Volume 2 - Issue 3, May - June 2026

Voltage fluctuations in commercial electrical distribution systems pose significant risks to sensitive equipment reliability, operational continuity, and facility safety. This study presents a comprehensive performance analysis of Automatic Voltage Regulators (AVRs) deployed across five categories of commercial facilities including hospitals, data centers, shopping malls, office complexes, and manufacturing plants to evaluate their effectiveness in suppressing voltage disturbances and extending the operational lifespan of critical electrical equipment. Field measurements were conducted at twenty-three instrumented sites over a twelve-month period using power quality analyzers conforming to IEC 61000-4-30 Class A standards.Pre-installation and post-installation data were collected for total harmonic voltage distortion (THDV), steady-state voltage deviation, transient overvoltage incidence, and equipment mean time between failures (MTBF). Results indicate that digital microprocessor-based AVRs achieved voltage regulation within plus or minus 0.5% of nominal in all tested environments, reduced THDV by an average of 74.3%, and decreased equipment failure rates by 58 to 81% across facility types. Data centers demonstrated the highest return on investment, with payback periods of 0.7 to 1.1 years. Economic modeling projects cumulative savings of USD 1.2 million over a ten-year period for a representative 500-bed hospital. The findings provide actionable guidelines for AVR selection, sizing, and placement in commercial infrastructure, and contribute a standardized performance benchmarking framework applicable to IEEE 519-2022 and IEC 60038 compliance contexts.

Yunus Idris, Jimoh Abdul Azeez,"Performance Analysis of Automatic Voltage Regulators (AVRs) in Mitigating Voltage Fluctuations and Enhancing the Protection of Critical Electrical Equipment in Commercial Facilities" International Journal of Advanced Multidisciplinary Research and Educational Development, V2(3): Page(1096-1104) May-June 2026. ISSN: 3107-6513. www.ijamred.com. Published by Scientific and Academic Research Publishing.