원문정보
초록
영어
Quench Detection System (QDS) is essential to guarantee the stable operation of the Korea Superconducting Tokamak Advanced Research (KSTAR) Poloidal Field (PF) magnet system because the stored energy in the magnet system is very large. For the fast response, voltage-based QDS has been used. Co-wound voltage sensors and balanced bridge circuits were applied to eliminate the inductive voltages generated during the plasma operation. However, as the inductive voltages are hundreds times higher than the quench detection voltage during the pulse-current operation, Central Difference Averaging (CDA) and MIK, where I and K stand for mutual coupling indexes of different circuits, which is an active cancellation of mutually generated voltages have been suggested and studied. In this paper, the CDA and MIK technique were applied to the KSTAR magnet for PF magnet quench detection. The calculated inductive voltages from the MIK and measured voltages from the CDA circuits were compared to eliminate the inductive voltages at result signals.
목차
1. INTRODUCTION
2. CDA AND MIK
2.1. Basics
2.2. Simple CDA
2.3. 1R type CDA circuit
2.4. 3R type CDA circuit
2.5. MIK calculation
3. CDA+MIK RESULT
3.1. CDA+MIK (1R type)
3.2. MIK+CDA (3R type).
4. CONCLUSION
REFERENCES