Power Electronics Building Blocks and System Integration
Final rept. 1 Aug 1998-31 May 2000
VIRGINIA POWER ELECTRONICS CENTER BLACKSBURG
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This report can be divided into three parts advanced power semiconductor devices, active IGBT gate driver and high performance drive, and testbed for PEBB system integration. On devices, two-terminal high voltage rectifiers and three-terminal MOS-gated power transistors have been studied different mask designs have been fabricated decent performance and yield have been demonstrated. The research effort on the active gate drive has mainly focused on the integration of the three-stage active gate drive with fast fault current limiting protection circuits to improve the overall reliability of the power converter and reduce conduction loss. Efforts on high-performance drive are devoted to the investigation of control techniques, the simulation and the hardware prototyping of a hybrid seven-level inverter system. Its feasibility as a well-modularized medium-voltage power converter has been experimentally demonstrated. On PEBB system integration testbed, the soft-switched DC bus regulator as been successfully tested under 100kW with 20kHz switching frequency a four-leg secondary utility power supply has been fully implemented and intensively tested with different kinds of loads, including balancedunbalanced, linearnonlinear cases the DC bus conditioner, which decouples the AC dynamic load from the DC distribution bus and improves the system stability, has been constructed and tested the parallel operation of multiple converters in a high-power DPS has been investigated and new control strategy has been proposed a distributed control architecture for PEBB-based system has been proposed and demonstrated for plug and play.
- Electrical and Electronic Equipment
- Computer Systems