Journal articles: 'Three-phase power supply system'

1

Singh, Shikha, Gurumoorthy Bhuvaneswari, and Bhim Singh. "Power Quality Improvement in Three-phase Telecommunication Power Supply System." Electric Power Components and Systems 43, no. 19 (October 9, 2015): 2105–15. http://dx.doi.org/10.1080/15325008.2015.1077486.

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Khan, M. Rizwan, Rashid Alammari, Shaikh Moinoddin, and Atif Iqbal. "Modelling and Analysis of a Three-Phase to Five-Phase Transformer." International Journal of Emerging Electric Power Systems 15, no. 4 (August 1, 2014): 401–10. http://dx.doi.org/10.1515/ijeeps-2012-0062.

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Abstract Multi-phase systems are the focus of research in recent times due to their inherent advantages compared to the three-phase counterpart. A lot of research effort has been put to develop commercially feasible multi-phase drive systems. There is a necessity to develop a static phase transformation system to obtain multi-phase supply from available three-phase grid. This paper presents an extension of a novel transformer connection scheme to convert three-phase supply to five-phase fixed voltage and fixed frequency supply already published. The various simulation and experimental results are reported in this paper to prove the viability of system.

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Ivanov, V. B. "Modeling of three-phase inverter power supply system in Simulink." IOP Conference Series: Materials Science and Engineering 1032 (January 21, 2021): 012054. http://dx.doi.org/10.1088/1757-899x/1032/1/012054.

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Artemenko, M. Yu, V. V. Chopyk, V. M. Mikhalsky, I. A. Shapoval, and S. Y. Polishchuk. "IDENTIFICATION OF THE POWER OF THE IMBALANCE OF THE THREE-PHASE FOUR-WIRE POWER SUPPLY SYSTEM FOR THE NEEDS OF ITS DISTRIBUTED COMPENSATION." Tekhnichna Elektrodynamika 2022, no. 2 (March 19, 2022): 12–20. http://dx.doi.org/10.15407/techned2022.02.012.

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The idea of distributed active filtration is to compensate for the currents of higher harmonics and undesirable components of the power of the main network with inverters of renewable energy converters of the connected microgrid, which have reserves of apparent power. For the convenience of distributed compensation, it is proposed to identify the sinusoidal mode of the three-phase four-wire power system, provided that the symmetric source is six mutually orthogonal components of the three-coordinate vector of line currents. The power of imbalance is shown to be due to four mutually orthogonal components of the three-coordinate vector of line currents with defined reference voltage vectors, each of which is proportional to a separate orthogonal component of the power of imbalance. Integral formulas for determining the scalar values of the four specified orthogonal components of imbalance powers have been obtained, which open the possibility of accounting for their contribution to the deterioration of the quality of electrical energy and the synthesis of control signals for active distributed filtration. The connection between the four specified orthogonal components of the power of imbalance and the parameters of the linear unbalanced load was established, which made it possible to verify these integral formulas using a computer experiment. It is analytically established and experimentally confirmed that the squares of the two orthogonal components of the imbalance powers associated with the current of the neutral wire are included in the decomposition of the square of apparent power and power losses with the multiplier, depending on the ratio of the resistances of the transmission line of the three-phase four-wire power system. References 17, figures 3.

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Chaban, Andriy, Marek Lis, Andrzej Szafraniec, and Vitaliy Levoniuk. "Mathematical Modelling of Transient Processes in a Three Phase Electric Power System for a Single Phase Short-Circuit." Energies 15, no. 3 (February 3, 2022): 1126. http://dx.doi.org/10.3390/en15031126.

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Field approaches are employed to develop a mathematical model of a power network section. The facility consists of two electric power subsystems described with ordinary differential equations and presented as concentrated parameter systems connected with a three-phase power supply line, presented as a distributed parameter system. The model of the electric power line is described with partial differential equations. Mathematically, the supply line model is described utilizing a mixed problem with explicitly indefinite boundary conditions. All electromagnetic state equations of the integrated system are introduced in their matrix-vector forms. The equation of the three-phase long supply line is expressed untraditionally as a system of two first-order differential equations as a function of long line voltage. Since the power supply line is part of the integrated system that includes two subsystems, the boundary conditions at the line’s start and end are implicitly defined, avoiding the traditional application of the Dirichlet first-type boundary condition. An expanded system of ordinary differential equations that describe physical processes in both the supply and loading subsystems is used to calculate the boundary conditions. To this end, third-type boundary conditions, or Poincaré’s conditions, serve to describe the wave equation of the electric power line. Such an integrated model of an electric power system helps analyse transient processes across the supply line when the electric power system is switched on and is single-phase short-circuited at the final point of the electric power line. A comparison of computer simulation results with well-known software packages shows a convergence of approx. 96%.

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Hayashi, Yusuke, Toshifumi Ise, and Kiichiro Tsuji. "Unbundled Power Quality Supply System with Three-Phase Four-Wire ac System." IEEJ Transactions on Power and Energy 121, no. 12 (2001): 1777–87. http://dx.doi.org/10.1541/ieejpes1990.121.12_1777.

