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Щоб переглянути інші типи публікацій з цієї теми, перейдіть за посиланням: Direct Current Auxiliary Power System.

Статті в журналах з теми "Direct Current Auxiliary Power System"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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1

Vladimir, Gurevich. "IMPROVEMENT OF SURVIVABILITY OF A POWER PLANT'S DIRECT CURRENT AUXILIARY POWER SYSTEM UNDER ELECTROMAGNETIC PULSE (HEMP)." International Journal of Engineering Science Technologies 2, no. 1 (2017): 1–8. https://doi.org/10.5281/zenodo.1036601.

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High Altitude Electromagnetic Pulse (HEMP) is a challenging agent aimed to destroy the most critical types of electronic equipment in the most important components of national infrastructure. The article addresses the issue of improvement of a power plant’s direct current auxiliary power systems (DCAPS) survivability under HEMP impact, and suggests certain simple measures and affordable technical means that ensure significant improvement of DCAPS’s resistance to HEMP.

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2

Gurevich, Vladimir. "IMPROVEMENT OF SURVIVABILITY OF A POWER PLANT’S DIRECT CURRENT AUXILIARY POWER SYSTEM UNDER ELECTROMAGNETIC PULSE (HEMP)." International Journal of Engineering Science Technologies 2, no. 1 (2019): 1–8. http://dx.doi.org/10.29121/ijoest.v2.i1.2017.01.

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Анотація:

High Altitude Electromagnetic Pulse (HEMP) is a challenging agent aimed to destroy the most critical types of electronic equipment in the most important components of national infrastructure. The article addresses the issue of improvement of a power plant’s direct current auxiliary power systems (DCAPS) survivability under HEMP impact, and suggests certain simple measures and affordable technical means that ensure significant improvement of DCAPS’s resistance to HEMP.

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3

Zhang, Dawei, Gang Chen, Guo Guo, et al. "Method of Multi-Energy Complementary System Participating in Auxiliary Frequency Regulation of Power Systems." Electronics 13, no. 5 (2024): 906. http://dx.doi.org/10.3390/electronics13050906.

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This research investigates a grid with two areas interconnected by a high-voltage direct-current (DC) link. One of the areas, called the sending-end region, has intermittent renewable generation and frequency stability issues. To address the lack of frequency-regulation (FR) resources in the sending-end region of the interconnected grid, the participation of hydroelectricity–photovoltaics and pumped storage complementary systems (HPPCSs) in auxiliary frequency-regulation (AFR) services is studied in the context of the construction of the electricity market. Firstly, the HPPCS participating in

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4

Nouaiti, A., A. Mesbahi, A. Saad, M. Khafallah, and M. Reddak. "Realization of a Single-Phase Multilevel Inverter for Grid-Connected Photovoltaic System." Engineering, Technology & Applied Science Research 8, no. 5 (2018): 3344–49. http://dx.doi.org/10.48084/etasr.2247.

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This paper introduces the implementation of a single-phase multilevel inverter for a grid-connected photovoltaic system. The considered topology contains a full bridge converter tied to an auxiliary circuit made of two power switches. A proportional integral (PI) current controller is established with this inverter to inject a sinusoidal current into the grid with a power factor near to unity. The studied system is tested on Matlab/Simulink and verified by experiment through a test bench comprising of a fabricated prototype and a DSP TMS320F28379D. The obtained results prove the efficiency of

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5

Nouaiti, Ayoub, MesbahiAbdelouahed, Abdallah Saad, Mohamed Khafallah, and Moussa Reddak. "Realization of a Single-Phase Multilevel Inverter for Grid-Connected Photovoltaic System." Engineering, Technology & Applied Science Research 8, no. 5 (2018): 3344–49. https://doi.org/10.5281/zenodo.1490322.

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Анотація:

This paper introduces the implementation of a singlephase multilevel inverter for a grid-connected photovoltaic system. The considered topology contains a full bridge converter tied to an auxiliary circuit made of two power switches. A proportional integral (PI) current controller is established with this inverter to inject a sinusoidal current into the grid with a power factor near to unity. The studied system is tested on Matlab/Simulink and verified by experiment through a test bench comprising of a fabricated prototype and a DSP TMS320F28379D. The obtained results prove the efficiency of t

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6

Olczykowski, Zbigniew, and Piotr Starula. "Power quality in the circuits of traction substation." Journal of Civil Engineering and Transport 5, no. 4 (2023): 29–52. http://dx.doi.org/10.24136/tren.2023.015.

