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| Design of the Circuit in Superconducting Magnet Quench Detection |
| Fang Jin1, Qiu Ming2, Fan Yu1, Wei Bin2, Lu Wenjia1, Wang Yixin1, Yang Yanfang1 |
| 1. Beijing Jiaotong University Beijing 100044 China 2. China Electric Power Research Institute Beijing 100192 China |
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Abstract Quench detection and protection of superconductor is a key problem for the practical application of superconducting electric power technology. In order to achieve the quench detection and protection of superconducting energy storage hybrid magnet, according to the characteristics and structure of hybrid magnet, voltage correction circuit of superconducting energy storage hybrid magnet was proposed based on existing active power detecting method. In this system, partial active power detecting method was adopted and the quench detection came true by isolating, amplifying, filtering and comparing the quench signal etc. The production and debugging of the hardware circuit of quench detection system is completed. Through the configuration of experimental device of high-temperature superconducting coil, the study of the quench detection on high-temperature superconducting energy storage system is conducted. The waveforms of the coil voltage were acquired before and after the calibration of the coil voltage. When coil was charged at different speeds, the effects of charging speed on quenching threshold voltage, quenching starting point and critical current were researched. Experiments waveforms of the coil voltage confirmed that the quench detection system can promptly and effectively detect hybrid superconducting magnet quench.
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Received: 15 September 2011
Published: 20 March 2014
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2012, Vol. 27 