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Nor, N. M., N. S. Zemri, S. A. Daud, T. Ibrahim, and H. Daud. "Development of an Automated Three-Phase Distribution Box System." Indonesian Journal of Electrical Engineering and Computer Science 6, no. 2 (May 1, 2017): 233. http://dx.doi.org/10.11591/ijeecs.v6.i2.pp233-240.

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Most electrical appliances require continuous power supply. For domestic use, crucial appliances such as refrigerator, aquarium and alarm system highly depend upon the continuity of power supply. However, if they are left without electricity due to power outage or blackouts caused by internal or external disturbance, the discontinuity of power supply could be a critical issue to some involving party. Blackouts may be due to short circuit, fault or the overloading of electricity mains. During power outage, Residual Current Device (RCD) detects fault currents from live to the neutral wire within circuit and will trip to prevent shock. This circumstance can increase safety when a house is left unoccupied. Be that as it may, the power will remain switched off until manually reset by man. Thus, this paper presented a new concept of Three-Phase distribution box system in order to overcome tripping problem. This system will be able to identify and isolate the fault using measurement of current flow into each Miniature Circuit Breaker (MCB) of appliances and current flowing out from each of the load. The measured current value will be compared and the maximum allowable difference is 30mA. If the current difference exceeds the maximum limit then the fault MCB will be detected. Hence RCD will be automatically close the circuit after determining the fault location via the motor operation to make sure of power stability and evade any property loss.

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Sevostyanov, A. A. "METHOD FOR ANALYSIS OF POWER QUALITY IN THREE-PHASE INDUSTRIAL POWER SUPPLY SYSTEM." Интеллектуальная электротехника, no. 3 (2020): 4–15. http://dx.doi.org/10.46960/2658-6754_2020_3_4.

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Hayashi, Yuji, Hiromasa Motoyama, and Takaharu Takeshita. "Power Flow Control in Wireless Power Supply System Using Three-Phase to Single-Phase Matrix Converter." IEEJ Transactions on Industry Applications 139, no. 10 (October 1, 2019): 880–89. http://dx.doi.org/10.1541/ieejias.139.880.

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10

Cai, Hui, Hong Yan, Wei Min Chen, and Qing Li. "Design of a Balanced Three-Phase Power Supply Soft-Switching Based on Single-Phase Inverter Power." Applied Mechanics and Materials 263-266 (December 2012): 803–8. http://dx.doi.org/10.4028/www.scientific.net/amm.263-266.803.

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To eliminate the negative effects caused by three-phase unbalanced distribution, a novel soft-switching system based on single-phase inverter is proposed. The system achieves three-phase equilibrium distribution by adjusting the power supply of the electric equipments. This paper presents a track strategy named regulating frequency to promise no impulse current, which means regulating the output frequency of the inverter to make the output voltage of the inverter synchronize with the grid voltage. Firstly, make the output voltage of the inverter synchronize with the voltage of original access phase, then switch the electric equipment to the inverter. Secondly, make the output voltage of the inverter synchronize with the voltage of alternative access phase, then switch the electric equipment to the alternative access phase to accomplish the soft-switching. MATLAB software and experiment are used to carry out verification for this system. The result shows that the impulse current is practically zero when the electric equipments are switching. The system achieves soft-switching.

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Zakaryukin, Vasily P., and Andrey V. Kryukov. "MODELING POWER SUPPLY SYSTEMS WITH THREE-PHASE AND SINGLE-PHASE CONVERTERS." Proceedings of Irkutsk State Technical University 22, no. 5 (May 2018): 122–33. http://dx.doi.org/10.21285/1814-3520-2018-5-122-133.

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He, Xiaoqiong, Zeliang Shu, Xu Peng, Qi Zhou, Yingying Zhou, Qijun Zhou, and Shibin Gao. "Advanced Cophase Traction Power Supply System Based on Three-Phase to Single-Phase Converter." IEEE Transactions on Power Electronics 29, no. 10 (October 2014): 5323–33. http://dx.doi.org/10.1109/tpel.2013.2292612.

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Al-Ammari, Rashid, Atif Iqbal, Amith Khandakar, Syed Rahman, and Sanjeevikumar Padmanaban. "Systematic Implementation of Multi-Phase Power Supply (Three to Six) Conversion System." Electronics 8, no. 1 (January 18, 2019): 109. http://dx.doi.org/10.3390/electronics8010109.

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Multiphase (more than three) power system has gained popularity due to their inherent advantages when compared to three-phase counterpart. Multiphase power supply is extensively used in AC/DC multi-pulse converters, especially supply with multiple of three-phases. AC/DC converter with multi-pulse input is a popular solution to reduce the ripple in the DC output. Single-phase and three-phase transformers and phase transformation from single to multiphase are employed in variable speed drives application to feed the multi-cell H-Bridge converters and multi-pulse AC-DC converters. Six-phase system is extensively discussed in the literature for numerous applications ranging from variable speed drives to multiphase wind energy generation system. This paper shows the systematic phase transformation technique from three-phase to six-phase (both symmetrical and asymmetrical) for both understanding and teaching purposes. Such an approach could help students understand a promising advanced concept in their undergraduate courses. When phase difference between the two consecutive phases of six phases has a phase difference of 60, it is called a symmetrical six-phase system; while an asymmetrical or quasi, six-phase has two set of three-phase with a phase shift of 30 between the two sets. Simulation and experimental results are also presented.

