No energy stored power conditioners for voltage sag compensation

Voltage sags can be compensated at low voltage level through using no-energy stored voltage conditioners based on power electronic components. Different compensation principles and power semiconductor devices (SCRs, GTOs, IGBTs) can be used, with different expected performances. This paper illustrates the advantages offered in voltage sag compensation by conditioners based on high switching frequency components and underlines the need for an in-depth voltage sag characterization.