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Comparison of Electrostatic Precipitator Power Supplies with Low Effects on the Mains
Thiago B. Soeiro,Thomas Friedli,Jorgen Linner,Per Ranstad,Johann W. Kolar 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
In this article, the distortions caused by the power supplies employed in Electrostatic Precipitators (ESP) are investigated, and means for improving the line power quality are proposed. Multi-pulse and PWM rectifier topologies and other concepts including hybrid systems and active filters are evaluated in order to identify suitable systems for ESP applications. A comparison of the studied systems rated to 60 ㎾ and fully designed employing commercial components is shown. The ESP systems efficiency, power density, current harmonic THD, among others features are used for the assessment. The loss calculations are extended to a variable chip area to allow a fair comparison between the studied systems. Finally, the VIENNA 6-switches rectifier and active filter concepts are chosen and experimental analyses are carried out, verifying the performance and feasibility of the proposed systems.
Comparison of 2- and 3-level Active Filters with Enhanced Bridge-Leg Loss Distribution
Thiago B. Soeiro,Mario Schweizer,Jorgen Linner,Per Ranstad,Johann W. Kolar 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
In this paper an efficiency comparison between 3-phase shunt active filters derived from the 2-level VSC, the 3-level NPC, Active NPC (A-NPC) and the T-type VSC is presented. In order to address the loss distribution issue of the 3-level topologies, while keeping the efficiency of the system high, a space vector modulation scheme incorporating a special clamping of the phase is proposed. It is shown that 3-level active filters can have their losses well distributed over the chip dies, leading to only a small difference in their operating temperatures. Additionally, a semiconductor area based comparison is used to further evaluate the studied active filter systems. Finally, experimental results obtained with a 12kVAr/48㎑ 3-level NPC based shunt active filter employing custom SiC power modules are presented in order to demonstrate the performance and feasibility of this solution.
Application of 1.7-kV 700-A SiC LinPak to Optimize LCL Grid-Tied Converters
Ki-Bum Park,Ralph M. Burkart,Bruno Agostini,Thiago B. Soeiro 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
The current rating of SiC MOSFETs has been increased ever since its introduction. Yet, high current modules for 690-V and beyond grid applications, which would enable the realization of megawatt range converters, are not readily commercially available. Recently, a new high current 1.7-kV SiC MOSFET module suitable for hardparallel connection to increase the current rating has been introduced. This paper investigates the system-level benefit of this module for a 2-level 690-V 1-MW grid-tied converter regarding achievable efficiency and power density and benchmarks the results against the achievable performance with conventional Si IGBTs. The study analyzes in detail the impact of the number of paralleled modules, the choice of the cooling system and the filter design.