The Effect of the Harmonic Content Generated by AC/DC Modular Multilevel Converters on HVDC Cable Systems
Paper in proceedings, 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.

partial discharges

harmonics

multilevel converters

DC stress

ripple.

PD

Author

P. Romano

University of Palermo

A. Imburgia

University of Palermo

Yuriy Serdyuk

Chalmers, Electrical Engineering, Electric Power Engineering, Power grids and Components

G. Ala

University of Palermo

Jörgen Blennow

Chalmers, Electrical Engineering, Electric Power Engineering

Massimo Bongiorno

Chalmers, Electrical Engineering, Electric Power Engineering, Power grids and Components

C. Grasso

University of Palermo

Thomas Hammarström

Chalmers, Electrical Engineering, Electric Power Engineering, Power grids and Components

G. Rizzo

University of Palermo

Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP

00849162 (ISSN)

666-669 9009685

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

Areas of Advance

Energy

Subject Categories

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/CEIDP47102.2019.9009685

More information

Latest update

10/30/2020