TY - GEN
T1 - Dynamic fault detection chassis for the 1MW high voltage converter modulator system at the spallation neutron source
AU - Mize, J. J.
AU - Anderson, D. E.
AU - Hicks, J.
AU - Wezensky, M.
PY - 2007
Y1 - 2007
N2 - The high frequency switching megawatt-class High Voltage Converter Modulator (HVCM) developed by Los Alamos National Laboratory for the Oak Ridge National Laboratory's Spallation Neutron Source (SNS) is now in operation. One of the major problems with the modulator systems is shoot-thru conditions that can occur in an IGBT H-bridge topology resulting in large fault currents and device failure in a few microseconds. The Dynamic Fault Detection Chassis (DFDC) is a fault monitoring system. It monitors transformer flux saturation using a window comparator and dV/dt events on the cathode voltage caused by any abnormality such as capacitor breakdown, transformer primary turns shorts, or dielectric breakdown between the transformer primary and secondary. If faults are detected, the DFDC will inhibit the IGBT gate drives and shut the system down, significantly reducing the possibility of a shoot-thru condition or other equipment damaging events. In this paper, we will present system integration considerations, performance characteristics of the DFDC, and discuss its ability to significantly reduce costly down time for the entire facility.
AB - The high frequency switching megawatt-class High Voltage Converter Modulator (HVCM) developed by Los Alamos National Laboratory for the Oak Ridge National Laboratory's Spallation Neutron Source (SNS) is now in operation. One of the major problems with the modulator systems is shoot-thru conditions that can occur in an IGBT H-bridge topology resulting in large fault currents and device failure in a few microseconds. The Dynamic Fault Detection Chassis (DFDC) is a fault monitoring system. It monitors transformer flux saturation using a window comparator and dV/dt events on the cathode voltage caused by any abnormality such as capacitor breakdown, transformer primary turns shorts, or dielectric breakdown between the transformer primary and secondary. If faults are detected, the DFDC will inhibit the IGBT gate drives and shut the system down, significantly reducing the possibility of a shoot-thru condition or other equipment damaging events. In this paper, we will present system integration considerations, performance characteristics of the DFDC, and discuss its ability to significantly reduce costly down time for the entire facility.
UR - http://www.scopus.com/inward/record.url?scp=51349169482&partnerID=8YFLogxK
U2 - 10.1109/PAC.2007.4441301
DO - 10.1109/PAC.2007.4441301
M3 - Conference contribution
AN - SCOPUS:51349169482
SN - 1424409179
SN - 9781424409174
T3 - Proceedings of the IEEE Particle Accelerator Conference
SP - 2514
EP - 2516
BT - Proceedings of the IEEE Particle Accelerator Conference, PAC07
T2 - IEEE Particle Accelerator Conference, PAC07
Y2 - 25 June 2007 through 29 June 2007
ER -