Performance comparison of passive series R and shunt R-C damped LCL filter for grid-connected inverters

Date

2019-07-01

Author

Temiz, Hakan
Demirok, Erhan
Keysan, Ozan
Turkay, Ali
Cetinkaya, Burak

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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LCL filters are widely used in distributed power-generation systems to attenuate high-frequency harmonics caused by pulse-width modulation switching of grid-connected inverters. A resonance occurs due to the series-connected reactive components. In order to damp resonance effects, active and passive damping methods are used. Lower switching frequencies are typically preferred to decrease switching power losses with high-power applications. Thus, control bandwidth of the system is limited and implementation of active damping gets harder. As a result, passive damping methods are commonly used in high-power applications. In this study, performances of two most commonly used passive damping methods which are series R damped and shunt R-C damped are analysed and compared in terms of resonance damping, grid current attenuation at high frequencies, and power losses on damping circuits.

Subject Keywords

Invertors, Power filters, Distributed power generation, Damping, Power grids, Performance comparison, Passive series R, Grid-connected inverters, Distributed power-generation systems, High-frequency harmonics, Pulse-width modulation, Series-connected reactive components, Resonance effects, Passive damping methods, Lower switching frequencies, Switching power losses, High-power applications, Active damping, Resonance damping, Grid current attenuation, High frequencies, Damping circuits, Shunt R-C damped LCL filter

URI

https://hdl.handle.net/11511/32892

Collections

Department of Electrical and Electronics Engineering, Article