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Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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1

Aamir, Muhammad, Kafeel Ahmed Kalwar, and Saad Mekhilef. "Review: Uninterruptible Power Supply (UPS) system." Renewable and Sustainable Energy Reviews 58 (May 2016): 1395–410. http://dx.doi.org/10.1016/j.rser.2015.12.335.

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2

Murad, S. A. Z., M. N. Md Isa, and N. A. Rahman. "Monitoring System for Uninterruptible Power Supply." American Journal of Applied Sciences 4, no. 3 (March 1, 2007): 181–83. http://dx.doi.org/10.3844/ajassp.2007.181.183.

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3

Dai, Xue Mei, and Yu Fu. "Suggestions in Ensuring the Safety of UPS Power Supply." Advanced Materials Research 461 (February 2012): 772–74. http://dx.doi.org/10.4028/www.scientific.net/amr.461.772.

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Анотація:

UPS (Uninterruptible Power System) is an energy storage device, and it is also a uninterruptible power supply which contains the inverter as the main component and works at the constant voltage constant frequency. it is playing an increasingly important role. Some suggestions are mainly proposed to ensure the safety of UPS power supply system in this paper, which make the UPS power supply system really play the role of escort in the practical application.

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4

Ashrafi, Bahram, and Mehdi Niroomand. "Novel Reduced Parts Online Uninterruptible Power Supply." Advances in Power Electronics 2012 (November 25, 2012): 1–8. http://dx.doi.org/10.1155/2012/502763.

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This paper presents design consideration and performance analysis of novel reduced parts online three-phase uninterruptible power supply (UPS) system. The proposed UPS system is based on reduced switch count dual bridge matrix converter. It employs only six power switches and results in reducing the cost of the system compared to conventional online UPS topologies, while achieving excellent performance. The performance of the proposed system is evaluated through simulation in terms of input/output waveforms quality and shows the viability of topology.

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5

Казакова, A. Kazakova, Тарасова, L. Tarasova, Бандурко, R. Bandurko, Антоник, and I. Antonik. "SYSTEM REMOTE MONITORING OF UNINTERRUPTIBLE POWER SUPPLIES." Alternative energy sources in the transport-technological complex: problems and prospects of rational use of 2, no. 2 (December 17, 2015): 878–81. http://dx.doi.org/10.12737/19586.

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Анотація:

This article has developed a system of remote monitoring of the uninterruptible power supply in real time, based on a review of existing monitoring systems have been developed and submitted to the structural and functional scheme of the system and a description of their work

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6

Bandurko, Roman, and Nuri Narakidze. "Control system parameters of the uninterruptible power supply." Актуальные направления научных исследований XXI века: теория и практика 3, no. 7 (December 10, 2015): 123–26. http://dx.doi.org/10.12737/14817.

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7

NASIRI, A., A. E. AMAC, and A. EMADI. "Series-Parallel Active Filter/Uninterruptible Power Supply System." Electric Power Components and Systems 32, no. 11 (November 2004): 1151–63. http://dx.doi.org/10.1080/15325000490441507.

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8

Guerrero, Josep M., Luis Garcia De Vicuna, and Javier Uceda. "Uninterruptible power supply systems provide protection." IEEE Industrial Electronics Magazine 1, no. 1 (2007): 28–38. http://dx.doi.org/10.1109/mie.2007.357184.

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9

Masri, M., M. Irwanto, H. Alam, A. H. Haziah, and A. H. Butar-Butar. "OPTIMUM SIZING OF PHOTOVOLTAIC POWERED UNINTERRUPTIBLE POWER SUPPLY SYSTEM." Far East Journal of Electronics and Communications 17, no. 5 (October 23, 2017): 1111–17. http://dx.doi.org/10.17654/ec017051111.

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10

张, 西晨. "STM32-Based Single-Phase Online Uninterruptible Power Supply System." Software Engineering and Applications 09, no. 06 (2020): 456–66. http://dx.doi.org/10.12677/sea.2020.96053.

