Abstract
This article presents the results of comparative studies of existing methods to calculate the inductance of dynamic and static single-phase reactors of arc extinguishing by double-rod and armored magnetic circuits with non-magnetic gaps in terms of the geometric parameters of the device. There are proposed expressions to correct the determination of the effective area of the winding of reactors by the shunting magnetic flux. On the basis of numerical calculations, the significant influence of the correct calculation of the effective area of the reactor winding by the shunt magnetic flux on the result of calculating the inductance is shown, it undoubtedly affecting the accuracy of the operation of both many digital devices of existing substations in particular, and new digital substations being introduced in general. It was also found in the work, that carrying out the correct calculation will improve both electrical characteristics of the device, and technical economic indicators of capacitive current compensation systems as part of digital substations, when setting the inverse problem of determining the geometric dimensions of the electrical part of the reactor according to the known inductance value, which depends and is calculated on the parameters of the given network, including capacitive currents.
Highlights
It is known that in ensuring the reliable operation of medium voltage high-voltage networks the role of electric reactors, called Petersen coils [1, 2], is of great and fundamental importance in the fight against capacitive currents of the electric network and the consequences of single-phase earth faults
We note that a little more than 100 years ago, the first scientific works were published in the field of limiting capacitive current and suppressing the earth fault arc using an inductor [1,2,3], later called an arc suppression reactor
There is a made attempt to compare the ways and methods to study electric reactors proposed by various authors and applied to reactors with armored and rod magnetic circuits
Summary
It is known that in ensuring the reliable operation of medium voltage high-voltage networks the role of electric reactors, called Petersen coils [1, 2], is of great and fundamental importance in the fight against capacitive currents of the electric network and the consequences of single-phase earth faults. We note that a little more than 100 years ago, the first scientific works were published in the field of limiting capacitive current and suppressing the earth fault arc using an inductor [1,2,3], later called an arc suppression reactor. From the scientific literature available to the authors in the field of research of electric reactors, in our opinion, one of the fundamental foreign and domestic studies reflecting the most complete calculation methodology for reactors with a steel magnetic core and gaps (Fig. 1) are determined the works [3,4,5,6,7,8,9]. As well as in the comparative description of the works of other authors, which differ from [9] for the purpose of a uniform perception of this material
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