An Adaptive Phase-Locked Loop for the Transient Stability Enhancement of Grid-Connected Voltage Source Converters

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4 Citationer (Scopus)

Abstrakt

The phase-locked loop (PLL) is widely used in voltage source converters (VSCs) for the purpose of grid synchronization. This paper presents a comprehensive analysis of the impact of the PLL on the transient stability of VSCs. By using the phase portrait, the large-signal nonlinear responses of the PLL with different controller parameters after transient disturbances are characterized. It points out that increasing the damping ratio and the settling time of the PLL is beneficial for the transient stability enhancement of VSCs. On the other hand, the parameters of the PLL are also constrained by the small-signal stability and the dynamic performance requirement of the VSC. In order to improve the transient stability of the VSC, an adaptive PLL is proposed in this paper. The method allows the PLL to operate with the pre-designed parameters in the normal operation, yet to increase its damping ratio adaptively during the transient period. Time-domain simulations and experimental tests are given to verify the effectiveness of the theoretical analysis.
OriginalsprogEngelsk
TitelProceedings of the 2018 IEEE Energy Conversion Congress and Exposition (ECCE)
Antal sider7
ForlagIEEE
Publikationsdatosep. 2018
Sider5892-5898
ISBN (Trykt)978-1-4799-7313-2
ISBN (Elektronisk)978-1-4799-7312-5
DOI
StatusUdgivet - sep. 2018
Begivenhed 2018 IEEE Energy Conversion Congress and Exposition: ECCE - Portland, USA
Varighed: 23 sep. 201827 sep. 2018

Konference

Konference 2018 IEEE Energy Conversion Congress and Exposition
LandUSA
ByPortland
Periode23/09/201827/09/2018
NavnIEEE Energy Conversion Congress and Exposition
ISSN2329-3721

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