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11

Lu, Jinghang, Mehdi Savaghebi, Saeed Golestan, Juan C. Vasquez, Josep M. Guerrero, and Albert Marzabal. "Multimode Operation for On-Line Uninterruptible Power Supply System." IEEE Journal of Emerging and Selected Topics in Power Electronics 7, no. 2 (June 2019): 1181–96. http://dx.doi.org/10.1109/jestpe.2018.2842436.

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12

Guerrero, Josep M., Lijun Hang, and Javier Uceda. "Control of Distributed Uninterruptible Power Supply Systems." IEEE Transactions on Industrial Electronics 55, no. 8 (August 2008): 2845–59. http://dx.doi.org/10.1109/tie.2008.924173.

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13

Vazquez, N., C. Aguilar, J. Arau, R. O. Caceres, I. Barbi, and J. A. Gallegos. "A novel uninterruptible power supply system with active power factor correction." IEEE Transactions on Power Electronics 17, no. 3 (May 2002): 405–12. http://dx.doi.org/10.1109/tpel.2002.1004248.

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14

Yeh, Chia-Chou, and Madhav D. Manjrekar. "A Reconfigurable Uninterruptible Power Supply System for Multiple Power Quality Applications." IEEE Transactions on Power Electronics 22, no. 4 (July 2007): 1361–72. http://dx.doi.org/10.1109/tpel.2007.900486.

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15

Palamar, A. "Methods and means of increasing the reliability of computerized modular uninterruptible power supply system." Scientific journal of the Ternopil national technical university 99, no. 3 (2020): 133–41. http://dx.doi.org/10.33108/visnyk_tntu2020.03.133.

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Анотація:

The problem of development and implementation of a simple and effective method of the rectifiers operation control for the modular uninterruptible DC power supply unit in order to increase its reliability is considered in this paper. The main idea of the method is to control the process of cyclic shifting of the switched-on power modules of the uninterruptible power supply by series switching into operation of each subsequent module from their unloaded reserve and switching out the previous one. The paper presents the control system structure where in addition to the central control module, it is proposed to add the control unit for power modules, which is responsible for implementing the process of their switching on and monitors their condition. In order to investigate the effectiveness of the proposed method, computer simulation model describing the power modules control logic is developed. The Simulink visual modeling environment and the mathematical tools of the Stateflow library component using state and transition diagrams are used in order to develop the simulation model. The developed simulation model is tested and the simulation results are given in the form of time diagrams of state change. The іmplementation of the developed method, due to the uniform reduction of the period during which the power modules of the uninterruptible power supply are on the switched-on loaded state, makes it possible to increase their operating time to failure, which in turn increases its reliability without deteriorating energy efficiency. The simulation results demonstrate the efficiency of the developed algorithm in various system operation modes. Based on the proposed method, hardware and software which is implemented as a part of intelligent computerized control system for uninterruptible DC power supply is created.

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16

Jahmeerbacus, M. I., and K. M. S. Soyjaudah. "Design of a Microcontroller-Based Passive Standby Uninterruptible Power Supply." International Journal of Electrical Engineering & Education 38, no. 4 (October 2001): 330–37. http://dx.doi.org/10.7227/ijeee.38.4.6.

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Анотація:

This paper describes the design of a microcontroller-based passive standby Uninterruptible Power Supply (UPS), where the student applies a top-down systems approach to produce a working system. Such a project involves hardware-software co-design for realizing the relatively large number of detection, protection and control functions within the UPS.

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17

., J. Devishree, and P. Anbalagan . "A Photovoltaic Uninterruptible Power Supply System Synchronised to the Grid." Journal of Applied Sciences 6, no. 12 (June 1, 2006): 2673–75. http://dx.doi.org/10.3923/jas.2006.2673.2675.

