Medição das perdas em reatores com núcleo de ar tipo seco pelo método da termografia infravermelha

Abstract

Dry-type air-core reactors, as well as capacitors, are basic elements and an integral part of the electrical distribution and the power transmission system. In addition to providing reactive power to the electrical system, this type of reactor has a wide field of application such as: short-circuit current limiter, Inrush current limiter (for capacitors and motors), harmonic filters, VAR compensation, Ripple reduction or smoothing, blocking coils, neutral grounding, switching transient damping, arc furnace, Flicker reduction, circuit tuning, charging balance etc. Depending on their function, the reactors are connected in series or in parallel with the network. The reactors can be connected directly to a network (shunt reactors, current limiters) or in conjunction with other basic components, such as power capacitors (harmonic filters, shunt capacitors, discharge current limiters, neutral ground). Dry-type air core reactors can be installed at any industrial plant, distribution or transmission voltage level and can range from a few amps to tens of thousands of amps and short-circuit current levels of up to hundreds of numbers of amps. Due to the wide application of the dry-type air-core reactor in the electrical power system, the cost considerations related to the losses inherent in the winding and the induced losses has fundamental importance in the design of the equipment design and in the measurements of routines performed during the process manufacturing. This dissertation aims to present a methodology to perform a measurement of the total losses (in the windings) using an Infrared Thermography in reactors with a dry-type air-core composed of a single cylinder. By making a comparison between the project carried out, measured and by the proposed methodology, it will be possible to carry out an evaluation of the work carried out with confirmation of good results.