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Information × Registration Number 0220U101375, 0119U100839 , R & D reports Title Improving the efficiency of contour shielding of the magnetic field of three-phase cable lines in the zones of connecting couplings popup.stage_title Head Rozov Volodymyr Yu., Доктор технічних наук Registration Date 10-02-2020 Organization State Institution "Institute technical problems magnetism of the National academy of sciences of Ukraine" popup.description2  The cable line magnetic field in areas of connecting couplings is the object of research. The goal of the project is to develop new methods and equipment of contour shielding of the magnetic field of three-phase cable lines in the areas of connecting couplings, which allow to realize high screening efficiency without limiting the current-carrying capacity of cable lines. The following research methods were used: methods of theoretical electrical engineering, methods of mathematical physics, the finite elements method, methods of experiment planning. The analysis of known methods and equipment of the magnetic field shielding for cable lines in areas of the connecting couplings was carried out within the project. The most effective known systems of the magnetic field shielding for cable lines in areas of the connecting couplings were determined. Theoretical and experimental studies of the efficiency of magnetic field contour shielding by systems with ferromagnetic cores were carried out. The conditions of reducing of thermal influence of the shield on the cable line current capacity are determined. As a result, for the first time, the synthesis of an effective single-loop system of power frequency magnetic field shielding for areas of connecting couplings of high-voltage three-phase cable lines is carried out. Due to the developed asymmetric magnetic communication provided by two ferromagnetic cores, the effective single-loop system has high shielding efficiency (about 7). It was experimentally confirmed. Moreover the shield loop is distant from power cables by 0.2-0.3 m and, unlike the best foreign analogues, this allow to eliminate thermal effects on cable line and to avoid cable line capacity reducing. Recommendations on the design of contour shielding systems for cable lines in the areas of the couplings were developed. There were implemented within applied R&D program of NAS of Ukraine "Intelligent ecologically safe energy with traditional and renewable energy Product Description popup.authors Ivlieva Liubov F. Grinchenko Volodymyr S. Gretskykh Svitlana V. Grischenko Olexandr A. Rozov Volodymyr Yu. Tkachenko Oleksandr O. popup.nrat_date 2020-04-02 Close