Como evitar os custos operacionais através da mitigação das harmónicas em ambientes industriais?

Schneider Electric

Como evitar os custos operacionais através da mitigação das harmónicas em ambientes industriais?

Publicado: 17 de fevereiro de 2014 · Categoria: Cadernos técnicos

Deste documento

by Karl Kaiser Executive summary Industrial sites suffer from margin erosion because operations and equipment costs are not efficiently controlled. For example, premature equipment replacement, caused by excessive current and voltage distortion, can add up to 15% in CAPEX and 10% in OPEX costs. Such costs can be avoided if the proper harmonic mitigation solution is implemented. This paper reviews several approaches to harmonic mitigation and identifies best practices. 998-2095-09-23-13AR0 Operational Cost Avoidance through Harmonic Mitigation in Industrial Environments Introduction Harmonics are unwanted currents that overload wiring and transformers, creating heat and, in extreme cases, fire. These currents are harmful to equipment. They weaken the reliability and shorten the life expectancy of equipment exposed to the distortion. In fact, field experience at Schneider Electric has shown that the right choice of harmonic mitigation can result in an estimated CAPEX reduction of up to 15% as well as an OPEX reduction of up to 10%. An ideal mains / utility voltage should be a sinusoidal voltage with constant amplitude and frequency (see Figure 1). This situation rarely exits, however, because of impedances, voltage distortion, and current distortion. In industrial environments, for example, these distortions are caused by the electromagnetic characteristics of the loads that connect to the power distribution system. Two broad categories of load types exist: linear and...