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Rail transport in Poland uses direct current electric traction to power vehicles (locomotives and multiple units). It is therefore necessary to convert the AC voltage of the power system into the DC voltage of the traction system. The conversion of alternating voltage into direct voltage takes place in traction substations. Rectifier units installed at traction substations are used for this purpose. As a result, electric traction should be classified as non-linear consumers. In addition, the traction substation load changes dynamically. All this makes the electric traction a recipient generati

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7

Oni, Oluwafemi, Andrew Swanson, Rudiren Pillay Carpanen, and Anuoluwapo Aluko. "Implementation of a Multiterminal Line Commutated Converter HVDC Scheme with Auxiliary Controller on South Africa’s 765 kV Corridor." Energies 15, no. 12 (2022): 4356. http://dx.doi.org/10.3390/en15124356.

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The deployment of a 765-kV transmission line on Eskom’s South African Grid marks the beginning of a new era in power industries. The integration of renewable energies by independent power producers (IPPs) leads to an infrastructural change in the stability performance of the entire grid. These developments are expected to bring about a multiterminal direct current (MTDC) system for practical implementation on this grid. Therefore, this study focuses on the dynamic response of the South African transmission grid during a system disturbance. In the carrying out of this study, the South African g

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8

Yin, Yueyang, Ying Huang, Zheren Zhang, Guoteng Wang, Yijing Zhang, and Jianhua Li. "Research on Reactive Power Coordination Control Strategies of Multi-Infeed Line-Commutated Converter–High-Voltage Direct Current Systems." Electronics 12, no. 20 (2023): 4262. http://dx.doi.org/10.3390/electronics12204262.

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For a receiving-end power grid with multi-infeed LCC-HVDC systems, simultaneous commutation failures may seriously threaten the safe and stable operation of the system. To evaluate the impact of commutation failure and improve the voltage stability of the commutation buses in multi-infeed HVDC systems, this paper proposes a method for evaluating the voltage stability of commutation buses and a reactive power coordination control (RPCC) method for commutation failure of multiple HVDC systems. Firstly, three indicators and the entropy weight method are adopted to comprehensively evaluate the vol

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9

Malagueta, Diego C., Lucas de Oliveira Alves, and Elisa Pinto da Rocha. "Techno feasibility analysis of a concentrating solar thermal cooling systems at a university complex." DYNA 88, no. 217 (2021): 282–91. http://dx.doi.org/10.15446/dyna.v88n217.93033.

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Concentrating solar thermal (CST) energy applications are growing worldwide, especially in combined cooling, heat, and power processes. Building upon the analysis of a building’s thermal comfort, and software simulations for CST, the current study evaluates a solar conditioning system integrated with absorption systems. The cooling system is equipped with single-, double- and triple-effect configurations cycle, production parameters, and thermal storage. The required fraction of auxiliary energy for the system operation is estimated. The results indicate that the double effect system is the be

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10

Lukutin, B. V., and D. I. Muravyev. "Matlab/Simulink simulation model of photo-diesel power supply system with intelligent control." Omsk Scientific Bulletin, no. 178 (2021): 52–62. http://dx.doi.org/10.25206/1813-8225-2021-178-52-62.

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In this article, a simulation model of an autonomous PVdiesel power supply (PDPS) system with direct current is considered. The autonomous PDPS is implemented in the Simulink programming environment of the Matlab software package. The system includes: a photovoltaic power station (PPS), a diesel generator (DG), an energy storage system (ESS), a remote consumer as well as auxiliary converters. The PDPS model makes it possible to analyze the energy balance between generation, consumption, and the energy exchange available from the ESS connected via a DC bus (DCB). With the help of the proposed m

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11

Wang, Yuting, Yong Shi, and Kexin Xu. "A New Zero-Voltage Zero-Current Switching Converter with Minimum Duty Cycle Loss." Electronics 13, no. 3 (2024): 518. http://dx.doi.org/10.3390/electronics13030518.

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Zero-voltage zero-current switching (ZVZCS) phase-shifted full-bridge (PSFB) converters have been widely used in high-power applications because of their high efficiency, low price, and easy control. Currently, the biggest problem with PSFB converters in operation is their high duty cycle loss. With the increase in current, duty cycle loss grows and degrades their performance. Focusing on this problem, a new ZVZCS PSFB converter is proposed in this paper. This topology adds an auxiliary circuit to minimize duty cycle loss. Moreover, the lagging-leg switches can obtain zero-current switching (Z

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12

Akash, Thenayamchery, T. A. Arjun, P. R. Harikrishnan, Jose Alphin, and Sheeja Janardhanan Dr. "Regenerative Suspension System." Journal of Automotive Engineering & Technology 5, no. 2 (2020): 11–21. https://doi.org/10.5281/zenodo.4018696.