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18

Matsuzaki, Kaoru. "Technology for highly dependable large capacity uninterruptible power supply system." Electrical Engineering in Japan 115, no. 3 (June 1995): 85–95. http://dx.doi.org/10.1002/eej.4391150308.

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19

Vazquez, N., J. Villegas-Saucillo, C. Hernandez, E. Rodriguez, and J. Arau. "Two-Stage Uninterruptible Power Supply With High Power Factor." IEEE Transactions on Industrial Electronics 55, no. 8 (August 2008): 2954–62. http://dx.doi.org/10.1109/tie.2008.918475.

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20

Yuan, Weihao, Haifei Chi, and Zhishan Zhu. "An efficient and stable single-phase online uninterruptible power supply." E3S Web of Conferences 252 (2021): 01043. http://dx.doi.org/10.1051/e3sconf/202125201043.

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Анотація:

The system is an AC sine wave online uninterruptible power supply designed with STM32F407 as the main controller and full-bridge single-phase inverter as the core technology. The system is based on the STM32F407 single-chip microcomputer, and consists of a rectifier circuit, a BOOST circuit, a PFC power factor correction circuit, and a full-bridge single-phase inverter circuit. When the input of the system is switched between 29V~43V AC power supply and 24V DC power supply, the output voltage can maintain an AC sine wave with constant frequency and amplitude. Experimental data shows that the system has high operating efficiency and excellent stability.

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21

Liu, Shu Zhen. "Research on Switch Power Module Parallel Operation System." Applied Mechanics and Materials 599-601 (August 2014): 1657–60. http://dx.doi.org/10.4028/www.scientific.net/amm.599-601.1657.

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Анотація:

Switch power module parallel operation system is one of the technological developing directions of power with high-power output and uninterruptible supply. The paper puts forward a concept to design switch power module parallel operation system, which adopts two TPS5430 chips to compose DC-DC cell parallel and through their load sharing to control chip UCC39002 to implement DC-DC unit outputting equalized current. It succeeds in building experimental prototype.

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22

Kwon, Jung-Min. "Composite Energy Storage System with Photovoltaic Power Generation and Uninterruptible Power Supply Function." International Journal of Photoenergy 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/830341.

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Анотація:

A composite energy storage system (CESS) that includes a photovoltaic (PV) power generation and an uninterruptible power supply (UPS) function is proposed. This system has three operating modes, namely, a grid-connected inverter mode, a grid-connected rectifier mode, and an islanding mode. This system is composed of a boost converter, a three-phase inverter/rectifier, a bidirectional DC/DC converter, and thyristor switches. The boost converter extracts maximum power from the PV panels and sends it to the DC-link. The bidirectional DC/DC converter is connected between the battery and the DC-link, which leads to an optimized charging/discharging operation. The three-phase inverter/rectifier transmits the power to and from the grid. Also, it operates as a UPS in the islanding mode. The thyristor switches are used for connecting/disconnecting between the grid and the AC load. A 15 kW prototype is implemented to verify the performance of the proposed system.

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23

Fujii, Kansuke, Takayuki Kikuchi, and Kazuyuki Yoda. "Development of Medium-Voltage and Large-Capacity Uninterruptible Power Supply System." IEEJ Transactions on Industry Applications 130, no. 2 (2010): 189–94. http://dx.doi.org/10.1541/ieejias.130.189.

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24

Zhang, Wenping, Dehong Xu, Xiao Li, Ren Xie, Haijin Li, Dezhi Dong, Chao Sun, and Min Chen. "Seamless Transfer Control Strategy for Fuel Cell Uninterruptible Power Supply System." IEEE Transactions on Power Electronics 28, no. 2 (February 2013): 717–29. http://dx.doi.org/10.1109/tpel.2012.2204777.

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25

Bukhari, Syed Sabir Hussain, Shahid Atiq, Thomas A. Lipo, and Byung-il Kwon. "Line-interactive Uninterruptible Power Supply System Eliminating the Inrush Current Phenomenon." Electric Power Components and Systems 44, no. 11 (May 24, 2016): 1203–14. http://dx.doi.org/10.1080/15325008.2015.1137996.

