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Active power filters have been used to eliminate current harmonics generated by nonlinear loads, because such loads decrease the power quality, but with the growing use of renewable energy sources interconnected to the grid is possible integrate the function of the active power Alter to the grid-connected photovoltaic-system, the functions in a single device. Due to the before mentioned the use of...
(35 words limit) We theoretically investigate the role of group velocity matching in high-order harmonic generation. We introduce the associated walk-off length, and present its scaling with wavelength and pulse duration.
We demonstrate theoretically and experimentally the relevance of the transversal coherence length in high-order harmonic generation (HHG). We present results in which transversal phase matching plays the leading role in the macroscopic HHG.
We model soft x-ray high harmonic generation and propagation driven by mid-infrared lasers. We find that multi-cycle laser pulses are ideal for generating shorter bright isolated attosecond pulses via time-gated phase-matching in high-density extended media.
DC/AC converters are widely used in several applications, currently the DC/AC multilevel configuration has been proposed for high and low power applications. In this paper a single-phase flying capacitor multilevel inverter is analyzed, indeed an asymmetric operation is addressed. A modulation technique is proposed to assure the proper control of the converter, it consists of modifying the carriers...
We present a unified picture of phase matching of high harmonic upconversion spanning the electromagnetic spectrum from the VUV to keV, combining both microscopic and macroscopic physics. We validate this picture with experiment and theory.
We make a review of the high harmonic generation (HHG) process, its characteristics and properties, presenting our main results in the field. The HHG is a very interesting source on the deep ultraviolet region with high potential in applications such as time resolved measurements and high spatial resolution imaging
Currently, the electromagnetic compatibility (EMC) poses the following challenges for photovoltaic-distributed generation (PV-DG) units connected to the distribution network: a) PV-DG equipment should manage emissions as a 'product' with specific tests under a given set of conditions; b) PV-DG units should be incorporated as a 'user', and its emissions managed according to existing allocation practices...
This paper presents a comparative analysis about the command strategies of the fourth leg of the inverter of a three-phase active power filter and why we chose the inverter structure of four branches. The aim is demonstrate the “controllability” of the four branch active filter by controlling the fourth leg. The aims of the different command strategies are both the elimination of the neutral current...
In several applications DC/AC converters are widely used; traditionally they can be classified in voltage source inverters (VSI) and current source inverters (CSI). Their use depends on the application. Other possibility for the DC/AC conversion is the multilevel configuration, and the most analyzed is the VSI. In this paper a multilevel current source inverter (MCSI) is proposed. The operation, analysis...
In cogeneration systems are required converters able to inject current with low harmonic content, traditionally the inverters are considered. In this paper is proposed to use the current source inverter instead of voltage source inverter, this type of inverters can accept a low input voltage to inject current to the AC mains. The operation, simulation results are presented.
Several AC/DC converters have been presented in order to meet the power quality regulations maintaining the lowest number of components with the purpose of minimize the cost and complexity. In this paper the parallel active input current shaper (PAICS) operated in discontinuous conduction mode (DCM) is presented. In difference with the traditional series AICS, the proposed scheme connects the auxiliary...
Several AC/DC converters have been presented in order to meet the power quality regulations maintaining the lowest number of components with the purpose of minimize the cost and complexity. In this paper the parallel active input current shaper (P-AICS) operated in discontinuous conduction mode (DCM) is presented. In difference with the traditional series AICS, the proposed scheme connects the auxiliary...
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