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Shock absorber is a device used to absorb shocks in an automobile. The energy required to damp these vibrations is wasted in the form of heat. A regenerative shock absorber transfers this vibration into electrical energy while satisfactory performance could be maintained. Here the suspension system is considered to be undergoing free vibrations under road shock and the maximum displacement that it can undergo upon traversing over a pothole or road unevenness has been found. This displacement was found using a developed Matlab code and verified using ANSYS Workbench. A rack and pinion arrangeme

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13

Vaskovskyi, Yu, and M. Poda. "MODELING OF ENERGY CONVERSION PROCESSES IN THE SYSTEM VIBRA-TION ENERGY RECOVERY OF VEHICLES." Tekhnichna Elektrodynamika 2021, no. 4 (2021): 35–43. http://dx.doi.org/10.15407/techned2021.04.035.

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The article presents a complex mathematical model of the energy recovery system for mechanical vibrations of vehicles moving in difficult road conditions. Such a system is an auxiliary power supply system that enhances the functionality of modern vehicles. The mathematical model takes into account the entire set of processes for converting the energy of mechanical vibrations in the following sequence: mechanical energy of the reciprocating oscillatory motion of the vehicle chassis - mechanical energy of the rotational motion of the electric generator shaft - electrical energy of the alternatin

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14

Jiang, Shan, Chunju Fan, and Ning Huang. "Fault location in low-voltage direct current network based on auxiliary injection unit." IET Generation, Transmission & Distribution 13, no. 19 (2019): 4347–54. http://dx.doi.org/10.1049/iet-gtd.2019.0093.

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15

Saadaoui, Khalil, Kaoutar Senhaji Rhazi, Youssef Mejdoub, and Abderraouf Aboudou. "Modelling and simulation for energy management of a hybrid microgrid with droop controller." International Journal of Electrical and Computer Engineering (IJECE) 13, no. 3 (2023): 2440. http://dx.doi.org/10.11591/ijece.v13i3.pp2440-2448.

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<span lang="EN-US">The most efficient and connected alternative for increasing the use of local renewable energy sources is a hybrid microgrid, these systems face additional challenges due to the integration of power electronics, energy storage technologies and traditional power plants. The hybrid <a name="_Hlk120713679"></a>alternating current-direct current (AC-DC) microgrid that is the subject of this research uses a primary-droop control system to regulate state variables and auxiliary services, thus, it is composed of batteries, solar panels and a miniature wind turbine

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16

Andrienko, Danylo, and Serhii Shylo. "Assessment of the feasibility of using semiconductor converters for powering the auxiliary systems of direct current electric trains." Economic Analysis, no. 34(3) (2024): 447–53. https://doi.org/10.35774/econa2024.03.447.

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The study evaluates the feasibility of using static semiconductor converters to replace electromechanical converters in direct current electric trains and suburban trains. Electrified transport, particularly suburban electric trains, is one of the major consumers of energy resources. The analysis identified the limit price of semiconductor converters and the payback period depending on the operational time of the train. It was demonstrated that replacing electromechanical converters with semiconductor ones significantly improves efficiency and reduces electricity consumption from the grid. Thi

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17

de Araujo Silva Júnior, Washington, Andrea Vasconcelos, Ayrlw Carvalho Arcanjo, et al. "Characterization of the Operation of a BESS with a Photovoltaic System as a Regular Source for the Auxiliary Systems of a High-Voltage Substation in Brazil." Energies 16, no. 2 (2023): 1012. http://dx.doi.org/10.3390/en16021012.

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Substation (SS) auxiliary systems (SAux) are facilities responsible for hosting the alternating (AC) and direct current (DC) busbar to serve the equipment and systems that perform the substation’s protection, control, and supervision. External and internal power supplies typically ensure the continuity of such a facility. The electricity support will be restricted to diesel emergency generators (DG) if the external power supply is unavailable due to a contingency. The DG present a slower response time and are susceptible to starting failures. Microgrids with Battery Energy Storage Systems (BES

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18

Istomin, Stanislav Gennadyevich, and Oleg Dmitrievich Yurasov. "Simulation model of heating system of DC electric-multiple units." Transport of the Urals, no. 4 (2020): 75–79. http://dx.doi.org/10.20291/1815-9400-2020-4-75-79.

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Most of the Russian Federation territory is located in the zone of long-term exposure to negative ambient temperatures. In this regard, a significant proportion of power consumption in the suburban traffic on the railways of the Russian Federation accounts for the operation of heating and air conditioning systems. Currently, Russian and foreign scientists are developing energy-saving methods and tools to reduce the power consumption for auxiliary needs of electric-multiple units. In this paper, the authors used the method of constructing simulation models in the MATLAB Simulink program in orde

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19

Chen, Qiubo, Zefu Tan, Boyu Xiang, Le Qin, Zhengyang Zhou, and Shukun Gao. "Active Neutral-Point Voltage Balancing Strategy for Single-Phase Three-Level Converters in On-Board V2G Chargers." World Electric Vehicle Journal 16, no. 7 (2025): 406. https://doi.org/10.3390/wevj16070406.

