An active damper for stabilizing power electronics-based AC systems

By Xiongfei Wang, Frede Blaabjerg, Marco Liserre, Zhe Chen, Jinwei He, Yun Wei Li. Applied Power Electronics Conference, 2013

213 citations recorded by the source corpus.

The mutual interactions between the parallel grid-connected converters coupled through the grid impedance tend to result in a number of stability and power quality challenges. To address them, this paper proposes an active damper concept based on a low-power, high-bandwidth power converter. The basic idea behind this proposal is to dynamically adjust the grid impedance seen from the point of common coupling of the grid-connected converters, such that the potential instabilities and resonance propagation can be effectively mitigated. Simulation and laboratory tests on three parallel grid-connected converters are carried out. The results validate the stabilizing performance of the active damper.

Subfields: Control and Systems Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/6415e0711b7e44fb18757ed525b6d63bec409224

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In Control and Systems Engineering

In Electrical and Electronic Engineering

Citations in the corpus

Damping Methods for Resonances Caused by LCL-Filter-Based Current-Controlled Grid-Tied Power Inverters: An Overview (2017, unknown): “tion attenuation can also be realized by using the R-APF or the active damper [99].”
Microgrid Stability Definitions, Analysis, and Examples (2020, background): “Another rootcause of harmonic instability is high-frequency switching, triggering parallel and series resonances introduced by LCL power filters or parasitic feeder capacitors [46], [49].”
Modeling and Analysis of Harmonic Stability in an AC Power-Electronics-Based Power System (2014, methodology): “This paper attempts to fill in this gap by expanding the impedance-based analysis to a three-phase meshed and balanced power system, where a voltage-controlled and two current-controlled inverters with LC- and LCL-filters are interconnected.”
Passivity-Based Stability Assessment of Grid-Connected VSCs—An Overview (2016, methodology): “, using eigenvalues [13] or the Nyquist criterion [16]), particularly if the VSCs have different ratings and dynamic properties.”
Impedance-Based Analysis of DC-Link Voltage Dynamics in Voltage-Source Converters (2019, background): “The stability of current control with L-/LCL-filters has been well documented in the literature [4]-[6], which is found highly dependent on the time delay in the digital control system.”