P. K. Steimer

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The three-level neutral-point-clamped voltage-source converter (NPC VSC) is widely used in high-power medium-voltage (MV) applications. To overcome its major drawback - the unequal loss distribution among the semiconductors - the use of active NPC (ANPC) switches was previously proposed. In this paper, a simple feedforward loss-control scheme for the ANPC(More)
Multilevel power conversion has been receiving increasing attention in the past few years for high power applications. Numerous topologies and modulation strategies have been introduced and studied extensively for utility and drive applications in the recent literature. These converters are suitable in high voltage and high power applications due to their(More)
In the field of power electronics the power electronics building block (PEBB) is a key functional component. With regard to the applications, it is of outmost importance that the PEBB technology used is compact, cost-effective and reliable. The IGCT is at the forefront of technology in high power, medium-voltage applications. For further improvement in size(More)
The integrated gate commutated thyristor (IGCT) has steadily gained importance on the market since its introduction in 1996. Low on-state voltages and fast switching transients offer minimal semiconductor losses and the highest silicon utilization in medium voltage applications. The low component count in the reliable press-pack and the high utilization of(More)
This article describes the requirements, semiconductor design, and the characteristics of the first 10-kV integrated gate commutated thyristors (IGCT) for 6- to 7.2 kV, three-level NPC voltage source converters. It is shown that the use of 10-kV IGCTs enables the reduction of the total number of the main power components and also the reliability of the(More)
The two most popular topologies used to interface the DC voltage sources such as battery energy storage systems (BESS), fuel cells with the AC network are the single and two stage topologies. In case of the single stage topology the BESS or the fuel cell system is directly connected to the dc link of a voltage source converter and the voltage source(More)
Renewables are playing an increasing role for the future electrical energy production. As the respective windparks are growing in size, the efficiency in the power collection network gets of increasing interest. To improve the power collection efficiency in high power windparks, it is proposed to move higher voltage levels closer to the single wind(More)
The paper presents the design, simulation and realization of a 6 MVA neutral-point-clamped (NPC) converter equipped with so called integrated gate commutated thyristors (IGCT). The main design target specifications are: reliability, price, efficiency and dynamic behavior. The present topology incorporates special designed power semiconductors capable to(More)
This paper presents the modeling, detailed simulation, and test of an efficient medium-voltage adjustable-speed drive. The system consists of a three-level neutral-point-clamped inverter supplied by a 12-pulse rectifier. To achieve a motor-friendly supply, an LC filter is inserted between inverter output terminals and induction motor terminals. A direct(More)