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Driven by the rapid advancement of Vehicle-to-Grid (V2G) and Grid-to-Vehicle (G2V) technologies, improving power quality and system stability during charging and discharging has become a research focus. To address this, this paper proposes a Model Predictive Control (MPC) strategy for Active Neutral-Point Voltage Balancing (ANPVB) in a single-phase three-level converter used in on-board V2G chargers. Traditional converters rely on passive balancing using redundant vectors, which cannot ensure neutral-point (NP) voltage stability under sudden load changes or frequent power fluctuations. To solv

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20

Shemyakin, A. N., M. Yu Rachkov, N. G. Solov’ev та M. Yu Yakimov. "Radiation Power Control of the Industrial CO₂ Laser Excited by а Nonself-Sustained Glow Discharge by Changing the Frequency of Ionization Pulses". Mekhatronika, Avtomatizatsiya, Upravlenie 21, № 4 (2020): 224–31. http://dx.doi.org/10.17587/mau.21.224-231.

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The article describes radiation power control of industrial CO2 lasers of Lantan series excited by а nonself-sustained glow discharge in the automatic mode. These lasers are closed-cycle fast gas-transport lasers excited by a nonself-sustained glow discharge with ionization by periodic-pulsed capacitively coupled auxiliary discharge. In this case, ionization and conductivity are provided by periodic-pulsed capacitively coupled discharge. The energy contribution to molecular oscillations is provided by the passage of the main discharge current through the plasma with electron density given by i

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21

Deligianni, Panagiota M., George J. Tsekouras, Costas D. Tsirekis, Vassiliki T. Kontargyri, Fotis D. Kanellos, and Panagiotis A. Kontaxis. "Techno-Economic Optimization Analysis of an Autonomous Photovoltaic Power System for a Shoreline Electrode Station of HVDC Link: Case Study of an Electrode Station on the Small Island of Stachtoroi for the Attica–Crete Interconnection." Energies 13, no. 21 (2020): 5550. http://dx.doi.org/10.3390/en13215550.

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A lot of autonomous power systems have been designed and operated with different power levels and with special requirements for climatic conditions, availability, operation/maintenance cost, fuel consumption, environmental impacts, etc. In this paper a novel design of an autonomous power system with photovoltaic panels and electrochemical batteries for a shoreline electrode station is analyzed. This station will be constructed on the small island of Stachtoroi for the new high voltage direct current (HVDC) link of Attica–Crete in Greece. The general guidelines of the International Council on L

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22

Usman, Dani, and Dimas Surya Permana. "Water Pump Control System using Pulse Width Modulation Method Based on Arduino Uno R3." Mekanika: Majalah Ilmiah Mekanika 23, no. 2 (2024): 136. https://doi.org/10.20961/mekanika.v23i2.89449.

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<span lang="EN-US">The availability of sufficient energy must support the rapid development of technology. The availability of electrical energy is decreasing. The saving of energy is one of the ways to solve this problem. One of the uses of electricity in clean water pumps, where clean water is the basic necessity of human life, therefore control system and auxiliary equipment is needed that is able to supply water according to the capacity of the need. However, often the use of the pump is not proportional to the capacity of the needs and the pump is often operated continuously, so tha

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23

Kozak, Maciej, and Jarosław Chmiel. "Cold Ironing Galvanic Corrosion Issues with Regard to a Shore-to-Ship Medium Voltage Connection." Energies 13, no. 20 (2020): 5372. http://dx.doi.org/10.3390/en13205372.

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Cold ironing refers to the usage of less polluting power supply sources to deliver electricity to the moored ship. Such a shore-to-ship system is used when the ship is at a port so the auxiliary combustion engines may be turned off. This paper presents the numerical simulation results of a medium voltage cold-ironing system with regard to the currents flowing between the ship’s hull and grounding busbar. The IT electrical inland system with a neutral grounding resistor, as commonly used in shore-to-ship systems, is investigated. Parasitic capacitances present between the phase-to-hull and phas

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24

Sgroi, Mauro, Gianluca Bollito, Gianfranco Innocenti, Guido Saracco, Stefania Specchia, and Ugo Andrea Icardi. "Study of an Electrochemical Alcohol Concentration Sensor: Optimization of the Anode Structure." Journal of Fuel Cell Science and Technology 4, no. 3 (2006): 345–49. http://dx.doi.org/10.1115/1.2756558.

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Micro power sources have a wide potential market for consumer electronics and portable applications, such as weather stations, medical devices, signal units, APU (auxiliary power units), gas sensors, and security cameras. A micro power source could be the direct methanol fuel cell system (DMFC). An important aspect of this system is the precise control of the concentration of the alcohol-water solution fed to the anode. Different detection principles were taken into consideration: electrochemical, infrared spectroscopy, gas chromatography, refractometry, density measurements, ultraviolet absor

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25

Mazurenko, A., A. Klymchuk, G. Pozdniakova, A. Pustovit, and V. Shavrov. "PROBLEMS OF RELIABLE HEAT SUPPLY PROVIDING IN THE CONDITIONS OF NON-GUARANTEED ELECTRICITY SUPPLY TO HEAT-GENERATING ENTERPRISES." Odes’kyi Politechnichnyi Universytet Pratsi 1, no. 69 (2024): 23–31. http://dx.doi.org/10.15276/opu.1.69.2024.03.