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26

Singh, C., N. Gubbala, and N. Gubbala. "Reliability analysis of electric supply including standby generators and an uninterruptible power supply system." IEEE Transactions on Industry Applications 30, no. 5 (1994): 1298–302. http://dx.doi.org/10.1109/28.315242.

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27

Choi, Woojin, Jo W. Howze, and Prasad Enjeti. "Fuel-cell powered uninterruptible power supply systems: Design considerations." Journal of Power Sources 157, no. 1 (June 2006): 311–17. http://dx.doi.org/10.1016/j.jpowsour.2005.07.058.

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28

Reddy, Mrs G. Rajitha. "A Multi Energy Source UPS System using IOT." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (June 30, 2021): 3293–96. http://dx.doi.org/10.22214/ijraset.2021.35780.

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Анотація:

This paper presents the Multi energy source UPS system using IOT. This concept is very useful for the customers who want to achieve UPS (uninterruptible power supply) from various sources like solar, generator, main, and Battery Powered. This System will work Automatically or the user can Switch (manually) the Sources through wireless IOT platform.

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29

Zhan, Yuedong, Youguang Guo, Jianguo Zhu, and Hua Wang. "Intelligent uninterruptible power supply system with back-up fuel cell/battery hybrid power source." Journal of Power Sources 179, no. 2 (May 2008): 745–53. http://dx.doi.org/10.1016/j.jpowsour.2007.12.113.

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30

Pievatolo, A., E. Tironi, and I. Valade. "Semi-Markov Processes for Power System Reliability Assessment With Application to Uninterruptible Power Supply." IEEE Transactions on Power Systems 19, no. 3 (August 2004): 1326–33. http://dx.doi.org/10.1109/tpwrs.2004.826756.

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31

Tarczyński, Wiesław, and Ryszard Kopka. "Energy Storage System with the use of Supercapacitors." Zeszyty Naukowe Akademii Marynarki Wojennej 212, no. 1 (March 29, 2018): 137–51. http://dx.doi.org/10.2478/sjpna-2018-0008.

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Анотація:

Abstract The article presents an analysis of performance of an energy storage element used in uninterruptible power supply systems built with the use of supercapacitors. It describes the operation of the voltage balancing system during charging and discharging of the capacitors. Attention has been drawn to the energy conditions of the system's operation and solutions that provide enhanced energy efficiency have been described.

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32

Ashari, M., W. L. Keerthipala, and C. V. Nayar. "A single phase parallely connected uninterruptible power supply/demand side management system." IEEE Transactions on Energy Conversion 15, no. 1 (March 2000): 97–102. http://dx.doi.org/10.1109/60.849123.

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33

Zhaowei, Liu, Luo Jiapeng, and Zhu Guorong. "Design and implementation of online uninterruptible power supply system based on STM32." IOP Conference Series: Earth and Environmental Science 647 (January 27, 2021): 012009. http://dx.doi.org/10.1088/1755-1315/647/1/012009.

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34

Tian, Xu, Ying Dong Wei, and Qi Rong Jiang. "Research on Novel Uninterruptible Flexible Connector Device for Phase Separation in Electrified Railways." Advanced Materials Research 616-618 (December 2012): 580–85. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.580.

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Анотація:

Loss and recovery of power supply to electrified locomotives when passing neutral section will caused over voltage and over current in locomotives, which greatly threatens the safety of electrified railways and passengers. A novel uninterruptible flexible connector device is proposed, which comprises of two breakers, back-to-back converters and two transformers. This device can realize flexible switch between voltages of two traction feeders using phase shift technology at variable frequency and make locomotives run pass neutral section at rated power. System configuration, working principle, system-level and device-level control of uninterruptible flexible connector device are introduced and their correctness and effectiveness are validated through simulation.

