Active Compensation of the Input Filter Capacitor Current in Single-Phase PFC Boost Converters

Most single-phase inverters, being sourced by fuel cell stacks (FCSs), subject the stacks to reflected low-frequency (120 Hz) current ripples that ride on average dc currents. The ripple current impacts the sizing and efficiency of the FCS. As such and typically, a passive or active filter is required at the input of the inverter (or output of the FCS) to mitigate the ripple current. Toward that end, this paper outlines a guideline to choose the optimum size of a passive input-filter capacitor for a fuel-cell-based power system from the standpoints of the overall system energy density and cost. Detailed case-specific simulation results, based on an analytical approach, are provided to illustrate key issues for both unity power factor as well as harmonic loads.

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A Harmonic Analysis of Single-Phase Rectifier with a DC Filter Capacitor.

IEEJ Transactions on Industry Applications ◽

10.1541/ieejias.112.523 ◽

1992 ◽

Vol 112 (6) ◽

pp. 523-529 ◽

Cited By ~ 3

Author(s):

Masaaki Sakui ◽

Toshihiro Kitamura ◽

Hiroshi Fujita

Keyword(s):

Harmonic Analysis ◽

Single Phase ◽

Filter Capacitor ◽

Single Phase Rectifier

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Modeling and Simulation of Closed Loop Controlled Parallel Cascaded Buck Boost Converter Inverter Based Solar System

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v6.i3.pp648-656 ◽

2015 ◽

Vol 6 (3) ◽

pp. 648 ◽

Cited By ~ 1

Author(s):

T. Sundar ◽

S. Sankar

Keyword(s):

Solar System ◽

Modeling And Simulation ◽

Single Phase ◽

Closed Loop ◽

Boost Converter ◽

Open Loop ◽

Boost Converters ◽

Closed Loop Systems ◽

Simulink Model ◽

Simulation Results

<p>This Work deals with design, modeling and simulation of parallel cascaded buck boost converter inverter based closed loop controlled solar system. Two buck boost converters are cascaded in parallel to reduce the ripple in DC output. The DC from the solar cell is stepped up using boost converter. The output of the boost converter is converted to 50Hz AC using single phase full bridge inverter. The simulation results of open loop and closed loop systems are compared. This paper has presented a simulink model for closed loop controlled solar system. Parallel cascaded buck boost converter is proposed for solar system.</p>

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Current Phase Lead Compensation in Single-Phase PFC Boost Converters With a Reduced Switching Frequency to Line Frequency Ratio

IEEE Transactions on Power Electronics ◽

10.1109/tpel.2006.886656 ◽

2007 ◽

Vol 22 (1) ◽

pp. 113-119 ◽

Cited By ~ 67

Author(s):

K.P. Louganski ◽

Jih-Sheng Lai

Keyword(s):

Frequency Ratio ◽

Single Phase ◽

Current Phase ◽

Switching Frequency ◽

Boost Converters ◽

Line Frequency ◽

Phase Lead

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A Single-Phase / Three-Phase Transformer Designed for Voltage Detection Unit of 400Hz Converter Excitation Regulator

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1006-1007.967 ◽

2014 ◽

Vol 1006-1007 ◽

pp. 967-971

Author(s):

Yang Lv ◽

Jun Hong Zhang ◽

Jing Hong Zhao

Keyword(s):

Single Phase ◽

Response Speed ◽

Obvious Effect ◽

Ac Motor ◽

Ac Power ◽

Three Phase ◽

Detection Circuit ◽

Excitation Regulator ◽

Filter Capacitor ◽

Detection Unit

Design a single-phase / three-phase transformer designed for voltage detection unit of 400Hz frequency ship converter excitation regulator. Transformer has asimilar structure to AC motor, but the rotor is fixed, a single-phase AC power pass into the rotor and three-phase alternating current generated in the stator side. The transformer is used to the detection circuit of voltage regulator , so that the filter capacitor can be reduced, thereby reducing the latency of signal feedback and improve the response speed of the excitation regulator. The experimental results show that, the transformer has obvious effect on improving the response speed of the circuit.

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Self-Excitation System for Synchronous Generator

Electrical Control and Communication Engineering ◽

10.2478/ecce-2013-0019 ◽

2013 ◽

Vol 4 (1) ◽

pp. 32-37 ◽

Cited By ~ 2

Author(s):

Genadijs Zaleskis ◽

Ivars Rankis ◽

Marcis Prieditis

Keyword(s):

Synchronous Generator ◽

Buck Converter ◽

Excitation Process ◽

Excitation System ◽

Initial Current ◽

Capacitor Discharge ◽

Input Filter ◽

Generator Voltage ◽

Filter Capacitor ◽

Excitation Winding

Abstract Self-excitation for synchronous generator is described in the paper. The system is based on a buck converter input filter capacitor discharge through excitation winding of the generator. The buck converter is connected to the stator outputs through an uncontrollable diode rectifier, but excitation winding is used as a load. Input filter capacitor of the converter provides initial current pulse which magnetizes excitation system and produces the generator voltage increase, for this reason the capacitor is charged before self-excitation process starts. Results of the computer simulation and physical experiment are obtained and presented. These results show that the proposed self-excitation converter in conjunction with an input capacitor pre-charged from a low-power electronic generator actually magnetizes the generator excitation system therefore generator voltage and accordingly excitation current increases. Stabilization of generator output voltage occurs with a voltage surge, though its peak value slightly exceeds the reference one. The future investigation of the proposed self-excitation system may include definition of mathematical equations which describe transients in the generator’s self-excitation mode and development of control methods for purpose of self-excitation process control without voltage peaks. The computer model also should be improved.

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