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The paper analyzes the current state of centralized heat supply systems. Considered problems that arise when the power supply is turned off for a longer period of time. For example, due to natural disasters or the destruction of power stations, substations and networks. An analysis of the consequences of long-term shutdowns of centralized heat supply sources in the winter period at extremely low temperatures, which leads to the failure of the main and auxiliary equipment, heat networks and domestic heating systems, was carried out. Considered several real options for reservation or full self-s

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26

Knezevic, Ilija, Martin Calasan, Tatijana Dlabac, Filip Filipovic, and Nebojsa Mitrovic. "Exact Analytical Solutions for Modelling the Speed-Time Characteristics of Direct-Start Induction Machines under Various Operational Conditions on Ships: Review and Experimental Validation." Elektronika ir Elektrotechnika 30, no. 6 (2024): 4–12. https://doi.org/10.5755/j02.eie.38518.

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Induction machines (IMs) are crucial to driving auxiliary machinery and devices of ships, such as pumps, fans, winches, and elevators, which are essential for maintaining the operational functions of a ship and are characterised by various types of loads. This is of critical importance because high surges of starting current can cause instabilities and fluctuations in a ship’s power system, directly affecting the safety and efficiency of ship operations. This paper provides a comprehensive review of analytical expressions for modelling the start-up time of directly started IMs under different

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27

Et. al., Eswaraiah G,. "Analysis and Performance Of Grid Connected Straight Driven Pmsg Based Wind Turbines." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 2 (2021): 1304–12. http://dx.doi.org/10.17762/turcomat.v12i2.1211.

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Permanent-magnet synchronous generator (PMSG) are used widely in wind turbine applications. The performance analysis of PMSG can be enhanced by adopting a number of control mechanisms with the benefit of advanced optimization techniques. Renewable energy is harnessed from continuously replenishing natural processes. Some commonly known are sunlight, water, wind, tides, geothermal heat and various forms of biomass. The focus on renewable energy has over the past few decades intensified greatly. This paper presents modeling and control strategy for the grid connected wind turbine system based on

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28

Sha, Jiangbo, Chunyi Guo, Atiq Rehman, and Chengyong Zhao. "A Quantitative Index to Evaluate the Commutation Failure Probability of LCC-HVDC with a Synchronous Condenser." Applied Sciences 9, no. 5 (2019): 925. http://dx.doi.org/10.3390/app9050925.

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Since thyristor cannot turn off automatically, line commutated converter based high voltage direct current (LCC-HVDC) will inevitably fail to commutate and therefore auxiliary controls or voltage control devices are needed to improve the commutation failure immunity of the LCC-HVDC system. The voltage control device, a synchronous condenser (SC), can effectively suppress the commutation failure of the LCC-HVDC system. However, there is a need for a proper evaluation index that can quantitatively assess the ability of the LCC-HVDC system to resist the occurrence of commutation failures. At pres

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29

Kagdin, V. N., R. A. Maleyev, A. N. Zimin, S. M. Zuyev, and D. R. Yakhutl'. "Starter-generator sets of modern vehicles." Izvestiya MGTU MAMI 15, no. 4 (2021): 27–32. http://dx.doi.org/10.31992/2074-0530-2021-50-4-27-32.

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This article describes the purpose and applications of the starter generator set. The modes of operation of a starter-generator set are considered both as a sequential excitation direct current electric motor, which rotates the shaft of an internal combustion engine, and as a generator, when an electric machine operates as a direct current source of independent excitation, supplying power to electric control circuits, electric motors of auxiliary electrical equipment, lighting and battery charging. Additional functions of a starter-generator set in the form of a start-stop system, regenerative

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30

Razali, Nur Fatin Hanani, and Norsyahidah Mohd Hidzir. "Comparison of the potential risk associated with various SMR designs." IOP Conference Series: Materials Science and Engineering 1326, no. 1 (2025): 012009. https://doi.org/10.1088/1757-899x/1326/1/012009.