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35

Han, Chun Juan, Fa Cheng Rui, Sheng Liu, and Shou Qin Tang. "Information Technology in Circuit Design of On-Line UPS." Advanced Materials Research 886 (January 2014): 505–8. http://dx.doi.org/10.4028/www.scientific.net/amr.886.505.

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Анотація:

Uninterruptible Power Supply plays an important role in critical load, such as: computer, communication system and hospital. They can provide reliable and pure power supply for loads neither power good or not. With the best performance, on- Line UPS provider most sufficient protection for loads power failure in various UPS. With the continuous development of power electronics technology and information industry, this article design a high quality and reliability UPS to meet modern development of science and technology.

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36

SAITO, Osamu, Gen KUWATA, and Shinobu SAITO. "Development of the Flywheel for Uninterruptible Power Supply(Mechanical Systems)." Transactions of the Japan Society of Mechanical Engineers Series C 76, no. 769 (2010): 2255–61. http://dx.doi.org/10.1299/kikaic.76.2255.

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37

Bower, W., and G. O'Sullivan. "Bimode uninterruptible power supply compatibility in renewable hybrid energy systems." IEEE Aerospace and Electronic Systems Magazine 5, no. 8 (August 1990): 16–22. http://dx.doi.org/10.1109/62.59265.

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38

Tian, Xu, Xingcheng Li, and Zibo Zhou. "Novel Uninterruptible Phase-Separation Passing and Power Quality Compensation Scheme Based on Modular Multilevel Converter for Double-Track Electrified Railway." Energies 13, no. 3 (February 7, 2020): 738. http://dx.doi.org/10.3390/en13030738.

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Анотація:

Over-voltage and over-current problems of locomotives when passing phase separation and negative sequence current penetration seriously influence the safety of double-track electrified railway and public power systems. In order to solve these problems, this paper proposes a novel uninterruptible power supply phase separation passing and power quality compensation (UPSP-PQC) scheme for double-track electrified railway. Three working modes of UPSP-PQC are put forward, including uninterruptible phase separation passing mode, power quality compensation mode and uninterruptible phase separation passing priority, and power quality compensation optimum mode. A three-leg modular multilevel converter (MMC) topology of UPSP-PQC is proposed and the corresponding control strategy has been studied. PSCAD/EMTDC simulation is performed to verify the correctness and effectiveness of the proposed scheme and its control method.

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39

Sun, Xiao Jing, Xing Gui Wang, and Chun Ning Wang. "The Research and Application of the Internal Combustion Engine Power Plant--Rotary UPS Monitoring Systems." Advanced Materials Research 328-330 (September 2011): 2207–10. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.2207.

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Анотація:

The Internal Combustion Engine Power Plant and Flywheel Battery were the two primarily compositive units of the Internal Combustion Engine Power Plant --Rotary UPS, among them the Internal Combustion Engine Power Plant ensured the continuous power supply to the load after the breaking of the mains supply, the Flywheel Battery ensured the uninterruptible continuous power supply to the load when mains supply switched to the Internal Combustion Engine Power Plant, so the paper started with the two units, Introduced the control system structure and principle, and focused on discussing the method of achieving the Internal Combustion Engine Power Plant --Rotary UPS telecommunication by Ethernet. The method had been applied in correlative production. The practice showed that it was convenient for usage and high reliability.

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40

Palamar, A. "Control system simulation by modular uninterruptible power supply unit with adaptive regulation function." Scientific journal of the Ternopil national technical university 98, no. 2 (2020): 129–36. http://dx.doi.org/10.33108/visnyk_tntu2020.02.129.

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41

Chen, Han Lin. "Fault Analysis of AC Uninterruptible Power Supply System in Gas Pipeline Compressor Station." Applied Mechanics and Materials 347-350 (August 2013): 1839–41. http://dx.doi.org/10.4028/www.scientific.net/amm.347-350.1839.

