Design and development of acceleration grid power supply-conversion system for CFETR N-NBI

Abstract The acceleration grid power supply (AGPS) is developed to provide accelerator power for China Fusion Experimental Rector (CFETR) Negative-ion Neutral Beam Injection (N-NBI) system. The rated output parameters of this AGPS are -1000kV/80A/80MW. The preliminary design of the AGPS is proposed in this paper. To improve the steady-state and dynamic performance of the AGPS, a new CFETR AGPS conversion system (AGPS-CS) based on three-level neutral point clamped (3L-NPC) rectifier and five-level neutral-point-clamped/cascaded H-bridge (5L-NPC/H) inverter is presented. The parameters of AGPS-CS are obtained theoretically, and simulations are used to verify its operational performance and show the effectiveness of the proposed topology. Results indicate that the proposed design provides good input-output features and can meet the requirements of the CFETR N-NBI system. This solution can also be used as a reference for the design of large-power high-voltage power supply.

[1]  Bo Qu,et al.  Impact of DC-Link Voltage Ripples on the Machine-Side Performance in NPC H-Bridge Topology , 2016 .

[2]  Keishi Sakamoto,et al.  Design of a ―1 MV dc UHV power supply for ITER NBI , 2009 .

[3]  Yuan Pan,et al.  Design of acceleration grid power supply for CFETR negative-ion-based neutral beam injection prototype , 2019, Fusion Engineering and Design.

[4]  J.O. Pontt,et al.  Mitigation of noneliminated harmonics of SHEPWM three-level multipulse three-phase active front end converters with low switching frequency for meeting standard IEEE-519-92 , 2004, IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03..

[5]  Masaya Hanada,et al.  Development and design of the negative-ion-based NBI for JT-60 Super Advanced , 2010 .

[6]  V. Toigo,et al.  Progress of the ITER NBI acceleration grid power supply reference design , 2013 .

[7]  V. Toigo,et al.  Assessment of performance of the acceleration grid power supply of the ITER neutral beam injector , 2009 .

[8]  Frede Blaabjerg,et al.  Reliability of Capacitors for DC-Link Applications in Power Electronic Converters—An Overview , 2014, IEEE Transactions on Industry Applications.

[9]  Claudio Finotti,et al.  Acceleration grid power supply conversion system of the MITICA neutral beam injector: On site integration activities and tests , 2019, Fusion Engineering and Design.

[10]  Farhat Fnaiech,et al.  Linear and Nonlinear Control Techniques for a Three-Phase Three-Level NPC Boost Rectifier , 2006, IEEE Transactions on Industrial Electronics.

[11]  Kexun Yu,et al.  Analysis of Output Voltage Ripple of AGPS for CFETR N-NBI Prototype , 2019, IEEE Transactions on Plasma Science.

[12]  Y.T. Song,et al.  Progress of the CFETR design , 2019, Nuclear Fusion.

[13]  Claudio Finotti,et al.  Study of Active-Front-End design for the Acceleration Grid Power Supply of ITER Neutral Beam Injector , 2011, 2011 Twenty-Sixth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[14]  Steffen Bernet,et al.  Design of $LCL$ Filters of Active-Front-End Two-Level Voltage-Source Converters , 2009, IEEE Transactions on Industrial Electronics.

[16]  Alberto Ferro.  Study of the power supply system for the acceleration grids of the iter neutral bean injector , 2011 .

[17]  Keishi Sakamoto,et al.  Development of a dc 1 MV power supply technology for NB injectors , 2006 .

[18]  Rong Zeng,et al.  Analysis and Experiments for IGBT, IEGT, and IGCT in Hybrid DC Circuit Breaker , 2018, IEEE Transactions on Industrial Electronics.

[19]  Kexun Yu,et al.  Modeling and Analysis of Inverter-Type High Voltage Power Supply for NBI Accelerator Grid , 2016, IEEE Transactions on Plasma Science.

[20]  Kexun Yu,et al.  Design of the control system of acceleration grid power supply for CFETR N-NBI prototype , 2019, Fusion Engineering and Design.