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Abstract Each small modular reactor (SMR) design presents a distinct array of risks due to its specialized technology and systems. The probability of safety assessment (PSA) Level 1 is a technique used to evaluate the safety risks of nuclear power plants, focusing on the probability of reactor core damage. Current research mainly emphasizes the advantages and safety features of a particular SMR design. However, there is a deficiency in the available information and data needed for a thorough comparative analysis of the potential risks associated with various SMR designs, particularly in terms

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31

Abdrasulov, E. B., G. S. Ryszhanova, and A. B. Saktaganova. "Judicial practice and its role in the development of the national legislation of the Republic of Kazakhstan." BULLETIN of L.N. Gumilyov Eurasian National University. LAW Series 144, no. 3 (2023): 51–62. http://dx.doi.org/10.32523/2616-6844-2023-144-3-51-62.

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Theoretical and practical significance of the topic of judicial practice is predetermined by the increasing influence of its role in the development and improvement of national legislation. In the system of separation of powers, the judiciary traditionally refrains from creating new legal regulations, ensuring only the application of legal norms in the process of justice. At the same time, the system of separation of powers assumes not only mechanisms of checks and balances, but also methods of interaction of various branches of government. In the process of such work, it is possible and neces

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32

Nikonchuk, I. N. "On the issue of increasing operational energy efficiency of eight-axle passenger DC electric locomotives." VNIIZHT Scientific Journal 79, no. 6 (2021): 373–82. http://dx.doi.org/10.21780/2223-9731-2020-79-6-373-382.

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Mass of a passenger train and, accordingly, number of cars in its composition is selected based on the amount of passenger traffic on the section, determined by the seasonal demand for transportation in each direction. In one direction of the section serviced by an electric locomotive, the mass of a passenger train may differ several times from the opposite direction, which depends on the destination station of the train and the period of its circulation. At present, in addition to 6-axle electric locomotives of the ChS2T and EP2K series, more powerful 8-axle electric locomotives of the ChS7 s

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33

Nevmyvako, Valery P. "Digital economy and Industry 4.0: new challenges for small and medium enterprises." Market economy problems, no. 1 (2021): 96–109. http://dx.doi.org/10.33051/2500-2325-2021-1-96-109.

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Subject/topic. The article is devoted to the study of the issues of universal digitalization as a factor of new challenges for small and medium-sized businesses. The modern socio-economic system of doing business is more and more dynamic and difficult to predict from the standpoint of the effects of society's group behavior generated by it, the volatility of trends in demand for products and services, and the urgent need to personalize the products and services created. Such requests are a direct consequence of the development of the digital economy and the emerging new world order – Industry

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Zhang, Liwei, Lansi Yun, Minghe Sun, and Bo Peng. "Simulation Research on Auxiliary Power Supply System of China Standard EMU." Electronics 8, no. 6 (2019): 647. http://dx.doi.org/10.3390/electronics8060647.

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The auxiliary power supply system is an important part of the China standard EMU (Electric Multiple Units). It is mainly composed of auxiliary converters, chargers, battery packs and several loads. According to the topology of the EMU real auxiliary power supply system, the whole simulation system including the auxiliary converter, charger, single-phase inverter and other single models is built, and the internal working principle and working process of the system are studied. The auxiliary converter adopts the droop control method introducing virtual impedance to reduce the circulation effect

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Wang, Meng Jiao, Hong Juan Hou, and Yong Ping Yang. "Theoretical Study of Solar Energy Aided Auxiliary Steam System." Applied Mechanics and Materials 654 (October 2014): 105–8. http://dx.doi.org/10.4028/www.scientific.net/amm.654.105.

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This paper proposed using solar energy as the auxiliary heat source of coal-fired power plants’ auxiliary steam system based on the current status of the coal-fired power generation and solar energy utilization. Taking a 600MW coal-fired power unit as an example to analysis, it is shown that the thermal performance of the integrated system is improved and the coal consumption rate declines, which radically reduces power plants’ emissions of greenhouse gas and pollutants.

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Gao, Feng, Zhizhong Ke, Zhiwei Luo, and Jie Chen. "Design of a variable frequency direct input power supply system for urban rail applications." Journal of Physics: Conference Series 3033, no. 1 (2025): 012010. https://doi.org/10.1088/1742-6596/3033/1/012010.

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Abstract With the rapid advancement of urban rail transit, research on vehicle equipment has gained critical importance. As a core component of rail transit systems, auxiliary power supplies are evolving toward higher efficiency and power density. To address the complexity and redundancy in powering variable frequency air conditioning units within urban rail auxiliary systems, This study introduces a dual-stage DC/DC converter system with variable-frequency direct input to enhance operational efficiency. The initial stage involves a cascaded configuration combining a three-level Buck converter

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Zhang, Yunfeng, and Hourong Pan. "The Research of High Voltage Auxiliary Power System Neutral Point Grounding Modes between the Nuclear Power Plant and Conventional Fossil Fuel Power Plant." World Construction 4, no. 4 (2015): 15. http://dx.doi.org/10.18686/wcj.v4i4.3.

