Towards HVDC Interoperability - Neutral Current Control for Multiple Terminals

EasyChair Preprint 13292

Abstract

This paper proposes a novel control strategy to eliminate the neutral currents of multiple bipolar terminals in a multi-terminal-multi-vendor HVDC grid. Assisted by DC symmetrical decomposition, the proposed control over neutral current is decoupled from power transfer without the need for access to internal design of converters. A generic mathematical model is derived to quantify the robustness against measurement error of DC current without detailing internal design of converters. Through comparisons between 3 types of Pseudo-steady State simulations with MATLAB/Simulink and Electro-Magnetic Transient (EMT) simulation in the Real Time Digital Simulation (RTDS) environment, the outcomes confirm the applicability of the proposed methodology and feasibility of controlling selected neutral currents for a multi-terminal-multi-vendor HVDC grid.

Keyphrases: DC symmetrical decomposition, HVDC Interoperability, Neutral current control, robustness

@booklet{EasyChair:13292,
  author    = {Dong Chen and Pimonpan Phurappa and Benjamin Marshall and Mohammad Wasim Ahmad and Callum Henderson},
  title     = {Towards HVDC Interoperability - Neutral Current Control for Multiple Terminals},
  howpublished = {EasyChair Preprint 13292},
  year      = {EasyChair, 2024}}