Stability Improvement for Multi-inverter System Based on Active Damper with Modified Resonance Detection Method

Jin, Qingren; Yao, Zhiyang; Guo, Min

doi:10.1109/hvdc50696.2020.9292770

Cited by 5 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SOGI-FLL-based resonance detection algorithm in Figure 7 can trace the resonant frequency in real-time (Cao et al, 2018;Jin et al, 2020). The SOGI module in SOGI-FLL also serves as the bandpass filter corresponding to Eq.…”

Section: Sogi-fll-based Adaptive Resonance Detection Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Passivity Enhancement Strategy of Grid-Connected Inverter System Based on the Adaptive Active Damper

Chen

Zhao

2022

Front. Energy Res.

View full text Add to dashboard Cite

The grid-connected inverter system may be unstable when connected to a weak grid, and installing an active damper as a virtual resistor at the PCC is convenient for stabilizing the system. This article proposes a passivity enhancement strategy for the grid-connected inverter system via the adaptive active damper. Furthermore, the admittances of the grid-connected inverter system with the active damper are derived, and the real parts of the admittances of the whole system have been calculated. And the admittance measurement results obtained by the frequency scanning method approximately match the theoretical results. Additionally, the virtual resistor’s stability region is discussed, the bandwidth of the phase-locked loop is recommended, ensuring the stabilizing effect of the active damper under the weak grid. And the online resonance frequency detection algorithm guarantees the passivity enhancement of the active damper when grid impedance changes. Finally, controller hardware-in-the-loop tests validate the theoretical analysis of passivity enhancement based on the active damper.

show abstract

Section: Sogi-fll-based Adaptive Resonance Detection Methodsmentioning

confidence: 99%

“…However, the virtual capacitor requires a differential operation, inevitably amplifying the computational noises. In Jin et al (2020), a cascaded SOGI-FLL with pre-filter is adopted to detect the unstable frequency region in real-time.…”

Section: Introductionmentioning

confidence: 99%