Speaker
Description
The large current density of superconducting tape makes it have obvious advantages in improving the quality of power grid, reducing the transmission losses and reducing the floor space of electrical equipment. Large capacity superconducting shunt reactors have the advantages of small size, light weight, low noise and no fire risk. However, the AC loss of superconducting tapes is an important reason to limit the application of large capacity electrical equipment. As for the superconducting shunt reactors, because of the combined action of AC current and the synchronous AC background field on the tape, its AC loss is large, which will significantly improve the operation energy consumption of the reactor, decreases the reliability of long-term operation, and concurrently increases the cooling costs. Therefore, an effective AC loss suppression strategy is needed to optimize the energy consumption of the reactor.
In this paper, based on the filament tapes made by laser cutting technology, simulation and experimental research are carried out to study the HTS tapes and shunt reactor. The sections of the filament tapes are observed by electron microscope to determine the appropriate laser cutting parameters, including laser type, power and speed. The critical current of different filament tapes is tested to ensure the stability of the filament tapes. And the magnetization loss of HTS tapes with different number of filaments is analyzed based on simulation and experimental research. What’s more, a double-cake coil is wound made of filament tapes, which is use as a HTS reactor module coil. Compared with the original reactor coil, the feasibility of tape filamentation in the AC loss optimization is demonstrated. which lays a theoretical foundation for the further cost optimization of the subsequent superconducting toroidal air-core reactor.
