Harmonic Stability Assessment for Multi-Paralleled, Grid-Connected Inverters

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Abstrakt

This paper investigates the dynamic interactions of current controllers for multi-paralleled, grid-connected inverters. The consequent harmonics instability phenomena, which features with oscillations above the fundamental frequency, are evaluated by the impedance-based stability criterion. The frequency range of effective impedance-based stability analysis is first identified. The effect of each inverter on the system harmonic instability is then identified by case studies on different groups of inverters. Lastly, the PSCAD/EMTDC simulations on a system with five passivelydamped, LCL-filtered inverters are performed to verify theoretical analysis. It shows that the impedance-based stability analysis results agree with the time-domain simualtions provided that the frequency of concerns are around the half of the Nyquist sampling frequency.
OriginalsprogEngelsk
TitelProceedings of the IEEE International Power Electronics and Application Conference and Exposition (IEEE PEAC'14)
Antal sider6
ForlagIEEE Press
Publikationsdatonov. 2014
Sider1098-1103
ISBN (Trykt)978-1-4799-6768-1
DOI
StatusUdgivet - nov. 2014
BegivenhedIEEE International Power Electronics and Application Conference and Exposition (IEEE PEAC'14) - Shanghai, Kina
Varighed: 5 nov. 20148 nov. 2014

Konference

KonferenceIEEE International Power Electronics and Application Conference and Exposition (IEEE PEAC'14)
LandKina
ByShanghai
Periode05/11/201408/11/2014

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