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Fandi, J. C. O., J. R. Macedo, I. N. Gondim, J. C. de Oliveira, and G. C. Guimaráes. "Two-Wire Distribution System for Power Supply to Three-Phase Rural Facilities." IEEE Latin America Transactions 12, no. 2 (March 2014): 182–89. http://dx.doi.org/10.1109/tla.2014.6749536.

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Sorokin, D. A., S. I. Volskiy, and Y. Y. Skorokhod. "Three-phase power factor corrector with direct power control and power supply of the unbalanced industrial network." E3S Web of Conferences 124 (2019): 05017. http://dx.doi.org/10.1051/e3sconf/201912405017.

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Nowadays three-phase power factor correctors (PFC) became widely used. This is dictated by strict requirements of the international electrical technical commission standards to harmonic composition of current supplied by three-phase industrial network. New schematic technical version of three-phase PFC having direct power control and improved efficiency factor is presented. Mathematical description of power component and control system taking in account its functioning depending upon asymmetrical three-phase input voltage was fulfilled. The electrical processes in the presented PFC was analysed by means of computer simulation. The obtained results are of interest to the persons engaged in the development of electrical energy systems and complexes to which higher requirements in respect to power loss reduction and reliable functioning in case of three-phase asymmetrical industrial network are imposed.

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Agunov, A. V., A. T. Burkov, and M. A. Ivanov. "Model of the traction and external power supply system joint operation." Journal of Physics: Conference Series 2131, no. 4 (December 1, 2021): 042093. http://dx.doi.org/10.1088/1742-6596/2131/4/042093.

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Abstract The paper presents a description of mathematical model designed to study the joint operation of 25 kV alternating current traction power supply systems and 110 - 750 kV power supply systemsThe design concept of three-phase and single-phase PU-generators on the basis of the EMF source behind inductive resistance as well as three-phase and single-phase loads is considered. Based on the above mathematical expressions, a computer model has been developed to analyze the joint operation of three-phase networks of external power supply and single-phase traction networks. The model is implemented in the software package MATLAB -Simulink. Using this computer model the influence of power overflows in the 110 - 330 kV network of PJSC “Karelenergo” and PJSC “FGC UES” on the equalizing currents in the traction network of the Knyazhaya-Idel’ section of the October railroad was analyzed. Brief analysis of modeling results is presented.

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He, Xiaoqiong, Haijun Ren, Jingying Lin, Pengcheng Han, Yi Wang, Xu Peng, and Zeliang Shu. "Power Flow Analysis of the Advanced Co-Phase Traction Power Supply System." Energies 12, no. 4 (February 24, 2019): 754. http://dx.doi.org/10.3390/en12040754.

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The development of the traction power supply system (TPSS) is limited by the existence of the neutral section in the present system. The advanced co-phase traction power supply system (ACTPSS) can reduce the neutral section completely and becomes an important research and development direction of the railway. To ensure the stable operation of ACTPSS, it is necessary to carry out an appropriate power analysis. In this paper, the topology of advanced co-phase traction substation is mainly composed by the three-phase to single-phase cascaded converter. Then, the improved PQ decomposition algorithm is proposed to analyze the power flow. The impedance model of the traction network is calculated and established. The power flow analysis and calculation of the ACTPSS with different locations of locomotive are carried out, which theoretically illustrates that the system can maintain stable operation under various working conditions. The feasibility and operation stability of the ACTPSS are verified by the simulations and low power experiments.

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OWOJORI, ADEDOTUN O., ABIODUN M. AKINBOLADE, and KAYODE F. AKINGBADE. "DESIGN ANALYSIS OF AN AUTOMATIC PHASE SELECTOR." Journal of Engineering Studies and Research 27, no. 3 (January 10, 2022): 51–63. http://dx.doi.org/10.29081/jesr.v27i3.288.

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Power instability in Nigeria caused by overbearing demand of power by consumers and lack of proper maintenance of the power system devices among others has brought about the need for alternative power sources such as generators, solar, typical inverters and other alternative supplies which requires one form of switching or the other to achieve phase selection during power failure. This paper gives a design analysis of an automatic phase selector linking available power supplies, that is; switching between a three-phase public utility supply, as a result of total power outage in the public supply to an alternative secondary supply (in this case a Generator and an Inverter system) and back when power is restored. The design adopts the use of a microcontroller-based system interconnected with other hardware components for proper isolation, switching and visualization of switching conditions. The system design is divided into two major part: the hardware which consists of the power supply, sensing circuit, controller or control logic circuit, display and the power electronics switching unit and the software instruction code on the microcontroller unit. The design analysis was first carried out accompanied with computer simulation on a software tool (Proteus 8 Professional, version 8.4) to carry out performance evaluation of the sub-circuits, thereafter, a practical implementation of the design was carried out and tested with the utility power supply using five (5) switches, three of which represents the three-phase primary supply and the other two represents the secondary supply.

