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Voltage multiplier factor circuits area unit wide employed in several high-voltage/low-current applications this paper proposes a hybrid SVM (HSVM) for dc high-voltage applications. The multiplier factor is made by cascading a diode-bridge rectifier associated an (symmetrical voltage multiplier factor) SVM with diode-bridge rectifier because the initial stage of multiplier. The planned topology saves 2 high-voltage capacitors and needs just one secondary of HVT. Besides, it's lesser free fall and quicker transient response at start-up, compared with typical SVM. [ABSTRACT FROM AUTHOR]

Series Z-Source network, Associate in Nursing enlargement of the favored conception of Z-source dc link, was initially projected for enhancing the output voltage of power electronic inverters. Throughout this paper, that concept is extended on a three-phase indirect matrix converter. The converter depends on the ultra-sparse matrix topology characterized by the minimum vary of semiconductor switches. The series Z-source network is placed between the three-switch input rectifier stage and additionally the six-switch output electrical converter stage, in either the positive or negative rail. A short shoot-through state produces the voltage boost. Associate in Nursing optimum pulse breadth modulation technique is developed for higher boosting capability of the converter and reduce of switch losses. A comparison is made between the matrix converters mistreatment series and customary cascade Z-source networks. The inpouring current and Z-source capacitor's voltage are reduced inside the series Z-source matrix converter. [ABSTRACT FROM AUTHOR]

This research proposes a change of magnitude dc-dc device supporting the Cockcroft-Walton (CW) voltage number while not a transformer, providing continuous input current, with low ripple, high voltage, quantitative relation and low voltage stress on the switches, diodes, and capacitors. The projected device should be appropriate for applying to low-input-level dc generation systems. In this study, the projected management strategy employs 2 freelance frequencies, one that operates at high frequency to attenuate the scale of the inductance and an opposite one that operates at the comparatively low frequency in keeping with the required output voltage ripple. [ABSTRACT FROM AUTHOR]

Maintaining a strategic distance from the PQ aggravation and upgrading the PQ are the troublesome assignments. More power hardware gadgets are utilized to overcome the PQ unsettling inuences. Multi converter - Unified power quality conditioner (MC-UPQC) is one of the new power gadgets that are utilized for improving the PQ. The framework can be connected to contiguous feeders to adjust for supply-voltage and load current defects on the principle feeder and full pay of supply voltage blemishes on alternate feeders. In the proposed design, all converters are associated consecutive on the dc side and offer a typical dc-interface capacitor. Offering to one DC connect capacitor. The releasing time of DC connect capacitor is high, thus it is the fundamental issue in MC-UPQC gadget. To wipe out this issue, an upgraded ANN based MC-UPQC is proposed in this work. The transient reaction of the PI dc-connect voltage controller is moderate. In this way, a quick acting dc-connect voltage controller in light of the vitality of a dc-interface capacitor is proposed. The transient reaction of this controller is quick when contrasted with that of the regular dc-connect voltage controller. By utilizing uffy rationale controller rather than the PI controller the transient reaction is moved forward. The DC capacitor charging yield voltage is expanded and the reaction is quick when contrasted and PI by utilizing the ANN controller and subsequently, the PQ of the framework is improved. [ABSTRACT FROM AUTHOR]

In recent years, due to energy crisis, renewable energy distributed power generators, such as wind turbine, photovoltaic (PV) cell, fuel cell, and thermoelectric generation modules, are becoming more and more popular in industrial and residential applications. Many renewable energy such as PV cell, fuel cell and thermoelectric generation can only output dc voltage. So an inverter interface has to be utilized for grid-connected applications. So many inverter topologies have been proposed and reviewed recently like as Z-source proposed inverter. In this proposed semi-Z-source inverters for a single-phase photovoltaic (PV) system. With low cost and doubly grounded features. These semi-Z-source inverters only two active switches. To achieve the same output voltage as the traditional voltage-fed full-bridge z-source inverter. The input dc source and the output ac voltage of the semi-Z-source inverter share the same ground. Thus lead into less leakage ground current advantages over other non-doubly grounded inverters. [ABSTRACT FROM AUTHOR]

Concerns over environment and increased demand of energy have led the world to think about alternate energy sources such as wind, hydro, solar and fuel cells. Out of these, photovoltaic (PV) power generation systems have become increasingly important all over the world due its availability, cleanness, low maintenance cost and inexhaustible nature. But power produced by the photovoltaic system is stochastic in nature due to the variation of solar irradiation and cell temperature throughout the day. In order to track the varying power, a DC-DC converter with maximum power point tracker (MPPT) is used. Different MPPT algorithms have been proposed for tracking peak power from the PV panel. Selection of adequate DC-DC converter is also an important factor since it has an inuence on overall performance of the PV system. This paper presents a comparative study on the characteristics of different non-isolated DC-DC converters and highlights the various research works that has been done on DC-DC converters based MPPT PV system. Study shows that selection of converter also has an impact on the overall performance of the PV system. Based on the survey and comparative study, selection criteria to choose DC-DC converter for PV system is described in this paper. [ABSTRACT FROM AUTHOR]

In this paper, a photovoltaic (PV) generation system based on Hybrid Multilevel inverter is proposed. Hybrid multilevel inverter gives multilevel operation by using hybrid source, hybrid configuration or hybrid device in such a way to produce output with reduced number of DC sources, high speed capability, low output switching frequency, low switching loss, high conversion efficiency, exibility to enhance and various topologies for different applications. Simulations and analysis are done by the use of MATLAB/SIMULINK software. [ABSTRACT FROM AUTHOR]