High Voltage Stress in Single-Phase Single-Stage PFC Converters: Analysis and an Alternative Solution

Lu, Dylan Dah-Chuan

doi:10.1109/tie.2015.2477051

Cited by 25 publications

(9 citation statements)

References 37 publications

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“…An analysis was performed to explore the reason for the occurrence of high voltage stress in a single-stage power factor correction converter and provide a solution [6,7]. The previous works reported the reason under the steady state condition, but transient performance was not considered [8]. The inherent negative current feedback property in an output inductor causes voltage stress.…”

Section: Literature Surveymentioning

confidence: 99%

Efficient Single-Stage Bridgeless AC to DC Converter Using Grey Wolf Optimization

Kandasamy¹,

Kumar²

2022

Computer Systems Science and Engineering

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Bridgeless single-stage converters are used for efficient (alternative current) AC-(direct current) DC conversion. These converters control generators, like electromagnetic meso-and micro-scale generators with low voltage. Power factor correction helps increase the factor of the power supply. The main advantage of the power factor is it shapes the input current for increasing the real power of the AC supply. In this paper, a two-switch bridgeless rectifier topology is designed with a power factor correction capability. For the proposed converter topology to have good power quality parameters, the closed loop scheme, which uses the grey wolf optimization (GWO) algorithm, is implemented. The successes of GWO encourage this research to implement GWO in the topology. The performance of the proposed topology is analyzed under different load conditions. Simulation is carried out using the MATLAB/Simulink environment, and the results are compared with those of conventional (proportional integral derivative) PID and (particle swarm optimization) PSO controllers. To validate the simulation results, a 350-W hardware prototype is implemented, and the voltage ripple, efficiency, and power factor under different load conditions are analyzed and tabulated. The comparative study clearly indicates that the proposed converter topology with a closed loop control scheme using the GWO algorithm improves the power factor to 0.9732 and reduces the voltage ripple to 0.12% with a conversion efficiency of 98.25%.

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Section: Literature Surveymentioning

confidence: 99%

Efficient Single-Stage Bridgeless AC to DC Converter Using Grey Wolf Optimization

Kandasamy¹,

Kumar²

2022

Computer Systems Science and Engineering

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“…Conventional PFC using fixed capacitors has the following drawbacks [9]: (1) functioning in manual mode, (2) not fulfilling the reactive power compensation under loads variation, (3) resulting in leading PF and overvoltage, (4) leading to relays mal-operation and transformers saturation after connecting the capacitor banks. Also, automatic power factor correction (APFC) relays are used for the following purposes: (1) maintaining the PF within a range, (2) avoiding leading PF, (3) online recording the current PF, (4) operating in manual/automatic mode, (5) calculating the reactive power compensation, (6) improving the efficiency of transmitted real power, and (7) switching on different sizes of capacitor banks [10].…”

Section: Introductionmentioning

confidence: 99%

“…The latter needs changes in the current waveform's shape, making it follow the voltage. To solve wave distortion problems, there are two options [6] Passive PFC, which improves PF by filtering out harmonics using low‐pass filters for eliminating the higher order harmonics, and it is impractical for high‐power solutions, because of the loss of efficiency, size, and weight of the necessary capacitors and inductors [7], and Active PFC, which uses a switching converter to modulate the distorted wave in order to shape it into a sine wave. The most widely used circuit for this case is a boost converter [7].…”

Section: Introductionmentioning

confidence: 99%

Automatic power factor correction based on Pearson similarity for distribution networks

Mahmoud

2022

The Journal of Engineering

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In this paper, an online algorithm of automatic power factor correction (APFC) for distribution power grids is presented. The algorithm depends on Pearson similarity of voltage and current signals, which can easily be measured locally using voltage and current transformers, respectively. The proposed method not only evaluates the original power factor (PF), but also functions the APFC more quickly. In this work, the compensation index and reactive power compensation can be identified using new mathematical formulas based on the cross-correlation coefficients calculated between the phase voltage and current signals. Moreover, the coefficients are useful for detecting any abnormal condition. The method performance is examined on a large-scale network with real parameters' data, which is simulated using the alternative transient program (ATP) environment, and the proposed algorithm is developed in MATLAB package. Numerous simulation results confirm the APFC relay feasibility, and the unity PF can be achieved. Besides, the proposed algorithm is characterized by its high operating speed, safety and accuracy for PF compensation, where its performance accuracy is greater than 99.7%. The approach offers novel operating/tripping curves based on the correlation coefficients for both power factor correction (PFC) and protection functions. Therefore, it is described with high level of functionality integration, and its security and sensitivity are controllable easily using the correlation settings. 1• Phase displacement, which occurs when a circuit's voltage and current waves are out-of-phase, usually resulting fromThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…Different solutions based on a variety of single-stage systems without DC-link have been proposed: resonant LLC topology [17,18], boost full bridge converter [19], flyback [20,21], SEPIC (single-ended primary-inductor converter) [22], quasi-resonant bridgeless converter [23], matrix converter [24], and dual active bridge [25]. Furthermore, a range of hybrid topologies have been introduced for PFC applications, such as: SEPIC-flyback [26], boost-flyback [27,28], boost-forward [29,30], and forward-flyback [31].…”

Section: Introductionmentioning

confidence: 99%

Modular Battery Charger for Light Electric Vehicles

et al. 2020

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Rapid developments in energy storage and conversion technologies have led to the proliferation of low-and medium-power electric vehicles. Their regular operation typically requires an on-board battery charger that features small dimensions, high efficiency and power quality. This paper analyses an interleaved step-down single-ended primary-inductor converter (SEPIC) operating in the discontinuous conduction mode (DCM) for charging of battery-powered light electric vehicles such as an electric wheelchair. The required characteristics are achieved thanks to favourable arrangement of the inductors in the circuit: the input inductor is used for power factor correction (PFC) without additional elements, while the other inductor is used to provide galvanic isolation and required voltage conversion ratio. A modular interleaved structure of the converter helps to implement low-profile converter design with standard components, distribute the power losses and improve the performance. An optimal number of converter cells was estimated. The converter uses a simple control algorithm for constant current and constant voltage charging modes. To reduce the energy losses, synchronous rectification along with a common regenerative snubber circuit was implemented. The proposed charger concept was verified with a developed 230 VAC to 29.4 VDC experimental prototype that has proved its effectiveness.

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High Voltage Stress in Single-Phase Single-Stage PFC Converters: Analysis and an Alternative Solution

Cited by 25 publications

References 37 publications

Efficient Single-Stage Bridgeless AC to DC Converter Using Grey Wolf Optimization

Efficient Single-Stage Bridgeless AC to DC Converter Using Grey Wolf Optimization

Automatic power factor correction based on Pearson similarity for distribution networks

Modular Battery Charger for Light Electric Vehicles

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