High temperature superconductive energy storage coil end radial magnetic field leading device and its method
A radial magnetic field and energy storage coil technology, applied in the direction of superconducting magnets/coils, magnetic objects, electrical components, etc., can solve the problems of difficult magnetic field energy storage, low critical current density, etc., and achieve less magnetic flux leakage and easy processing , small size effect
Inactive Publication Date: 2005-03-02
SOUTHEAST UNIV
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Problems solved by technology
Although the BSCCO / Ag high-temperature superconducting wire currently available in the market is called high temperature, the critical current density at 77K liquid nitrogen temperature is actually small, and it decreases rapidly with the increase of the magnetic field, especially the magnetic field perpendicular to the surface of the superconducting tape. It is difficult to form a practical magnetic field energy storage, which is also a problem that plagues many related research fields
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[0035] The specific technical scheme is as follows:
[0036] Firstly, the electromagnetic field inside the superconducting coil is analyzed and calculated, a magnetic material with high magnetic permeability is selected according to the energy storage density, and a closed magnetic circuit system along the main magnetic force line of the superconducting coil is designed.
[0037] The above-mentioned closed magnetic circuit system is processed into a symmetrical upper iron core 1 and a lower iron core 2 by cylindrical silicon steel blocks. There is an annular rectangular groove 6 on the joint surface for placing the superconducting coil 5 . The upper iron core 1 and the lower iron core 2 of the annular rectangular groove are evenly distributed with small holes 7 for liquid nitrogen circulation. There is also a larger cylindrical hole 3 in the middle of the cylindrical silicon steel block to form the main passage of liquid nitrogen. The section of the ring-shaped rectangular s...
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The invention is a device and method of guiding the end radial magnetic field of a high temperature superconductive energy storage coil, relating to a liquid nitrogen temperature region distributed high-temperature superconductive energy storage device. It uses a top iron core and a bottom iron core as a bracket, arranges a cylindrical hole in the central axes of the two iron cores, arranges an annular rectangular groove between the cylindrical hole and the outer walls of the two iron cores, arranges a superconductive coil in the middle of the groove, and arranges a glass-film alloy ring between the superconductive coil and the groove, fits the mouths of the two iron cores with each other and thus composes the device; and the method: it selects low-coercive force and high-magnetic conductivity magnetic material according to energy storage density, and then designs a closed magnetic circuit around main magnetic lines according to the needed dynamic time constant of system, where the shape of the magnetic circuit is adapted to that of the Dewar in principle, but it should assure the second-order derivative of geometrical shape of a main magnetic circuit is continuous.
Description
technical field [0001] The invention relates to the core technology of D-HT-SMES (Distributed High Temperature Superconducting Magnetic Energy Storage) distributed high-temperature superconducting energy storage device in the liquid nitrogen temperature zone. D-HT-SMES is mainly used in power systems and those that require high power quality important users. Background technique [0002] At present, in more and more power systems, voltage instability has become the biggest threat to the normal operation of the system. Large-scale power outages due to voltage collapse not only have serious social impacts, but also huge economic losses. [0003] The main mechanism of voltage collapse is "Choke Domino Effect"-CDE (Choke Domino Effect) [1] , once CDE occurs, it is difficult to control. When the system is about to collapse, remote reactive power cannot be sent in, and the output power of reactive power sources such as local shunt capacitors decreases ...
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Inventor 陆广香沈国荣
Owner SOUTHEAST UNIV