Abstract
As an important research topic of ship electric propulsion and new power generation, high-temperature superconducting (HTS) machines have become a research hotspot in the field of HTS applications in recent years. With high power density, high efficiency, and outstanding dynamic characteristics, HTS motors could bring much more great social and economic benefits. Meanwhile, the application conditions of HTS materials are harsh, and any parameters of the HTS materials beyond the safe range of operation are probable to lead the HTS materials to quench. The quenching of HTS materials changes the state parameters of power devices; what's more, it will bring a huge impact on the safety and stability of HTS power system. To ensure the safe operation of the HTS machine, by detecting the voltage, environment temperature, and liquid nitrogen level, this paper designed a wireless online monitoring system to determine whether the HTS material has failed. The system is based on the brief principle of superconductor quench. In addition, the system was applied to a 500-kW HTS power generator. The experiment shows the sufficient accuracy and reliability of the wireless online monitoring system.
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