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Singh, Bhim, and Ram Niwas. "Single-Phase Power Generation Using Three-Phase Self-Excited Synchronous Reluctance Generator." International Journal of Emerging Electric Power Systems 15, no. 4 (August 1, 2014): 377–88. http://dx.doi.org/10.1515/ijeeps-2014-0006.

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Abstract This paper presents the single-phase power generation using a three-phase synchronous reluctance generator (SyRG) for a standalone diesel generator (DG) set based standalone supply system. A static compensator (STATCOM) is used for voltage control, harmonics reduction and load balancing on SyRG. The proposed system consists of a SyRG, a variable frequency drive of an induction motor used as a prototype of diesel engine (DE), a STATCOM and single-phase loads. The proposed system feeds single-phase loads in rural areas and telecom towers. The synchronous reference frame theory (SRFT)–based control algorithm is used for the control of STATCOM used for voltage control and load balancing of SyRG.

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Guo, Cheng, Lianghui Yang, and Liyan Zhang. "Low-voltage power supply system based on three-phase to two-phase and integrated power quality control method." IOP Conference Series: Materials Science and Engineering 677 (December 10, 2019): 052089. http://dx.doi.org/10.1088/1757-899x/677/5/052089.

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KOLAR, JOHANN W., and FRANZ C. ZACH. "A NOVEL THREE-PHASE THREE-SWITCH THREE-LEVEL UNITY POWER FACTOR BOOST-TYPE PWM RECTIFIER." Journal of Circuits, Systems and Computers 05, no. 03 (September 1995): 479–501. http://dx.doi.org/10.1142/s0218126695000308.

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Based on the combination of a three-phase diode bridge and a DC/DC boost converter a new three-phase three-switch three-level PWM rectifier system is developed. It can be characterized by sinusoidal mains current consumption, controlled output voltage and low blocking voltage stress on the power transistors. The application could be, e.g., for feeding the DC link of a telecommunications power supply module. The stationary operational behavior, the control of the mains currents and of the output voltage are analyzed. Finally, the stresses on the system components are determined by digital simulation and compared to the stresses in a conventional PWM rectifier system.

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Wang, Yuan, Xiao Qiong He, Ze Liang Shu, Zheng Xiang Xu, and Ying Ying Zhou. "Study of Droop Characteristic in Advanced Co-Phase Traction Power Supply System." Applied Mechanics and Materials 380-384 (August 2013): 3118–23. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.3118.

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The disadvantages of two existing traction power supply modes are analyzed and advanced co-phase traction power supply system based on three-phase to single-phase converter is studied in the paper. Then, the chain model of network and the constant power model of locomotive are established. According to the above results, further analysis of the circulating-impedance and the feasibility study of droop control in this system are presented. The circulating-current analysis results of the advanced co-phase traction power supply system and the droop control of the system are given in the end of the paper.

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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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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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Wu, Si, Mingli Wu, and Yi Wang. "A Novel Co-Phase Power-Supply System Based on Modular Multilevel Converter for High-Speed Railway AT Traction Power-Supply System." Energies 14, no. 1 (January 5, 2021): 253. http://dx.doi.org/10.3390/en14010253.

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The existing problems of the traction power-supply system (i.e., the existence of the neutral section and the power quality problems) limit the development of railways, especially high-speed railways, which are developing rapidly worldwide. The existence of the neutral section leads to the speed loss and traction loss as well as mechanical failures, all of which threaten the fast and safe operation of the train and the system. Meanwhile, the power quality problems (e.g., the negative sequence current, the reactive power, and the harmonic) can bring a series of problems that cannot be ignored on the three-phase grid side. In response, many researchers have proposed co-phase power-supply schemes to solve these two problems simultaneously. Given that the auto-transformer (AT) power-supply mode has become the main power-supply mode for the high-speed railway traction power-supply system, it has a bright future following the rapid development of the high-speed railway. In addition, there is no co-phase power-supply scheme designed for AT power-supply mode in the existing schemes. Therefore, the main contribution of this paper is to propose a specifically designed power-supply mode more suitable for the AT, as well as to establish the control systems for the rectifier side and the inverter side. In addition, for the proposed scheme, the operation principle is analyzed, the mathematical model is built, and the control system is created, and its functionality is verified by simulation, and its advantages are compared and summarized finally. The result proves that it can meet functional requirements. At the same time, compared with the existing co-phase power-supply scheme, it saves an auto-transformer in terms of topology, reduces the current stress by 10.9% in terms of the current stress of the switching device, and reduces the power loss by 0.25% in terms of the entire system power loss, which will result in a larger amount of electricity being saved. All of this makes it a more suitable co-phase power-supply scheme for the AT power-supply mode.

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Yuan, Chuanlai, Lingshuang Kong, Can Hu, and Weilong Zhou. "Design and Experimental Research of Agricultural Low Power Singlephase Frequency Conversion Control System Based on SPWM." Open Electrical & Electronic Engineering Journal 9, no. 1 (October 9, 2015): 490–95. http://dx.doi.org/10.2174/1874129001509010490.

