Wang, L.; Cai, D. The Frequency Spectrum Analysis of Wideband Oscillations of Grid-Connected Voltage Source Converter. Sustainability2023, 15, 10210.
Wang, L.; Cai, D. The Frequency Spectrum Analysis of Wideband Oscillations of Grid-Connected Voltage Source Converter. Sustainability 2023, 15, 10210.
Wang, L.; Cai, D. The Frequency Spectrum Analysis of Wideband Oscillations of Grid-Connected Voltage Source Converter. Sustainability2023, 15, 10210.
Wang, L.; Cai, D. The Frequency Spectrum Analysis of Wideband Oscillations of Grid-Connected Voltage Source Converter. Sustainability 2023, 15, 10210.
Abstract
With the widespread application of Voltage Source Converter (VSC) in the power system with high penetration of renewable resources, the problem of wideband oscillations caused by the interaction between the power converters and the power grid has drawn large attention. This paper presents a new methodology for simplifying the mathematical derivations of the impedance model of VSC. Using the new simplified model, the stability and the spectrum characteristic of the performance of the VSC can be clearly analyzed. The proposed second-order d-q impedance model of the grid connected VSC at presence of PLL, not only mathematically proves that the wideband oscillatory modes always occurs in conjugate pairs, but also deliver a clear vision of the physical essence of the wideband oscillations. The classic modal analysis is executed in the paper to demonstrate the stability and frequency spectral characteristics of the wideband oscillations in the VSC integrated system. The impact of control parameters of the VSC on the wideband oscillatory stability is thouroughly analyzed using the results of the modal analysis. The methodology can be considered a powerful tool for the control design of VSC in the modern power system.
Keywords
Voltage Source Converter (VSC); Wideband Oscillations; Equivalent Impedance Model; Modal analysis for VSC
Subject
Engineering, Electrical and Electronic Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