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<p>Currently, in power plants, the application of the extinction coil in high voltage auxiliary power system neutral point is less experienced. A research done on nuclear power plant and conventional fossil fuel power plant proved that using an auxiliary power system’s different characteristics was leading to different demands of the grounding modes. Thus, this research was done by selecting the grounding mode of high voltage auxiliary power system neutral point on the main nuclear power plants and the partial fossil fuel power plants together with the calculation of practical engineerin

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38

Zhang, Yunfeng, and Hourong Pan. "The Research of High Voltage Auxiliary Power System Neutral Point Grounding Modes between the Nuclear Power Plant and Conventional Fossil Fuel Power Plant." World Construction 4, no. 4 (2015): 15. http://dx.doi.org/10.18686/wc.v4i4.13.

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<p>Currently, in power plants, the application of the extinction coil in high voltage auxiliary power system neutral point is less experienced. A research done on nuclear power plant and conventional fossil fuel power plant proved that using an auxiliary power system’s different characteristics was leading to different demands of the grounding modes. Thus, this research was done by selecting the grounding mode of high voltage auxiliary power system neutral point on the main nuclear power plants and the partial fossil fuel power plants together with the calculation of practical engineerin

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39

Hwu, Kuo-Ing, Zhi-Fan Lin, and Pei-Ching Tseng. "Boost Converter with Main Switch Possessing ZVT and ZCT and Auxiliary Switch Possessing ZCS." Energies 16, no. 14 (2023): 5504. http://dx.doi.org/10.3390/en16145504.

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In this paper, a zero-voltage and zero-current transition (ZVZCT) boost converter is presented with a small number of auxiliary components, such as a resonant capacitor, a resonant inductor and an auxiliary power switch, to produce a main power switch with both zero-voltage switching (ZVS) and zero-current switching (ZCS). Furthermore, the auxiliary power switch also has zero current switching. In addition, a look-up table is employed to implement an auto-tuning technique to regulate the trigger position and turn-on time of the auxiliary power switch, to further improve efficiency, especially

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Nagarajan Krishnamurthy, Et al. "Heavy Vehicles: Distributed Hybrid Power System and Vehicle." International Journal on Recent and Innovation Trends in Computing and Communication 11, no. 1 (2023): 185–88. http://dx.doi.org/10.17762/ijritcc.v11i1.9802.

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This research focuses on the development of a distributed hybrid power system and vehicle for heavy vehicles. The dynamical system comprises a power plant module, a drive module, an energy-storage module, and an entire car controller. The power plant module consists of one or more auxiliary power units that provide power to the heavy vehicle's power system. The drive module includes multiple driver elements responsible for directly driving the heavy vehicle's drive axles or operating individual wheels through direct drive. The energy-storage module serves as an energy reserve. The entire car c

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Zheng, Li Kun, Chang Chen, Dan Mei Xie, and Heng Liang Zhang. "Optimization of the Cold-End System of the 1000MW Ultra-Supercritical Units by VB." Advanced Materials Research 694-697 (May 2013): 778–81. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.778.

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The cold-end system of steam turbine is an important auxiliary system in thermal power plant, its operating mode has a direct impact on the output of the unit and auxiliary power. This paper uses an optimization analysis method to calculate the cold-end system of a 1000MW ultra-supercritical(USC) unit, and establishes a cold-end optimization system by using VB6.0 for a domestic ultra-supercritical unit, which provides an online guide for the operator by calculating the condenser. The results show that this system can provide some guidance for unit operation.

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Bublik, Anton Vladimirovich, Vladimir Vasilyevich Bublik, Nikolay Vasilyevich Esin, and Oleg Vladimirovich Gatelyuk. "Decrease of expanses at selection of technological equipment of inspection bench for auxiliary electrical machines of electric motive power." Transport of the Urals, no. 1 (2022): 35–40. http://dx.doi.org/10.20291/1815-9400-2022-1-35-40.

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On the basis of analysis of direct and alternating current auxiliary machines the authors have considered criteria of selection of technological equipment for an inspection bench. The inspection bench is designed for carrying out acceptance tests of auxiliary electrical machines used in electric motive power by a back-to-back method with the maximum use of its technical feasibility.

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43

Lee, Sang-Hyun, and Choong-Koo Chang. "Separation of Transformers for Class 1E Systems in Nuclear Power Plants." Science and Technology of Nuclear Installations 2017 (2017): 1–11. http://dx.doi.org/10.1155/2017/3976049.

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In order to supply electric power to the safety related loads, safety and reliability of onsite power have to be ensured for the safety function performance in nuclear power plants. Even though the existing electric power system of APR1400 meets the requirements of codes regarding Class 1E system, there is a room for improvement in the design margin against the voltage drop and short circuit current. This paper discusses the amount that the voltage drop and short circuit current occur in the existing electric power system of APR1400. Additionally, this paper studies with regard to the improved

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44

Rolek, Jaroslaw, and Grzegorz Utrata. "A Space-Vector Analysis of the Twelve-Pulse Diode Bridge Rectifier Operation for the Auxiliary Circuit Current Determination Providing the Optimal Line Currents’ THD." Energies 18, no. 1 (2024): 90. https://doi.org/10.3390/en18010090.