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In the countryside of China, the main power supply mode is 220V single-phase power, which affects the widely application of three-phase agricultural appliances. What’s more, it means a block to the development of modern agriculture. However, frequency converter technique research is focused on three-phase high power frequency conversion technology at present, and there are very few achievements on the agricultural low power single-phrase frequency conversion research. In this paper, considering the difficulty of widely application of agricultural low power three-phase AC motor because it is not easy to obtain the three-phase power supply, a three-phase AC frequency conversion system under the condition of agricultural 220V single-phase AC power is designed, which can achieve the stepless regulation of the voltage amplitude and guarantee the widely use of the three-phase AC motor under the condition of agricultural 220V singlephase AC power. The experimental results show that the system can output the controlled three-phase AC power when the input is 220V single-phase AC power. And the rational design of the system hardware also provides the technical support for the application of agricultural low power frequency conversion.

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Raj, Sumit, Rajib Kumar Mandal, and Mala De. "A Single-Stage Three Phase CT-Type MLI for Grid Integration and for Supplying Critical Loads." Journal Européen des Systèmes Automatisés 54, no. 5 (October 31, 2021): 713–20. http://dx.doi.org/10.18280/jesa.540506.

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Power system reliability and resiliency involves availability of uninterrupted power supply to loads. With ever-increasing natural and man-made disturbances in power grid, the need of alternate renewable based source of supply is gaining more attention. This paper presents an efficient renewable energy-based single stage configuration for standalone application to provide uninterrupted power supply to critical loads in case of grid power interruption. This configuration can also be used for grid integration during peak load demand of power. The advancement in research of Multilevel Inverter (MLI) relating to high voltage with high power energy control enabled increased use of MLI in renewable energy, especially PV and fuel cell-based systems. The renewable energy-based configuration proposed in this paper uses Cross T-Type (CT-Type) MLI which provides quality output power from solar PV, fuel cell etc. Moreover, the absence of any DC-DC converter reduces complexity and makes the system more economical for grid integration. The overall system performance improves compared to existing methods in terms of total harmonic distortion (THD), total standing voltage (TSV), number of levels, number of components requirement and efficiency.

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Wang, Jing, and Pei Wang. "Power Monitoring System Based on LabView in the Application of Intelligent Building." Applied Mechanics and Materials 333-335 (July 2013): 2475–78. http://dx.doi.org/10.4028/www.scientific.net/amm.333-335.2475.

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In the intelligent building, the existing power supply and distribution monitoring system is mainly monitoring the voltage, current, power factor and other parameters of power supply equipments, lack of power quality monitoring, analysis and graphical display. In order to improve the power supply and distribution monitoring system in the intelligent building, this article designs a power monitoring system based on LabView, to monitor and analyze the basic parameters, harmonic, three-phase imbalance degree of power supply and distribution.

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Liu, Yu, Shi Qi Wei, Xiao Xu Gu, Sen Lei Zhao, and Bin Yu Wang. "Design on Electrostatic Precipitator Control System." Applied Mechanics and Materials 536-537 (April 2014): 1166–69. http://dx.doi.org/10.4028/www.scientific.net/amm.536-537.1166.

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This paper describes the frequency electrostatic dust-phase power design, triggered by SCR phase control method to achieve closed-loop control of three-phase AC voltage regulator of the main circuit, designed three fold spark for spark control tracking control algorithm. Electrostatic precipitator and main circuit power supply is simulated, and the main circuit parameters were calculated, the results show that the system can be better used in industrial environments dust.

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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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Zheng, Zai Ping, Yu Ping Huang, Yue Zhong, and Hong Xing Wu. "Study of the Two-Phase Operation Mechanism of Three-Phase Motors Based on LC Phase Shifting Method." Applied Mechanics and Materials 741 (March 2015): 714–19. http://dx.doi.org/10.4028/www.scientific.net/amm.741.714.

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In the absence of three-phase power supply, it has certain practical significance to connect the three-phase induction motor to the single-phase power supply for single phase operation. This paper analyzes the asymmetric circuit system of the motor by the method of symmetrical components-Lc phase shifting, disassembles the voltage and current of the three-phase motor stator winding into three groups of symmetrical components: positive sequence, negative sequence and zero sequence. We derivate and analysis the LC phase shifting method to simulate and validate the Lc phase shifting method theory, deduce the formula for calculating of optimum external capacitance and inductance, simulate and calculate all kinds of single phase operation method, finally we use the simulation software to simulate and validate three-phase induction motors single phase operation.

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Chang, Fei, Zhongping Yang, and Fei Lin. "Research on Control Strategy of AC-DC-AC Substation Based on Modular Multilevel Converter." Mathematical Problems in Engineering 2017 (2017): 1–14. http://dx.doi.org/10.1155/2017/4157165.

