The Effect of the Harmonic Content Generated by AC/DC Modular Multilevel Converters on HVDC Cable Systems
Paper i proceeding, 2019

With the increasing penetration of renewable and decentralized energy sources into the power grid, an extended use of DC voltages is expected on both distribution and transmission
levels. Generation of DC voltages by means of voltage source converters is associated with a wide spectrum of harmonic distortions at converter terminals, both on the ac and on the dc
sides. This can lead to partial discharges in power cables, which deteriorate insulation material thus weakening its performance and reducing cable life-time. In the previously published paper, the effect of harmonic distortion on appearance of partial discharges in cable insulation was evaluated. Here, the study related to the PD behavior has been made focusing on the
influence of multilevel converter parameters such as the number of submodules and the switching frequency chosen to generate different voltage stresses. In addition, effects of using a function generator for producing desired waveform instead of the dSPACE board as in the previous work, are highlighted. In particular, it is shown implementation of the former made it
possible utilizing the Pry-Cam synchronization and thus the realization of the PD pattern.

PD

DC stress

harmonics

ripple.

partial discharges

multilevel converters

Författare

P. Romano

Universita degli Studi di Palermo

A. Imburgia

Universita degli Studi di Palermo

Yuriy Serdyuk

Chalmers, Elektroteknik, Elkraftteknik, Elnät och komponenter

G. Ala

Universita degli Studi di Palermo

Jörgen Blennow

Chalmers, Elektroteknik, Elkraftteknik

Massimo Bongiorno

Chalmers, Elektroteknik, Elkraftteknik, Elnät och komponenter

C. Grasso

Universita degli Studi di Palermo

Thomas Hammarström

Chalmers, Elektroteknik, Elkraftteknik, Elnät och komponenter

G. Rizzo

Universita degli Studi di Palermo

747-750

2019 IEEE Conference on Electrical Insulation and Dielectric Phenomena
Ruchland, USA,

Styrkeområden

Energi

Ämneskategorier

Annan elektroteknik och elektronik

Mer information

Skapat

2019-12-13