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Three-phase diode bridge rectifiers are widely employed in various industrial applications because of their inherent simplicity, robustness, low electromagnetic interference and good overall performance. However, their use causes harmonic distortion in the electric power network line currents due to their nonlinear nature, which, in turn, affects the electric power quality. The fundamental approach to limit the line currents’ total harmonic distortion (THD) introduced by the diode bridge rectification systems is based on increasing the number of steps in their waveform per power supply cycle a

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45

Liu, Ren Li, Yi Zhan, Bin Yan, and Hui Juan Wang. "Remote Monitoring System for Direct Current Power." Applied Mechanics and Materials 313-314 (March 2013): 524–29. http://dx.doi.org/10.4028/www.scientific.net/amm.313-314.524.

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With the purpose of remote centralized monitoring for DC Power, the paper has the scheme of the system of on-line real-time monitoring based on Web, and emphatically introduces the design and development of the monitoring server. The system realizes collecting, storage and real-time display of multiple DC Power, which makes the crews monitor the real-time working condition of DC wherever they could access the Internet. The system has good extensibility and a promising prospect in practical.

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46

Asakura, Kaoru, Toshimitsu Tanaka, and Tadatoshi Babasaki. "Higher-voltage Direct Current Power-feeding System." NTT Technical Review 9, no. 2 (2011): 13–18. http://dx.doi.org/10.53829/ntr201102fa2.

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47

Kumar, Mr Y. Sathish. "Advanced Monitoring for Auxiliary Transformer Failures and Alerting System." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 03 (2024): 1–5. http://dx.doi.org/10.55041/ijsrem29600.

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Auxiliary transformers are critical components in power distribution systems, and their failure can lead to costly downtime and potential damage to electrical infrastructure. This paper proposes the development of a real-time alert system will be designed to monitor auxiliary transformer health and promptly detect anomalies and failures. The development of a transformer health monitoring system involves the utilization of Arduino-based embedded systems to interface with temperature, ultrasonic, and current sensors. The system aims to monitor essential parameters such as temperature, oil level,

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Fang, Nian, Xian Shan Li, Hao Xu, and Yu Long Du. "Relay Protection Setting Calculation and Analysis of Auxiliary Power System for Hydropower Plants." Applied Mechanics and Materials 574 (July 2014): 324–28. http://dx.doi.org/10.4028/www.scientific.net/amm.574.324.

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The configuration and setting calculation of auxiliary power protection are directly related to the regular and safe operation of the equipments, thereby affecting the security and stability of the power plant. The system features are analyzed in depth according to the operational requirements of auxiliary power system protection in Xiangjiaba hydropower plant ,the system model is built on the basis of the actual project, and a variety of short-circuit current calculations are carried out. At last, the setting of the auxiliary power system relay protection is completed. This thesis also propos

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Yuhimenko, Vladimir, Dmitry Baimel, Moshe Sitbon, Moshe Averbukh, Simon Lineykin, and Alon Kuperman. "Hybrid Internal Combustion Engine Based Auxiliary Power Unit." Micromachines 11, no. 4 (2020): 438. http://dx.doi.org/10.3390/mi11040438.

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The brief presents some principles of the ON/OFF operational strategy applied to energy management of a hybrid internal combustion engine (ICE) based auxiliary power unit (APU). It is shown that significant reduction of fuel consumption (78% for the example system presented) and maintenance expenses (80% operation time decrease was attained by the system) may be achieved by such a strategy, shifting the system operation point towards corresponding optimal region. The side effect of aggravated amount of starting events is cured by employing an actively balanced supercapacitor (SC)-based emergen

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Yang, Hongda, Shiyu Chen, Minhu Xu, Heqian Liu, Peng Zhang, and Zhongyuan Li. "Study on the direct current properties of ultraviolet crosslinked epdm rubber." Journal of Physics: Conference Series 2683, no. 1 (2024): 012045. http://dx.doi.org/10.1088/1742-6596/2683/1/012045.

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Abstract Ethylene propylene diene monomer (EPDM) is widely used as an insulation material in power equipment due to its excellent insulation performance. This article studies the method of preparing EPDM rubber composites by UV cross-linking. It analyzes three traditional functional auxiliary cross-linking agents, namely allyl isocyanurate (TAIC), trimethylolpropane trimethyl Effects of methyl acrylate (TMPTMA), and N, N′-m-phenylene bismaleimide (N, N′) on the DC properties of EPDM rubber. Experimental results show that all three auxiliary cross-linking agents can effectively improve the DC c

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