CONTROL AND OPTIMIZATION OF VOLTAGE PROFILES AND SAG MITIGATION IN LOW-VOLTAGE POWER NETWORKS
DOI:
https://doi.org/10.59277/RRST-EE.2026.1.15Keywords:
Voltage regulation, Voltage sag, Active voltage conditioner, Dynamic voltage restorer, Harmonic filtersAbstract
Voltage sags, swells, and fluctuations in low-voltage networks can disrupt sensitive equipment, reduce industrial productivity, and accelerate component aging. This paper reviews common assessment practices, including ITIC/CBEMA curves and waveform analysis, and proposes an enhanced method that also considers pre- and post-event intervals to better quantify disturbance severity and recovery behavior. A disturbance direction detection procedure is presented to support source localization and targeted mitigation. As an alternative to conventional UPS-based solutions, active voltage conditioners (AVC)/dynamic voltage restorers (DVR) are discussed for fast compensation without energy storage and with high tolerance to voltage variations, while not covering complete interruptions. The main contribution is a combined DVR/AVC and active filtering solution that improves voltage stability, power factor, and harmonic content, enabling a cleaner, more reliable supply.
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