“CABLE AND WIRES” JOURNAL - 2023 #4
Link to the number in the Scientific Electronic Library ELIBRARY.RU
EDITOR-IN-CHIEF'S COLUMN
E.B. Vasiliev, Cand. Sc. (Economics), Full Member of the Academy of Electrotechnical Sciences of the RF
PROFESSIONAL INDIVIDUALITY AND PROFESSIONAL UNITY
INTERVIEW WITH INDUSTRY LEADERS
SCIENCE AND TECHNOLOGY
DOI 10.52350/2072215Х_2023_4_12
MODERN CONCEPT FOR THE ASSESSMENT OF THE WINDING WIRE RELIABILITY
V.K. Andrianov, Cand. Sc. (Engineering), Department Manager, JSC VNIIKP;
A.V. Andrianov, Head of Laboratory, JSC VNIIKP;
E.V. Bykov, Cand. Sc. (Physics and Mathematics), Technical Director, Ltd. “Electroneftemash”
Abstract. The article analyzes the concept of linear defect density in relation to the description and calculation of the reliability of winding wires. Consideration is given to the statistical model based on the concept of linear density of defects, which makes it possible to link the requirement for the coil reliability with the quality of the winding wire from which this coil is wound.
Key words: Key words: reliability of winding wires, reliability (failure-free operation) and safety of winding wires, reliability index, linear density of defects, ageing and technological impacts
DOI 10.52350/2072215Х_2023_4_18
CALORIMETRIC MEASUREMENTS OF AC LOSSES OF A 2G HTS TRIAXIAL POWER CABLE WITH A MULTILAYER STRUCTURE
A.A. Nosov, Cand. Sc. (Engineering), Senior Research Scientist, JSC VNIIKP;
S.S. Fetisov, Dr. Sc. (Engineering), Department Manager, JSC VNIIKP;
S.Yu. Zanegin, Cand. Sc. (Engineering), Senior Engineer, JSC VNIIKP;
V.V. Zubko, Dr. Sc. (Engineering), Chief Research Scientist, JSC VNIIKP;
V.S. Vysotsky, Dr. Sc. (Engineering), Deputy Division Manager, Research Supervisor, JSC VNIIKP
Abstract. Triaxial HTS AC power cables that incorporate three HTS phases wound around a single core within a single cable are considered an optimal solution for low and medium voltage power cables. In order to increase the power transmitted by a triaxial cable while keeping the cable diameter small enough, it is necessary to increase the operating current by using a multilayer structure in each phase of the cable.
This task requires a complicated optimization analysis to ensure the proper current distribution between the phases and the tape layers in each phase. We have recently developed and tested a triaxial cable in which each phase has two layers made of 2G HTS tapes. The cable tests demonstrated that all the parameters coincided with the calculated values. With an outer diameter of ~24 mm, this is the world's most compact triaxial HTS power cable with critical currents up to ~4 kA per phase, manufactured and tested up to date. Measurement of AC losses by a standard digital electrical method turned out to be difficult for this cable. It was due to the problems of taking into account the distribution and phase shift of currents between all layers of the cable simultaneously.
To perform AC loss measurements, we have developed a test set-up for measuring losses by the calorimetric method. In this paper we present the details of the test set-up and the results of calorimetric measurements of AC losses at different frequencies in the triaxial HTS cable with two layers per phase.
Key words: HTS cables, triaxial cable, multilayer cables, calorimetric measurements
DOI 10.52350/2072215Х_2023_4_27
A.B. Semenov, Dr. Sc. (Engineering), Professor of the Federal State-Funded Educational Institution of Higher Professional Training “Moscow National Research State University of Civil Engineering”;
A.A. Kosilov, Manager for Development of Cooperation, Maillefer
Abstract. The results of experimental studies of the transmission parameters and the effect of a flame-retardant symmetrical LAN-cable under the exposure to open flame are presented. Numerical values of the key transmission parameters degradation are given: insertion attenuation, transient attenuation at the near end and return losses.
It is explained that creation of a full-scale video surveillance and warning system with the direct connection path length of 84 m is possible, provided that the length of the direct flame exposure is limited to 5 m.
Key words: flame-retardant LAN-cable, parameters degradation, transmission and effect parameters
INDUSTRY NEWS
M.V. Meshchanova, Deputy Division Manager, JSC VNIIKP;
THE CABLE INDUSTRY AT THE “ARMY-2023” FORUM
WITH AN ADVANCED EFFECT. “BASHKIR ADVANCE PARTY” OF THE ELECTROCABLE ASSOCIATION
JUBILEES
