Mode Power Supply Research Articles

Research on mobile energy storage scheduling strategy for emergency power supply protection of post-disaster isolated loads

Aiming at the problem of insufficient power supply capacity of isolated loads in oceanic islands, a concept based on mobile energy storage and power conservation is proposed in this paper. Firstly, the energy flow and traffic flow characteristics of mobile energy storage are quantitatively analyzed, and an accurate mathematical model is established. Furthermore, the time-space distribution characteristics of load are carefully considered, and the Voronoi diagram and Tyson polygon method are introduced to determine cell differentiation. On this basis, combined with the power demand of load nodes and the energy storage characteristics of mobile energy storage vehicles, the evaluation indicators of cell energy and relative surplus energy of cells are designed, and the agent-cellular automata algorithm is used to schedule the mobile energy storage. The simulation results show that the power supply mode based on mobile energy storage can effectively improve the reliability of isolated loads. This paper provides a new perspective for solving the reliable power supply problem of isolated loads.

Multiphase soft metal enabled high-performance fabric-based wearable energy harvesting

Highly efficient and flexible power sources have always been the focus and goal in the field of wearable electronics. However, the existing wearable power sources are limited by their large size, high weight, electrolyte leakage, and poor mechanical compliance, which seriously hinders their practical applications. Herein, we propose a novel strategy to achieve and demonstrate a fabric-based high-performance wearable triboelectric nanogenerator (TENG) structure. The metals of gallium (Ga), bismuth (Bi), indium (In), and tin (Sn) are mixed according to specific mass ratios, and then they are transformed in liquid phase to form room-temperature multiphase soft metals of GaBiInSn. The material exhibits both metallic and fluidic properties, and possesses a characteristic of multiphase structure. The GaBiInSn material is directly deposited between polytetrafluoroethylene (PTFE) layers and nonwoven fabrics to establish multi-level conductive and frictional interfaces, creating charge transfer and solid-liquid hybrid dielectric layers. Therefore, the thin film-type triboelectric nanogenerators with a structure of PTFE/GaBiInSn/nonwoven fabric (LM-P-TENGs) is manufactured. The LM-P-TENGs can be integrated onto fabrics without compromising their breathability, comfortableness, and flexibility. Particularly, LM-P-TENGs efficiently convert the mechanical energy of human limb movements into sustainable electrical energy output. Under the human limb mechanical triggering conditions, LM-P-TENG achieves a champion specific open-circuit voltage up to 900 V, peak short-circuit current density of 43.3 mA/m2, and high power density of 12.56 W/m2. This work demonstrates the application potential of room-temperature multiphase soft materials in flexible wearable power sources, while introducing a novel power supply mode for wearable electronics. Additionally, the LM-P-TENGs also present applications in self-powered wearables, medical biosensing systems, human-machine interaction systems, near-eye display systems, etc. for the flexible electronics.

Design and Development of Miniature Measuring Instrument for Parachute Cords Dynamic Load for Stepless Parachute Opening.

Spacecraft recovery technology is crucial in the field of aerospace, in which the parachute plays a key role in slowing down the descent speed of the spacecraft and realizing a smooth landing. In order to construct a dynamically adjustable parachute deployment strategy, it is necessary to measure the parachute dynamic load accurately in real-time. However, the existing sensor measurement scheme makes it difficult to meet the measurement requirements due to its large structure and complex wiring. In order to meet the current demand for real-time measurement of parachute cords dynamic load, a miniature measuring instrument is designed. According to the function and technical requirements of the miniature measuring instrument, the hardware modules of the acquisition system are selected and designed, and the integration debugging and performance optimization of the microcontroller module, A/D sampling module, signal acquisition circuit, and power supply module are carried out. The software of the parachute cords tension acquisition system based on the miniature measuring instrument is developed. The Load Cell is modeled by using SolidWorks 2022 and statically analyzed by using Ansys 2022 R1 Workbench finite element analysis software. Then the final structure of the Load Cell and the pasting position of the strain gauge are determined through the results analysis as well as experimental verification. The hardware module of the signal acquisition system for the miniature measuring instrument is then encapsulated. The force value of the miniature measuring instrument is calibrated and tested many times by using the microcomputer-controlled electronic universal testing machine. The experimental results show that the designed miniature measuring instrument has accurate data, strong stability, and good real-time performance, which meets the demand for real-time accurate measurement of miniature measuring instruments, and can provide reliable data for parachute cords parameter validation and stepless unfolding design.

