Szymon Piasecki

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The paper presents control algorithm for AC-DC converter operating as an interface between the Grid and Distributed Sources. Control algorithm is intended to be applied for serially manufactured AC-DC converters. Algorithm is based on Direct Power Control Space Vector Modulated extended with harmonic and dips compensation functionalities. Simulation and(More)
This paper presents the design process of a 6-kVA quasi-Z-source inverter built with SiC power devices, in particular, employing SiC MOSFETs and SiC Schottky diodes. The main design target is to find the optimal parameters and a good agreement between the efficiency and power density of the converter. The performance of the system may be influenced not only(More)
In this paper three types of the high order line filters dedicated for AC-DC Grid Connected Converter (GCC) are analyzed and compared. According to selected power quality standard and passive components minimization a design procedure is proposed for each described filter topology. Typical LCL filter is compared to LCL with Trap and LLCL line filters with(More)
The paper presents a simulation study of the Support Converter (SC) for passive front-end 55 kVA AC drive, which is aimed to improve the system performance. Most of time, the converter acts as a parallel Active Power Filter (APF) taking advantage from fast SiC devices application. During the regenerative breaking the SC may feed energy back to the supply(More)
This paper presents complete control algorithm for grid-connected Pulse Width Modulated (PWM) AC/DC converter intended for industrial drives and renewable energy applications. The objective of control is to limit current harmonics distortion and provide ride through capability during voltage dips. Following improvements to Voltage Oriented Control are(More)
This paper presents a method for improving the design procedure of AC-DC power converters for power generation applications. The proposed methodology is based on selection of the most convenient configuration, in terms of switching frequency and design of the line filter, in order to minimize the overall losses in the system. In this work two types of(More)
In this paper, the joined reactive power compensator and active filter functionality, of a grid connected two level Voltage Source Converter (VSC), is explored. This VSC, fulfills two different objectives: Compensate current harmonics demanded by non-linear loads (active filter application) and exchange reactive power with a grid subjected to balanced and(More)
The paper presents a SiC-based 10 kVA AC/DC converter and its experimental verification during various operation modes when is connected to the 3x 400V grid. Besides a standard feature of the AC/DC converter - bidirectional power flow - new functionalities are enabled: a compensation of highorder harmonics and reactive power, a fast response to step load(More)
The paper presents advanced grid filters used for AC-DC converters supported distributed generation systems. Analyzed filters are based on the LCL filter and extended by additional frequency traps for attenuation of the harmonics related to switching frequency. For each presented filter methodology of the parameters selection is proposed. Finally, the(More)
This paper presents complete control algorithm for grid-connected Pulse Width Modulated (PWM) 3-level BtB (back to back) converter intended for industrial drives and renewable energy applications. The objective of control is to limit current harmonics distortion and provide ride through capability during voltage dips. Moreover, Maximum Power Point Tracking(More)