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Significant disadvantages in power quality especially the unbalance problem and neutral sections restrict the evolution of conventional traction power supply system. A new traction power supply system based on three-phase to single-phase converter is studied, which can transfer active power from three-phase grid to single-phase catenary. One catenary section could be utilized in the new traction power supply system instead of the multiple split sections in conventional system. Three-phase to single-phase converter is the core equipment of new traction power system. MMC (modular multilevel converter) structure of AC-DC-AC substation is proposed in this paper. To solve the problem of the capacitor voltage balancing in MMC, a parallel sorting algorithm based on field programmable gate array (FPGA) is studied. And the correctness and effectiveness of the algorithm are verified by experiments. In addition, it is inevitable that the AC grid voltage will be unbalanced caused by the fault in the new system. Therefore, this paper focuses on the analysis of the effect of the unbalanced grid voltage on the operating characteristics of the MMC system. Finally, the correctness of the theoretical analysis is verified by simulation.

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Kini, P. Giridhar, R. C. Bansal, and R. S. Aithal. "Impact of voltage unbalance on the performance of three-phase induction motor." South Pacific Journal of Natural and Applied Sciences 24, no. 1 (2006): 45. http://dx.doi.org/10.1071/sp06007.

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Availability of quality power has become an important issue for industrial utilities due to frequent performance variations in process industries. Increase in the generating capacity has not kept up pace of power demand, which results into shortage of power supply and power system network is normally subjected to varying and unequal loads across the three phases. Continuous variation of single-phase loads on the power system network leads to voltage variation and unbalance, most importantly; the three-phase voltages tend to become asymmetrical in nature. Application of asymmetrical voltages to induction motor driven systems severely affects its working performance. This paper presents the effects of voltage variation and unbalance on the performance of an induction motor driven centrifugal pump with a case study.

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Zhao, Yuanzhe, Qunzhan Li, Yankun Xia, and Zeliang Shu. "Research on Co-phase Power Supply Test System." Energy and Power Engineering 05, no. 04 (2013): 522–26. http://dx.doi.org/10.4236/epe.2013.54b100.

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Giri, Tilak, Ram Prasad Pandey, Sabin Bhandari, Sujan Moktan, and Lagat Karki. "Design and Simulation of three Phase three Wire Shunt Active Filter using Instantaneous PQ Theory." Journal of the Institute of Engineering 15, no. 1 (February 16, 2020): 181–86. http://dx.doi.org/10.3126/jie.v15i1.27728.

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Due to intensive use of power converters and other non-linear loads, power quality is degrading. The presence of harmonics in the power lines result in greater power losses in distribution, interference problems in communication systems. Non linearity reduces the efficiency and power factor of the system. As the power factor reduces, the reactive power demanded from the supply increases which have no any contribution in energy transfer, so compensation is required. For this, shunt passive filter has been developed but it is bulky and frequency dependent and has many drawbacks. In contrast to passive filter, shunt active filter (SAF) has been developed which is smaller and has wide range of applications. In this paper, shunt active filter based on p-q theory is demonstrated for compensating reactive power and current harmonics. Simulation has been done with and without SAF and results are presented and ended with recommendation and conclusion. An effort is made to reduce the THD of the source current below 5% (specified by IEEE).

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Chan, Wai Lok, and Albert So. "A cost effective power meter for lift systems based on a novel definition of total power factor." Transactions of the Institute of Measurement and Control 41, no. 14 (May 12, 2019): 3899–908. http://dx.doi.org/10.1177/0142331219841123.

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Most lift systems are fed by a 3-Phase-3-Wire (3P3W) supply with unbalanced line currents and slightly unbalanced line voltages, as experienced by the authors. Then, power meters available in the market may not give a consistent total power factor (TPF), one important electrical parameter to describe how well the supply feeds its load for lift systems because existing definitions have not been developed to take care of such situations. The main problem is related to the estimation of the apparent power, S, of an unbalanced 3P3W system. A new definition mainly for 3P3W lift systems was previously proposed from the supply perspective, with a new method to convert the measurable three line voltages into hypothetical 3-phase voltages of such 3P3W system. This definition was recently adopted by the Hong Kong Special Administrative Region government in the latest building energy code. In this article, the following contributions are made. The method of conversion was shown to bear a special meaning in geometry, where the sum of magnitudes of the three hypothetical phase voltages is minimum. A new definition of TPF from the load point of view was proposed and compared with that from the supply point of view. For the sake of statutory implementation of the definition in Hong Kong, a new digital power meter specialized for a lift or escalator system was developed. Such power meter is of low cost and optimal design due to the use of only four channels of data sampling versus the six channels of meters commonly available in the market.

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Nasiri, Adel. "Digital Control of Three-Phase Series-Parallel Uninterruptible Power Supply Systems." IEEE Transactions on Power Electronics 22, no. 4 (July 2007): 1116–27. http://dx.doi.org/10.1109/tpel.2007.900546.

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Shin, Hee-Keun, Hag-Wone Kim, Kwan-Yuhl Cho, and Jun-Keun Ji. "IP Voltage Controller of Three-phase PWM Converter for Power Supply of Communication System." Journal of the Korea Academia-Industrial cooperation Society 12, no. 6 (June 30, 2011): 2722–28. http://dx.doi.org/10.5762/kais.2011.12.6.2722.

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Xie, Shaofeng, Yiming Zhang, and Hui Wang. "A Novel Co-Phase Power Supply System for Electrified Railway Based on V Type Connection Traction Transformer." Energies 14, no. 4 (February 23, 2021): 1214. http://dx.doi.org/10.3390/en14041214.