Fault Location of AT Traction Network Adopting Bilateral Power Supply Mode Based on Generalized Symmetrical Components Method

Fault Location of AT Traction Network Adopting Bilateral Power Supply Mode Based on Generalized Symmetrical Components Method

Design of Microcontroller Based Power Supply Unit with Multiple Input and Output

This innovative project showcases a versatile power supply module, capable of delivering both AC and DC outputs, regardless of the input power source. This user-friendly device offers multiple output options from a single unit, catering to diverse power requirements. At its core, a microcontroller (8051) expertly manages the switch and relay configuration, ensuring seamless operation. Through rigorous simulation (Matlab/Simulink) and practical testing (prototype device), our results demonstrate the module's effectiveness in providing a reliable, multi-output power supply solution, enhancing convenience and efficiency.

Highly stable and efficient Sb doped Ti/RuO2-IrO2-SnO2 electrode toward organic pollutants degradation by in situ generated oxidizing species

Electrochemical oxidation (ECO) technology has proven to be efficient for organic wastewater treatment. Given the strong demand for the development of anodes with superior stability, high activity, and low cost that can be applied industrially, herein, a stable Sb-doped Ti/RuO2-IrO2-SnO2 electrode (SSE) is fabricated and served as an anode for the degradation of aniline using diverse power supply modes. The SSE shows better performance than the Ti/RuO2-IrO2-SnO2 electrode (SE) in facilitating electron transport, enlarging the electrochemical active surface area, enhancing stability, and increasing electrocatalytic activity. Theoretical calculations reveal the stability and electronic properties of the synthesized electrodes. Furthermore, by degrading complex molecules and real wastewater, the practical industrial application of SSE is explored. Subsequently, the active species and possible degradation pathways are systematically elucidated. Therefore, this work provides a promising and superior-performance electrode with attractive application prospects for the high-efficient degradation of refractory organic wastewater.

Electric-Thermal Analysis of Power Supply Module in Graphitization Furnace

Graphite, a key anode material in lithium-ion batteries, primarily relies on the Acheson graphitization furnace (AGF) for production. This research focuses on the power supply module of the AGF, particularly the electrodes and their power transmission clamps. A three-dimensional transient electric-thermal-fluid coupling model was developed to numerically analyze the temperature and electric field distributions during operation. The study revealed that heat conduction through furnace electrodes dominates temperature rise. Notably, clamping plates within transmission clamps exhibit high temperatures and gradients, posing a thermal failure risk. Efficient cooling plate design with liquid-cooled channels is crucial for temperature control. Additionally, maintaining high electrode temperatures reduces resistivity, lowering power consumption in the power supply module. This study provides insights into optimizing AGF power supply module design, emphasizing the importance of effective cooling strategies for clamping plates and the benefits of maintaining elevated electrode temperatures for energy efficiency.

SIMPLE ELECTROSPINNING ASSEMBLY FOR THE PREPARATION OF POLYVINYL ALCOHOL NANOFIBERS CONTAINING PIPER BETLE (L)

Objective: The aim of this research was to assemble an electrospinning device with some components from used medical devices in hospital, so that it could be utilized to produce nanofibers containing Piper betle (L). Methods: The electrospinning was assembled with the main components were the 20 kV high voltage (hV) power supply (module), the Terumo TE-331 syringe pump and the collector. The resulting device was then evaluated for tool performance. The device was used to produce Polyvinyl Alcohol (PVA)-based nanofibers with Piper betle (L) as the active ingredient. The nanofibers produced were then tested for antibacterial activity, morphology by Scanning Electron Microscope (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). Results: The polymer solution was pushed by a syringe pump with a flow rate of 15 ml/h into the spinneret. In this electrospinning process, the formed nanofibers appear visually as a thin layer on the collector. With variation in PVA concentration and the same concentration of Piper betle l. as the active ingredient, the results showed that the nanofiber carrier did not affect the efficacy provided by Piper betle (L). The characterization with SEM revealed that the assembled tool was able to make nanofiber preparations that have fine continuous/fairly regular fibers with an average diameter of 46.479±2.406 nm. Meanwhile, the analysis using FTIR showed the presence of OH stretching groups of phenolic compounds from Piper betle (L). Conclusion: It can be concluded that the electrospinning was successfully assembled from unused medical devices in hospital and proven to produce nanofibers.

