Resumo:
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.
