Society General Meeting (PESGM)
Publication Date December 16, 2020
Publisher Identifier (DOI)
  1. https://doi.org/10.1109/PESGM41954.2020.9281582
Deposited July 04, 2023

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Version 1
published

  • Created
  • Added SubmittedVersion.pdf
  • Added Creator Sai Gopal Vennelaganti
  • Added Creator Nilanjan Ray Chaudhuri
  • Published
  • Updated Work Title, Keyword, Publisher, and 1 more Show Changes
    Work Title
    • Impact of primary frequency droop coefficients on lyapunov stability of linearized asynchronous AC-MTDC system
    • Impact of primary frequency droop coefficients on Lyapunov stability of linearized asynchronous AC-MTDC system
    Keyword
    • MTDC, Stability, Droop, HVDC, Frequency support, Stability boundary
    Publisher
    • 2020 IEEE Power & Energy Society General Meeting (PESGM)
    Publication Date
    • 2020-08-02
    • 2020-12-16
  • Updated