The Design and Implementation of Blockchain Smart Contract in Hybrid Energy Storage Management of Photovoltaic System

As the main power supply mode of new energy, photovoltaic system has the characteristics of wide distribution and scattered energy collection Traditional management methods cannot realize the effective processing of distributed energy storage. Therefore, finding an effective intelligent method is the focus of current research, and the design of blockchain smart contracts can theoretically realize the centralized processing of photovoltaic energy storage systems. In this paper, the blockchain smart contract system is taken as the research object, and the energy storage management of the photovoltaic system is quantified through mapping, so as to realize the massive quantitative processing of data. Then, the reduction function is used to differentially reduce the distributed functional energy storage system, complete the centralized management of energy storage, and simplify the unnecessary data. Finally, combined with the hybrid energy storage situation, the key indicators in the data are mined, and the completion rate of the contract and the stability analysis of energy storage management are calculated. The results show that blockchain can mine the characteristics of hybrid energy storage, reduce the impact of distributed features on energy storage, improve the energy storage efficiency by 20%, and make the energy storage stability reach more than 90%. At the same time, the completion rate of smart energy storage contracts can be enhanced, the fitting degree can reach 90%, and the grid connection with the thermal grid can be effectively connected, the utilization rate of distributed energy resources will reach 85%, and the cost saving rate will be increased by 10%. Therefore, blockchain can solve the problem of hybrid energy storage in integrated systems, improve the completion rate of smart contracts, and promote the development of new energy.

Study on green power supply modes for heavy load in remote areas

In this study, the present situation and characteristics of power supply in remote areas are summarized. By studying the cases of power supply projects in remote areas, the experience is analyzed and described, and the applicability of related technologies, such as grid-forming storage and power load management, is studied, including grid-connection technologies, such as grid-forming converters and power load management. On this basis, three power-supply modes were proposed. The application scenarios and advantages of the three modes were compared and analyzed. Based on the local development situation, the temporal sequences of the three schemes are described, and a case study was conducted. The study of the heavy-load power supply mode in remote areas contributes to solving the problem of heavy-load green power consumption in remote areas and promoting the further development of renewable energy.

Research on driving technology of radio‐over‐fiber (ROF) compact optical transmitter module

AbstractIn response to the problems of communication capacity and spectrum resource constraints, radio over fiber (ROF) technology has gained widespread adoption, and the quality and performance of the optical transmitter module also directly affect the transmission of the link. This paper presents the design of a direct modulation optical transmitter module in the frequency band ranging from 2.6 kHz to 206.8 MHz using OPA690 broadband voltage feedback op‐amp. The module features a tunable bias voltage range from 0 to 5 V to accommodate different threshold voltages for modulation power supply. It offers a gain of 12 dB and a signal‐to‐noise ratio exceeding 50 dB while demonstrating excellent stability, high signal purity, good spectral response characteristics, and compact size advantages. Based on this design, we further optimized the system circuit by adding a fourth‐order Butterworth filter structure, reducing the lower cut‐off frequency to about 500 Hz, increasing the gain by 6 dB, reducing the return loss to −26.91 dB, and the module's signal‐to‐noise ratio exceeding 90 dB. This optimization scheme improves the stability and signal purity of the optical transmitter module and improves the spectral response characteristics. In this paper, Multisim is used to analyze and verify the proposed optical transmitter circuit. In addition, a complete link experiment was carried out using an optical receiving module designed in the same laboratory to verify the feasibility of our proposed module.

The calculation of rail potential considering stray current

Abstract Taking the railway network of a certain region as an example, this paper introduces the traction law of the metro in urban rail transit and the common power supply mode between traction stations. The finite element modelling of vehicle operating conditions was carried out using simulation software to analyze the interference law of stray currents of city rail on soil potential and rail potential at different times under unilateral and bilateral power supply modes. The results show that the influence of different working conditions is different, and the two-sided power supply mode can restrain the influence of stray current compared with the single-sided power supply mode.

A parameter design method of LC filter circuit for closed‐loop dynamic power supply system based on linear power amplifier

AbstractThe linear power amplifier (LPA) suffers from low power supply utilization in the DC power supply mode, leading to reduced output efficiency. This paper constructs an efficient power supply mode based on closed‐loop dynamic power supply system (CLDPSs). The CLDPSs can generate a pair of bipolar dynamic power supplies based on a predetermined signal to provide power to LPA, which can maintain a small voltage drop between the power supply and the output of LPA, thereby improving the power supply utilization of LPA. In addition, the study also focuses on the conflicting relationship between the output ripple and the dynamic performance of the CLDPSs, for which a new parametric design of the LC filter circuit is proposed, aiming to achieve a balance between these two aspects. Finally, a voice coil motor driving platform is constructed for experimental testing. The results demonstrate that the output ripple and dynamic performance of the CLDPSs can be balanced. In comparison to the DC power supply mode, the CLDPSs power supply mode can enhance the efficiency of LPA by 2 times while the driving accuracy of voice coil motor is basically unchanged.

Studies of the influence of the degradation of the capacitances of an inductively coupled oscillator circuit on the characteristics of the wireless power supply module of an implantable spinal cord stimulator

Studies of the influence of the degradation of the capacitances of an inductively coupled oscillator circuit on the characteristics of the wireless power supply module of an implantable spinal cord stimulator

Array strategy enhances low-frequency radiation intensity and low-frequency magnetic field sensing SNR of magnetoelectric antenna

The magnetoelectric (ME) coupling effect is a more effective approach for reducing antenna size. Nevertheless, at low frequencies, a single ME structure generates a weak signal strength and a low signal-to-noise ratio (SNR). This study utilized an array strategy to improve the radiation and induced electromagnetic field performance of ME antennas. In this study, the array ME coupling structure, composed of Metglas and Pb (Zr1−xTix) O3 (PZT) bilayers, was operated through ME coupling resonance modes. The relationship between the sensitivity and SNR of the serially connected ME antenna array and the number of series connections was determined. On the transmission side, the impact of the multi-source power supply modes on the radiation intensity and directivity of the ME antennas was analyzed. The sensitivity, SNR, magnetic detection limit, directivity, and radiation range of the single ME and array ME antennas were tested for the key parameters. Finally, it was demonstrated that at a frequency of 31.75 kHz, the array strategy achieved a low-frequency signal transmission distance of up to 48.1 m, which is 1.7 times that of a single ME antenna. This array strategy significantly enhances the radiation intensity and magnetic field SNR of ME antennas in the low-frequency range, demonstrating its application prospects in the field of low-frequency communication.

Start-up and Transient Support Control of AC-DC Hybrid Distribution Networks with Distributed PV Access

Abstract For AC-DC hybrid distribution networks, a large number of interconnecting converters connected to DC micro-sources and DC distribution networks in the distribution network provide a powerful aid for restoring power supply to the loads in the lost area after an accident by using the local power supply of the system, and at the same time, the power synchronisation control strategy provides a friendly power supply mode for the power supply of the interconnecting converters to the passive network. This paper analyses the start-up control of AC-DC hybrid distribution networks with distributed photovoltaic (PV) access under the scenario of interconnecting converter multi-machine co-operation in transferring power to a load area without a superordinate power supply; and puts forward a power synchronous control of interconnecting converter multi-machine co-operation to suppress power-frequency oscillation under faults of a distribution network without a superordinate power supply.

Research on load-resistant enhancement control optimization of composite energy power supply system based on deep reinforcement learning

Abstract To solve the problem of insufficient inertia in the power electronics components under the development trend of power electronics in the transmission system of heavy-duty electric vehicles, combined with the composite energy power supply mode and control method, voltage-based feedback channels and virtual capacitor branches are designed for both engine-generator sets and DCDC control loops. These innovations compensate for system inertia and introduce a TD3 deep reinforcement learning-based adaptive regulation component to manage electrical systems in response to DC voltage fluctuations. This approach enhances the stability of the entire system in the face of load disturbances. Strategy validations demonstrate that this method ensures stable system operation, significantly mitigates DC voltage fluctuations during sudden load changes and is highly adaptable without relying on system models.

