A novel single-stage single-phase DC uninterruptible power supply with power-factor correction

Rodríguez, E.; Abud, D.; Arau, J.

doi:10.1109/41.808002

Cited by 23 publications

(7 citation statements)

References 8 publications

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“…Ideally, a UPS should be able to provide a regulated output voltage with low THD during UPS mode, draw low THD sinusoidal current from the ac supply at unity power factor under normal mode and seamless transition from one mode to the other [7]. Therefore, under UPS mode, a voltage controller is used to regulate the load voltage and under normal mode, the current control of the converter plays a major role in determining the power quality.…”

Section: Introductionmentioning

confidence: 98%

Control strategy for a single phase bidirectional converter based UPS system using FPGA

Rani

Ilango

Nagamani

et al. 2012

2012 International Conference on Power, Signals, Controls and Computation

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Uninterruptible power supplies are widely used to supply uninterrupted power to the loads under power failure. Typical UPS systems consists of two power converters namely a rectifier/charger which charges the batteries and an inverter to provide an ac sinusoidal output. Employing a single converter for both rectification and inversion process reduces the hardware components. This paper presents a control strategy for the single phase bidirectional converter used in UPS systems. Under normal mode, the grid supplies the loads and charges the battery through the bidirectional converter. The converter is controlled using a hysteresis current controller and a constant current charging technique is used to charge the batteries. Upon grid failure, the battery supplies the load through the converter which operates in voltage control mode to maintain the load voltage. This system offers the advantage of reduced hardware, low harmonic distortion of line current and regulation of load voltage under grid failure. The control strategy is simulated in MATLAB/Simulink and implemented in an ALTERA cyclone II FPGA board. The steady state and the dynamic response of the system are simulated and verified experimentally on the prototype unit built in the laboratory.

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Section: Introductionmentioning

confidence: 98%

Control strategy for a single phase bidirectional converter based UPS system using FPGA

Rani

Ilango

Nagamani

et al. 2012

2012 International Conference on Power, Signals, Controls and Computation

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show abstract

“…The major drawback of this converter is the complexity and higher cost due to the use of two dcdc converters. Futher to achieve high voltage gain, converters with coupled inductors [8]- [13] are proposed but their efficiency are reduced due to losses associated with leakage inductors. Moreover, these converters with coupled inductor requires high voltage ratted switch and also suffers from EMI problems.…”

Section: Introductionmentioning

confidence: 99%

A High Step Up Hybrid Switch Converter Connected With PV Array For High Voltage Applications

Amritashree¹

2015

IJIT

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This paper presents a step up DC-to-DC converter with hybrid switch capacitor technique having high voltage conversion ratio with small switch voltage stress. The converter is suitable for the applications where high voltage conversion is required. The proposed DC-DC converter has low voltage ratted MOSFET switch and is connected to PV array to get high output voltage at small duty ratios. Hence it has high efficiency. The principles of operations and the theoretical analysis are presented in this paper. All the simulations are done in MATLAB-SIMULINK Environment and results were obtained with voltage conversion ratio of 4.9.

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“…Thus, no advantage over the conventional boost converter is achieved. Converters with coupled inductors can achieve a high step-up voltage gain [5]- [8], but their efficiency is degraded due to the losses associated with leakage inductors. Moreover, these converters require a high-voltage-rated switch and suffer from EMI problems.…”

Section: Introductionmentioning

confidence: 99%

Ultra Step-Up DC–DC Converter With Reduced Switch Stress

Fardoun

Ismail

2010

IEEE Trans. on Ind. Applicat.

195

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In this paper, a new single-switch nonisolated dc-dc converter with high voltage transfer gain and reduced semiconductor voltage stress is proposed. The proposed topology utilizes a hybrid switched-capacitor technique for providing a high voltage gain without an extreme switch duty cycle and yet enabling the use of a lower voltage and R DS−ON MOSFET switch so as to reduce cost, switch conduction, and turn-on losses. In addition, the low voltage stress across the diodes allows the use of Schottky rectifiers for alleviating the reverse-recovery current problem, leading to a further reduction in the switching, and conduction losses. The principle of operation and a comparison with other high step-up topologies are presented. Two extensions of the proposed converter are also introduced and discussed. Simulation and experimental results are also presented to demonstrate the effectiveness of the proposed scheme.Index Terms-DC-DC power conversion, high step-up converter, pulsewidth modulated, switched-mode power supplies.

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A novel single-stage single-phase DC uninterruptible power supply with power-factor correction

Cited by 23 publications

References 8 publications

Control strategy for a single phase bidirectional converter based UPS system using FPGA

Control strategy for a single phase bidirectional converter based UPS system using FPGA

A High Step Up Hybrid Switch Converter Connected With PV Array For High Voltage Applications

Ultra Step-Up DC–DC Converter With Reduced Switch Stress

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