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Анотація:

Regarding the AC UPS fault accident happened in one compressor station which caused severe consequence with gas transmission pipeline, this paper lists the possible reasons based on the recorded fault code and equipment configuration, and solutions are proposed for modification. In the end, recommendations are given for the future project design of AC UPS.

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42

Lin, Qiongbin, Fenghuang Cai, Wu Wang, Sixiong Chen, Zhe Zhang, and Shi You. "A High-Performance Online Uninterruptible Power Supply (UPS) System Based on Multitask Decomposition." IEEE Transactions on Industry Applications 55, no. 6 (November 2019): 7575–85. http://dx.doi.org/10.1109/tia.2019.2935929.

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43

Ferraro, Marco, Francesco Sergi, Pasquale Cretì, Giovanni Brunaccini, Laura Andaloro, and Vincenzo Antonucci. "Direct Hydrogen 5.0 kW PEM Fuel Cell System Supplying an Uninterruptible Power Supply." ECS Transactions 5, no. 1 (December 19, 2019): 791–801. http://dx.doi.org/10.1149/1.2729060.

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44

Danayiyen, Yahya, Kyungsuk Lee, Minho Choi, and Young Il Lee. "Model Predictive Control of Uninterruptible Power Supply with Robust Disturbance Observer." Energies 12, no. 15 (July 25, 2019): 2871. http://dx.doi.org/10.3390/en12152871.

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Анотація:

This paper presents a robust continuous control set model predictive control (CCS-MPC) method to control the output voltage of a three-phase inverter in uninterruptible power supplies (UPS). A robust disturbance observer (DOB) is proposed to estimate the load current of the three-phase UPS without a steady-state error, taking the effect of model uncertainties into account. A CCS-MPC is designed using the DOB for reference voltage tracking purpose, and input constraints are considered in the controller design to calculate the optimal control input. Model uncertainties are defined using polytopic uncertainty class, and a linear matrix inequality (LMI) optimization method is used to compute the optimal observer gain matrix. Another robust controller (RC) is designed based on the DOB and compared with CCS-MPC. The effectiveness of the proposed method (the DOB based CCS-MPC) is evaluated for resistive, inductive, and nonlinear loads then compared with other control methods using a three-phase 5-KVA laboratory experiment UPS system.

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45

Zhi Jian Zhou, Xing Zhang, Po Xu, and W. X. Shen. "Single-Phase Uninterruptible Power Supply Based on Z-Source Inverter." IEEE Transactions on Industrial Electronics 55, no. 8 (August 2008): 2997–3004. http://dx.doi.org/10.1109/tie.2008.924202.

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46

Palamar, Andriy, Elmo Pettai, and Viktor Beldjajev. "Control System for a Diesel Generator and UPS Based Microgrid." Scientific Journal of Riga Technical University. Power and Electrical Engineering 26, no. 1 (January 1, 2010): 48–53. http://dx.doi.org/10.2478/v10144-010-0019-x.

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Control System for a Diesel Generator and UPS Based MicrogridIn this paper a microgrid composed of a diesel generator and two uninterruptible power supply systems with separate battery banks is introduced. The microgrid located in three academic buildings of Tallinn University of Technology. A three-level control and monitoring system for the microgrid based on the EtherNet/IP communication network is developed. In addition, a control strategy of the microgrid in the grid-connected and stand-alone mode of operation is proposed.

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Ferdiansyah, Indra, Indhana Sudiharto, Epyk Sunarno, and Mahbub Gusti Muhammad. "DESAIN SPWM SINGLE PHASE FULL BRIDGE INVERTER PADA SISTEM UNINTERRUPTIBLE POWER SUPPLY 500W." Jurnal Arus Elektro Indonesia 7, no. 1 (May 23, 2021): 10. http://dx.doi.org/10.19184/jaei.v7i1.23438.

