Análise da qualidade de energia elétrica em uma indústria alimentícia: distúrbios observados nas correntes e tensões durante eventos de interrupção, restabelecimento e operação em regime

Abstract

The Brazilian electrical power generation is concentrated in five main sources: hydroelectric, wind, solar, thermal, and nuclear, supplying to the entire national territoty. The industrial sector ranks among the largest consumers of electrical energy in Brazil, generating impacts on Power Quality (PQ). This study examined PQ in the Motor Control Center (MCC) of a food industry, aiming to analyze five PQ disturbances: steady-state voltage, harmonics, power factor, voltage fluctuation, and frequency variation. The disturbances were analyzed in the extraction MCC, the manufacturing sector responsible for extracting soybean oil, under three proposed scenarios: the factory operating at nominal conditions until motor shutdown, interruption of electrical power supply, and steady-state operation. After analyzing the data, disturbances were observed in two proposed scenarios.