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Focus is on the design and development of an auxiliary power supply converter for HVDC and FACTS applications, utilising integrated gate-commutated thyristors. Due to relatively high requirements for gate drive power and operating voltage of 2.8 kV, special measures have to be considered when designing such systems. The tapped-inductor buck converter topology was chosen as the first non-isolated conversion...
This paper presents a test circuit and methodology suitable for testing high-power half-bridge submodules such as would be used in cascaded converters for high-voltage dc converters. The circuit utilizes a series resonant tank and two half-bridge submodules with voltage and impedance cancellation in order to minimize hardware requirements.
Multilevel converters based on cascaded cells are well suited for high power applications, due to good control performance, extensive modularity and excellent harmonic distortion. A vital requirement in high power converters is being fault-tolerant, so that a single fault in a cell does not lead to the trip of the entire converter. This paper presents a strategy for fault-tolerance on cell level with...
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