LC-StatCom with symmetrical I-V characteristic: Total Harmonic Distortion Study

Abstract

In this paper, the effect of capacitor voltage ripple on current quality in a cascaded H-bridge (CHB) low-capacitance static compensator (LC-StatCom) with symmetrical I-V characteristics is investigated. Total harmonic distortion of the synthesized ac voltage of an H-bridge converter operating with different capacitor voltage ripples is evaluated for both inductive and capacitive operating modes. Simulation-based analyses on a 350-VA three-cell CHB LC-StatCom system are provided to demonstrate LC-StatCom's effectiveness to provide high quality current compared to a conventional StatCom.