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Last Updated: 10 January 2023

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AC-DC UPF charging circuit for two-wheeler electric vehicle application

The field of energy investigated took a radical turn towards non-conventional natural sources with zero pollution capability, leading to extinction and the release of greenhouse gases from fossil fuels. In this new era of global warming, electric cars are on the rise. When charging the battery of EVs, this paper discusses the power factor. When charging the battery of the EV from AC-DC conversion, the paper focuses on retaining the unity power factor on the source side.

Source link: https://doi.org/10.11591/ijpeds.v14.i1.pp11-24


Inter-connected AC/DC HMGS power management with 3-phase and 1-phase ILC

The results of the In the AC/DC hybrid micro grid system power converters are always tested for accuracy in distribution, their ability to ensure accurate power sharing, transient stability, and load dynamics are all investigated. This paper suggests a decentralized droop control scheme for interlinking converters connected to interconnected AC and DC grids. The power sharing through the ILC is dependent on the AC frequency droop and DC voltage droop, which occur due to overloading. The obtained results are compared to a double loop control scheme that displays less frequency deviations and accurate power sharing.

Source link: https://doi.org/10.11591/ijpeds.v14.i1.pp311-319


Alignment Properties of Liquid Crystal Molecules under AC and DC Voltage Application Studied by Surface Plasmon Resonance and Optical Waveguide Spectroscopy

When AC and/or DC voltages are applied, we report the analysis of liquid crystal molecules near the surface of SiO 2 alignment layers and in the whole cell. From the SPR/OWS angular scan results, the tilt angle from the surface to inside the cell was obtained. In addition, the effects of space-charge polarization on the LC alignment characteristics was shown by the SPR kinetic properties.

Source link: https://doi.org/10.1143/jjap.49.04dk22


Three Port Isolated AC/DC Converter with Power Factor Correction

This paper introduces a converter with three ports with isolated output, higher output torque, and voltage standards. The converter has two input ports for connecting an AC source and the solar PV source. Background: To implement the new novel converter and investigate the switching activities Objective: A two-stage conversion is required for providing isolated DC output Methods: Verification of control scheme in simulation with hardware validation Results: The converter's intended operation is obtained.

Source link: https://doi.org/10.2174/2352096515666220513103845


Multiport AC-AC-DC Converter for SNOP With One Medium-Frequency Transformer

The conventional AC distribution network is impossible to flexibly adjust the line voltage and power flow with the availability of increasing renewable energy sources. The new BTB CHB converters are based on the back-to-back cascaded H-bridge converter system, and it replaces the multiple DC-DC converters in the current BTB CHB converters. In addition, the voltages at several AC and DC ports of a proposed multiport AC-DC converter are completely decoupled, and the various AC and DC settings can be adjusted independently, and multiple AC and DC ports can be adjusted independently.

Source link: https://doi.org/10.24295/cpsstpea.2022.00034


Coordination Control of a Hybrid AC/DC Smart Microgrid with Online Fault Detection, Diagnostics, and Localization Using Artificial Neural Networks

A solar and wind renewable energies-based hybrid AC/DC microgrid is recommended in this paper for minimizing the number of DC/AC/DC power conversion steps. MG instability is exacerbated by the high penetration rates of renewable energy, which is causing a lot of instability. By virtue of its high gain at the resonant frequency, thereby reducing harmonics, the PR controller plays a role as a digital filter with infinite impulse response characteristics. mso power electronic converters may experience excess current in short circuit failures as a result of the use of convert-connected DG units in MGs. Fault detection is vital for MG control and operation because it allows the device to quickly identify and recover from faults. Due to its accuracy, robustness, and quickness, this paper developed an intelligent online fault detection, diagnosis, and localization information for hybrid low voltage AC/DC MGs using an artificial neural network.

Source link: https://doi.org/10.3390/electronics12010187


Reinforcing Data Integrity in Renewable Hybrid AC-DC Microgrids from Social-Economic Perspectives

The impact of the data integrity hack on MGs' steady-state operation of hybrid MGs has been discussed in this paper as one of the most advanced cyber threats to MGs. A new method based on sequential hypothesis testing is also designed to find DIA on the renewable energy sources u2019 metering network and increase the data integrity within the HMGs. Also, to assess the effect of DIA on the operation of the HMGs, DIAs of various severities have been launched on the measured power generation of renewable energy resources like wind turbines.

Source link: https://doi.org/10.1145/3512891


Analyzing Cascading Failures in Power Grids under the AC and DC Power Flow Models

We investigate cascading failures in power grids under nonlinear AC and linearized DC power flow models in this paper. We numerically compare cascade evolution after single line failures in four test networks using the two flow models.

Source link: https://doi.org/10.1145/3199524.3199559


Voltage Stability Assessment of AC/DC Hybrid Microgrid

Due to the proliferation of renewable energy sources, such as photovoltaic generation, battery energy storage systems, and wind turbines, hybrid microgrids are becoming increasingly popular. When several forms of power generators and loads coexist at the power distribution level, the coordination of AC sub-microgrids and DC sub-microgrids enhances operational effectiveness. However, the voltage stability analysis and software validation of AC/DC hybrid microgrids is a critical issue, particularly with the increasing use of power electronic devices and various forms of power generation. To minimize the simulation runtime with acceptable errors, we suggest a rapid simulation method.

Source link: https://doi.org/10.3390/en16010399


Design, Construction and Evaluation of 5A AC-DC Portable Lead Acid Battery Charger with an Inbuilt Automatic Shut OFF

Battery chargers are a battery charger that recharges battery after being discharged. When left for a few hours, it is well known that battery can be destroyed if discharged below its manufacturer's set discharge voltage limit. A single switch fly back buck converter that allows battery charging from the alternating current supply is engineered and built. An automatic charge controller was included to the design to help the battery from overcharging. When the charger is connected to the mains supply, it is ON, while the green light emitting diode is ON, while charging is cut OFF or completed, the charger is ON.

Source link: https://doi.org/10.57233/ijsgs.v6i2.116

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions