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Electric characteristics of Aluminum Conductor Steel Reinforced (ACSR) components, aluminum and steel conductivity values, are usually provided by the ACSR manufacturers, but not the steel core permeability. In order to explore how important the steel core permeability is, the paper deals with the impact of this characteristic on ACSR impedance per unit length. For the estimation of this impact, numerous...
Determination of normal magnetization curve is a well known problem, solved and described in many papers. But none of the normal magnetization curve measurements were performed applying current transformer instead of voltage toroidal transformer sample. Comparing the application of current transformer versus the application of voltage transformer, several different procedures and approaches appeared...
Aluminum Conductor Steel Reinforced (ACSR) is usually applied for the power overhead transmission or distribution lines. Electric characteristics of applied materials, like aluminum and steel conductivity values, are always provided by the manufacturers, but not the ACSR steel core permeability. In order to investigate how important the steel core permeability is, this paper deals with the influence...
The application of the modified Takács hysteresis model for numerical modeling of measured hysteresis loops of ferromagnetic material is investigated. In order to better approximate measured hysteresis loops, the Takács model is modified using parameterized Padé approximations of the hyperbolic tangent function. That way, several variants of the modified model are constructed. The experimental data...
Voltage and current measuring transformers must be accurate even in a case when measuring value is not strictly harmonic, but it contains some higher harmonics. For this reason, both measuring transformers must exhibit high linearity. This means that measuring transformers should not contain any ferromagnetic material, which is always nonlinear. Therefore, any measuring transformer must be air-cored...
Aluminum Conductor Steel Reinforced (ACSR) steel core is made of a nonlinear ferromagnetic material and usually, its permeability values are not known. Hence those values must be determined by measurements. For such measurements, two samples of torus transformer were constructed. Applying well known methods, for different primary currents and different frequencies, numerous hysteresis loops were measured...
Electromagnetic pollution is a concern for everyone. The role of the monitoring of time-varying electromagnetic fields in populated areas is to inform the public about non-ionized radiation risks. Monitoring can also be the first step in the investigation and actual exposure assessment in order to provide protection from EM fields. We conducted several electric field measurements in order to obtain...
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