Analysis of Harmonic Distortion Levels in Commercial Buildings

This case study presents an analysis of harmonic distortion levels in commercial buildings, focusing on the evaluation of harmonic distortion concerns associated with typical load characteristics. The document categorizes major nonlinear loads into electronic power supplies, fluorescent lighting, and HVAC equipment, and discusses their contributions to harmonic distortion. It outlines the increasing importance of evaluating harmonic distortion due to the prevalence of electronic equipment, high-efficiency fluorescent lighting, and adjustable-speed drives in modern buildings. The study details how these loads can lead to issues such as neutral conductor overheating and transformer overheating, as well as interference with communication systems. Additionally, the document describes the characteristics of harmonic current sources and their effects on the power system, emphasizing the need for proper sizing of neutral conductors to accommodate the increased harmonic currents. Overall, the case study provides a comprehensive examination of the sources and impacts of harmonic distortion in commercial building environments.