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Indonesia has sufficient power resources provided by PLN. However, blackouts still occur frequently due to several reasons, such as disruption in transmission and distribution, especially when the weather is raining. This has an impact on customer inconvenience. To overcome this, several houses have used a backup power source in the form of a generator set that will be operated by a blackout. This solution turns out to cause noise that can interfere with user comfort. To increase user convenience, a system (Uninterruptible Power Supply) is proposed. The system there is a voltage sensor to detect a power outage. In addition, there is an SSR switch so that it can to switch main source to the UPS with a fast response time during a blackout. The inverter on UPS system uses the SPWM technique to produce a sine wave output, then the use of an LC filter to reduce ripple on the system. PID-based voltage control is used to maintain the output inverter by the setting value of magnitude amplitude. Based on the results of the test, the UPS can work during a blackout with a maximum power of 500W and the voltage constant at 215V. Keywords — Blackout, PI Controller , SPWM, UPS.

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Lu, Jinghang, Josep M. Guerrero, Mehdi Savaghebi, Amer M. Y. M. Ghias, Yajuan Guan, Xiaochao Hou, and Juan C. Vasquez. "An Effective Solution for Regeneration Protection in Uninterruptible Power Supply." IEEE Transactions on Industry Applications 55, no. 3 (May 2019): 3055–65. http://dx.doi.org/10.1109/tia.2019.2900601.

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Al Kadhimi, Basim Mohammed. "Analysis for Industrial Grid Containing Nonlinear Loads." Wasit Journal of Engineering Sciences 5, no. 1 (April 12, 2018): 35–58. http://dx.doi.org/10.31185/ejuow.vol5.iss1.64.

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Harmonics is the most important issue among all issues related to the power quality. Harmonics comes from different non-linear loads like uninterruptible power supplies systems (UPS), variable speed motor drives, rectifiers, personal computers, adjustable speed drives, fluorescent lighting, rectifier banks, data processing loads, arc furnaces, and so on. Simulation of a real power supply system that consists of linear loads and nonlinear loads as variable speed drives has been carried out in the work. Variable speed drives generate harmonics into supply system that contains different values of compensated capacitors. Calculations of equivalent system reactance for generated harmonics, voltage harmonics, voltage harmonics in percentage, THD (Total Harmonic Distortion) of voltage, frequency characteristics, current flows in the system capacitor units have been worked out using Mathcad software. The obtained results have been compared with the European Standard (EN 50160) for supply quality requirements of the European Union.

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Le, Phuong Minh, Dzung Quoc Phan, Huy Minh Nguyen, and Phong Hoai Nguyen. "Designing an uninterruptible power supply based on the high efficiency push–pull converter." Science and Technology Development Journal 16, no. 3 (September 30, 2013): 29–40. http://dx.doi.org/10.32508/stdj.v16i3.1610.

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This paper presents an implementation of the DC/DC push–pull converter for an uninterruptible power supply (UPS). Some classical DC/DC converters are presented and analyzed for pointing out their advantages and drawbacks. Besides, an original system based on a push-pull converter associated with a dynamic modulation control is chosen. The main advantage is the possibility to control the delivered electric power in a wide range from very low level to high level of voltage within the same basic architecture. It can reduce the switching power losses and increase the power conversion efficiency. This paper proposed a new control scheme of the DC/DC converter and DC/AC inverter. The suggested system consists of a high efficiency DC/DC converter and a singlephase DC/AC inverter has been simulated using Matlab/Simulink and designed basing on the DSP TMS320F28027. Both results show high performances of the DC link and AC load voltages, when load changes from zero to rated. The performance of the proposed system has been verified through a 1kW prototype of the system for a 50 Hz/220-230 VAC load sourcing by two series connected batteries of 12V. The proposed DC/DC converter achieves a high efficiency of 93.0%. The system including the DC/DC converter and DC/AC inverter achieves an efficiency of 91.2% and Total Harmonic Distortion (THD) of AC load voltage reached 1.9%.

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