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Power quality and neutral section are two technical problems that hinder the development of electrified railway to high-speed and heavy railway. The co-phase power supply technology is one of the best ways to solve these two technical problems. At present, a V type connection traction transformer is widely used in a power frequency single-phase AC traction power supply system, especially in high-speed railway. In this paper, a new type of co-phase power supply system for electrified railway based on V type connection traction transformer is proposed. One single-phase winding in the V type connection traction transformer is used as main power supply channel, and three ports are used as compensation ports. Neutral section is no longer set with traction substation, and the train is continuously powered through. The independent single-phase Static Var Generators (SVGs) are used to compensate the three-phase imbalance caused by single-phase traction load. When necessary, the power factor can be improved at the same time. The principle, structure, control strategy, and capacity configuration of the technical scheme are analyzed in this paper, and the effectiveness of the scheme is verified by using the measured data of electrified railway. The advantage of this scheme lies in the universal applicability of the V type connection traction transformer, and the flexibility of the SVG device.

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Zhang, Yong, Hui Teng, Tie Jun Ma, Hong Xia Xie, and Peng Wan. "3-Phase 4-Wire VIENNA Rectifier Used in the Resistance Spot Welding Inverter Power Supply." Applied Mechanics and Materials 432 (September 2013): 263–68. http://dx.doi.org/10.4028/www.scientific.net/amm.432.263.

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Considering the distortion factor, the large power resistance spot welding (RSW) inverter power supplys actual power factor (PF) is very low. In this paper, the 3-phase 4-wire three-phase/switch/level (VIENNA) rectifier is proposed to realize the power factors correction (PFC). Firstly, an equivalent load model of the back-stage in the RSW inverter power supply is established, thus the real load of this PFC circuit can be archived. Then, the 3-phase 4-wire VIENNA rectifier PFC circuit is analyzed with the simulation software of Pspice. Finally, an experimental circuit power of 3kW is designed. Experimental results show that the PF of this system can be increased to 98.6% that demonstrates the practicability of the 3-phase 4-wire VIENNA rectifier in RSW inverter power supply.

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Khaing, Tin Zar, and Lwin Za Kyin. "Control Analysis of Stand-Alone Wind Power Supply System with Three Phase PWM Voltage Source Inverter and Boost Converter." International Journal of Electrical and Computer Engineering (IJECE) 5, no. 4 (August 1, 2015): 798. http://dx.doi.org/10.11591/ijece.v5i4.pp798-809.

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Wind power supply system is an effective, environmentally friendly power source for household and other applications. According to the wind speed changes in variation the output power of wind generator is not stable and constant. This paper proposes the variable speed stand-alone wind power supply system that includes Permanent Magnet Synchronous Generator, three phase diode rectifier, DC-DC boost converter, battery energy storage system, and voltage source inverter. DC-DC boost converter controls to extract maximum power from the available wind power. Battery energy storage system through bidirectional converter is to supply the load when wind power is shortage. To get the desired output voltage and frequency at the load side, the voltage source inverter with the sinusoidal pulse width modulation (SPWM) control technique has chosen. The harmonics generated from the VSI are filtered with simple passive LC filters. Simulation results of output voltages and currents, the total harmonic distortion (THD) are presented using MATLAB/Simulink.

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Goggi Kirshna Sanyasi Rao and P.Murari. "Mitigation of Harmonics in Three - Phase Three - Wire System by using Fuzzy Logic Controlled Shunt Active Filters." November 2020 6, no. 11 (November 23, 2020): 87–91. http://dx.doi.org/10.46501/ijmtst061115.

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This paper shows the method of improving the power quality using shunt active power filter. In order to protect the supply system from current harmonics, we have to use the active power filters. These are used to compensate the reactive power compensation, but the performance of active power filters are based on various control strategies. This paper presents the complete examination to estimate the working of SHAF for generating the current references under steady and transient for balanced, unbalanced and non-sinusoidal conditions by using PI controller. The P-Q theory and synchronous reference frame theory, which are widely used in SHAF. The most validate results obtained by simulation with matlab/simulink software are carried out with PI controller for P-Q control theory for various voltage conditions like balanced, unbalanced and non-sinusoidal conditions and dynamic load changes.

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Yagup, V. G., and E. V. Yagup. "RESEARCH OF THE MODES OF FULL COMPENSATION OF REACTIVE POWER IN A THREE-PHASE POWER SUPPLY SYSTEM." Electrical Engineering & Electromechanics, no. 2 (April 16, 2019): 61–65. http://dx.doi.org/10.20998/2074-272x.2019.2.09.

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Bassoui, M., M. Ferfra, and M. Chraygane. "A New Validation Approach of a New Three-Phase High Voltage Power Supply for Microwaves Generators with one Magnetron by Phase." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 1 (February 1, 2016): 1. http://dx.doi.org/10.11591/ijece.v6i1.8305.

