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

The Journal of Engineering

  ^{1    2    2    3    3} 

[1] Department of Electrical and Electronics Engineering, Middle East Technical University, Ankara, Turkey;Department of Electrical and Electronics Engineering, Middle East Technical University, Ankara, Turkey;Transportation, Security, Energy and Automation Systems Business Sector, ASELSAN, Ankara, Turkey;Transportation, Security, Energy and Automation Systems Business Sector, ASELSAN, Ankara, Turkey;

关键词: 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;   

DOI  :  10.1049/joe.2018.9321

来源: publisher

【 摘 要 】

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.

【 授权许可】

CC BY