Impedance-Based Resonance Analysis in a VSC-HVDC System

Author

Ling Xu ; Lingling Fan

Author_Institution

Dept. of Electr. Eng., Univ. of South Florida, Tampa, FL, USA

Volume

28

Issue

4

fYear

2013

fDate

Oct. 2013

Firstpage

2209

Lastpage

2216

Abstract

Resonances can limit power transfer in a voltage-source converter-high voltage dc (VSC-HVDC) system. The objective of this paper is to develop impedance models for the rectifier ac system and the inverter ac system for a VSC-HVDC system. Resonance stability will be examined using Nyquist stability criterion and impedance frequency responses. The impedance models consider the outer control loop and the inner current control loops of VSCs. Impacting factors are then examined. Stability analysis demonstrates that the feedforward filter, line length, and power transfer level have a significant impact on resonances. Time-domain simulation results obtained by Matlab SimPowerSystems are used to validate the analysis.

Keywords

HVDC power convertors; HVDC power transmission; electric current control; frequency response; invertors; power transmission control; rectifying circuits; time-domain analysis; Matlab SimPowerSystems; Nyquist stability criterion; VSC-HVDC system; feedforward filter; impedance frequency response; impedance model; impedance-based resonance analysis; inner current control loop; inverter AC system; line length; outer control loop; power transfer level; rectifier AC system; resonance stability; stability analysis; time-domain simulation; voltage source converter-high-voltage DC system; Admittance; HVDC transmission; Impedance; Power conversion; Power system stability; Resonance; Stability analysis; Voltage control; Admittance; impedance; resonance stability; voltage-source converter-high voltage dc (VSC-HVDC);

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2013.2272382

Filename

6562813