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

Temiz H., Demirok E., KEYSAN O. , Turkay A., Cetinkaya B.

JOURNAL OF ENGINEERING-JOE, ss.4698-4702, 2019 (ESCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: Konu: 18
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1049/joe.2018.9321
  • Sayfa Sayıları: ss.4698-4702


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.