Methodology for the analysis of dc-network resonance-related instabilities in voltage-source converter-based multi-terminal HVDC systems
Artikel i vetenskaplig tidskrift, 2018

A method to investigate dc-network instabilities in multi-terminal high-voltage DC (HVDC) systems is presented. The method consists of defining subsystems, called in this Letter Z and Y, which can be interpreted as a dc-network impedance matrix and as set of converter admittances, respectively. Through the analysis of the Z and Y terms, it is shown that resonances originated from the system's dc network can be amplified if the converters show a negative dc-side conductance. Moreover, it is also shown that converters located at different terminals can contribute to instability if the resonances to which they are exposed are of the same frequency. The analysis method is applied to a four-terminal HVDC system as an example and, using the theory developed in this Letter, mitigation measures are applied. The results are verified through time-domain simulations.

HVDC power convertors

converter admittances

dc-network impedance matrix

HVDC power transmission

four-terminal HVDC system

Y term analysis

negative dc-side susceptance

impedance matrix

Z term analysis

electric admittance

voltage-source convertors

mitigation measures

voltage-source converter-based multiterminal HVDC systems

dc-network resonance-related instabilities

Författare

Gustavo Pinares

Elnät och komponenter

Massimo Bongiorno

Elnät och komponenter

IET Generation, Transmission and Distribution

1751-8687 (ISSN) 1751-8695 (eISSN)

Vol. 12 1 170-177

Ämneskategorier

Datorteknik

Telekommunikation

Annan elektroteknik och elektronik

DOI

10.1049/IET-GTD.2017.0491

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2022-08-23