Разработка датчика для анализа процессов взаимодействия заряженных частиц и контроля содержания радиоактивных элементов

Of great interest are the processes associated with the results of interaction of charged particles accelerated to energies of several giga-electron volts; they can be applied in the most modern science and technology. To obtain maximum information about the interaction of charged particles in accelerators, special radiation sensors are required that operate in the corresponding sections of the spectrum, both simple ones, such as cathode and photo luminescent detectors, and complex highly sensitive vacuum equipment that not only records even very weak radiation, but also significantly amplifies it. In this work, an automated calculation of the electron-optical and amplifying system of the device will be carried out, a photocathode will be selected, a design of the vacuum block of the sensor will be proposed, and its electric power supply modes will be indicated. Materials and methods. Theoretical analysis based on the studied specialized literature and practical work experience. Development of high-tech products using the automated design system. Optimization and system analysis. Results. An automated calculation of the electron-optical and amplifying system of a photomultiplier-type device with micro-channel amplification was performed, a photocathode was selected, and conditions for minimizing noise during radiation monitoring were provided. Based on the calculations performed, a design of the vacuum block of the sensor was proposed, its electrical power supply modes were specified, and technological issues were considered. Discussion. The modes of operation of the radiation sensor were identified, providing conditions for minimizing noise in operation, concerning the energy of photoelectrons approaching the secondary electron multipliers, the configuration of the signal beam. The design of the radiation sensor of the PMT type was developed, providing the required high levels of the main parameters: sensitivity threshold, signal gain coefficient, photoelectron collection coefficient, anode dark current, and response speed. Conclusion. A critical analysis of approaches to the study of the interaction process of charged particles and experimental means was carried out. The design of a highly efficient radiation sensor was developed, its optimization was carried out in terms of increasing the efficiency of interaction of photoelectrons with the amplification system. An assembly drawing of the vacuum block design was developed, the most important technological issues of its manufacture were resolved. Resume. The results of the work can be useful in setting up experiments to study the processes of interaction of particles accelerated to energies of several giga-electron volts, as well as in the development of devices using ultraviolet radiation, including medical ones.

Design of Intelligent Street Lamp System Driven by New Energy Sources

The streets, large and small, are full of street lights, which light up the way home when night falls. But tens of thousands of street lamps consume a lot of energy. The non-renewable energy on the earth is limited, so in order to protect our earth and enable the sustainable development of the earth, this paper designs and develops an intelligent street lamp system driven by new energy sources. Different from the traditional single power supply mode, the street lamp mentioned in this paper uses solar energy, wind energy and ceramic piezoelectric machinery to provide electricity to the street lamp. Solar power is generated when the sun is full, and wind power is generated when there is no sun. The mechanical energy of a car passing through piezoelectric ceramics can also be used to generate electricity in special weather conditions when there is no wind or sunshine. A variety of power generation methods have solved the malpractice of new energy source street lamps relying on weather conditions. And the system can display the power of the storage battery in real time, and light it automatically when night falls. It is an efficient multi-source drive intelligent new energy street lamp.

Automatic Zebra Crossing Using Raspberry PI

The Automatic Zebra Crossing project enhances pedestrian safety and convenience at zebra crossings using an Atmega8 microcontroller board, a time display, and Progisp software. The project features a pair of automatic gates positioned at both ends of the zebra crossing, closing whenever the traffic signal turns red to stop vehicles. This closure effectively restricts pedestrian movement beyond the zebra crossing area, ensuring enhanced safety. The system works like an automatic stairway, with the gates being opened or closed depending on the condition of the traffic signal. As the central control device, the Atmega8 microcontroller board processes inputs from the traffic signal and generates control signals to open and close the gates. The time display tells pedestrians how much time is left until they can cross in real time. The Atmega8 microcontroller is programmed using the Progisp software, allowing the construction of the control logic and synchronization with the traffic signal. The software enables the microcontroller to work seamlessly with the gate motors and the time display. The Automatic Zebra Crossing system dramatically improves pedestrian safety by keeping people inside the crossing area when the light is red. This system uses gates for straying, lowering accident rates, and optimizing traffic flow. The project documentation outlines the software implementation with Progisp and explains the hardware setup. This setup involves an Atmega8 microcontroller board, gate motors, and a time display. The code integrates a control logic for synchronization.Hardware Requirement:  Raspberry Pi- Pico  Mobile Wi-fi Module  Power Supply Unit  Motor Unit  Relay Unit  Software Requirement:  Python  PC  Web page