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In order to validating the new three-phase High voltage power supply for microwave generators with one magnetron by phase, this paper presents a new validation approach to evaluate the proposed model with several evaluations. This approach is based on the calculation and measurement of the performance and the power factor of this new three-phase power supply, also the study of the operation of this new system in case of failure. The design of this power supply is composed of new three-phase transformer with magnetic shunt, supplying by phase a voltage doubler cell composed of a capacitor and a diode. Each cell in turn, supplies a single magnetron. In this paper we have presented the new three-phase transformer by its equivalent model; it’s a π quadruple model composed of storable inductances able to translating the nonlinear saturation phenomena for stabilization of the magnetron current. The voltage and current curves obtained by simulation with MATLAB SIMULINK are in good conformity with those obtained by experimental of conventional power supply using a single phase transformer for one magnetron.<strong> </strong>The same curves will allow us to plot the instantaneous power absorbed by each magnetron. This leads to determine the average power emitted by each magnetron, and establish the balance of the power microwave generator by computing its performance which is compared to that obtained from experimental. After that we will compute the power factor of this power supply and we will study its operation in case of failure of one or two magnetrons.

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Bassoui, M., M. Ferfra, and M. Chraygane. "A New Validation Approach of a New Three-Phase High Voltage Power Supply for Microwaves Generators with one Magnetron by Phase." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 1 (February 1, 2016): 1. http://dx.doi.org/10.11591/ijece.v6i1.pp1-11.

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In order to validating the new three-phase High voltage power supply for microwave generators with one magnetron by phase, this paper presents a new validation approach to evaluate the proposed model with several evaluations. This approach is based on the calculation and measurement of the performance and the power factor of this new three-phase power supply, also the study of the operation of this new system in case of failure. The design of this power supply is composed of new three-phase transformer with magnetic shunt, supplying by phase a voltage doubler cell composed of a capacitor and a diode. Each cell in turn, supplies a single magnetron. In this paper we have presented the new three-phase transformer by its equivalent model; it’s a π quadruple model composed of storable inductances able to translating the nonlinear saturation phenomena for stabilization of the magnetron current. The voltage and current curves obtained by simulation with MATLAB SIMULINK are in good conformity with those obtained by experimental of conventional power supply using a single phase transformer for one magnetron.<strong> </strong>The same curves will allow us to plot the instantaneous power absorbed by each magnetron. This leads to determine the average power emitted by each magnetron, and establish the balance of the power microwave generator by computing its performance which is compared to that obtained from experimental. After that we will compute the power factor of this power supply and we will study its operation in case of failure of one or two magnetrons.

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He, Xiaoqiong, Aiping Guo, Xu Peng, Yingying Zhou, Zhanghai Shi, and Zeliang Shu. "A Traction Three-Phase to Single-Phase Cascade Converter Substation in an Advanced Traction Power Supply System." Energies 8, no. 9 (September 11, 2015): 9915–29. http://dx.doi.org/10.3390/en8099915.

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Cheng, Peng, Chao Wu, Huiwen Kong, Frede Blaabjerg, and Yu Quan. "Connection and Control Strategy of PV Converter Integrated into Railway Traction Power Supply System." Energies 13, no. 22 (November 16, 2020): 5989. http://dx.doi.org/10.3390/en13225989.

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In order to supply the single-phase locomotive load and mitigate the negative sequence current, this paper develops a V/V transformer-based connection and control strategy of three-phase photovoltaic (PV) converters integrated into railway traction power supply systems. In this V/V transformer-based connection, the two-phase traction voltage is converted into the three-phase voltage. This approach can offer a common low voltage AC bus, which is more convenient for more access to three-phase PV converters. Based on this V/V transformer-based connection, an individual phase current control strategy with the hybrid current reference is fully designed. In this control strategy, the current reference, containing two parts, is generated. One is the asymmetrical part for powering the single-phase locomotive load and mitigating the negative sequence current. The other is the symmetrical part for feeding the surplus power back to the utility grid. Then, each phase current replaces the dual-sequence current to be controlled to track the corresponding phase current reference. Consequently, PV converters can flexibly inject the symmetrical and asymmetrical currents without the dual-sequence extraction for a simpler implementation. Finally, the effectiveness of the developed connection and control strategy is validated by the simulation studies.

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Yin, Shu Jun, Xue Ren Li, and Ji Geng Luo. "Design of Electrostatic Precipitator Power System Based on Auto Disturbance Rejection Controller." Advanced Materials Research 846-847 (November 2013): 190–94. http://dx.doi.org/10.4028/www.scientific.net/amr.846-847.190.

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The paper designs a three-phase high voltage power supply system based on active disturbance rejection controller which make single-chip microcomputer ATmega128 as the main control chip and the system improve the stability and control precision of dust removing power. Engineering practice shows that, the DC power supply system has the advantages of convenient operation, high work efficiency, system stability.

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Cheng, Shu, Chang Liu, Jianxiang Tang, Tianjian Yu, and Kaidi Li. "Improvement of Quadruple Structure and Optimization of Control Algorithm for Co-Phase Traction Power Supply System." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 38, no. 5 (October 2020): 1112–21. http://dx.doi.org/10.1051/jnwpu/20203851112.

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Co-phase power supply is one of the key technologies to solve the technical bottlenecks such as electrical phase separation zone, poor power quality and defects in structure and control algorithms in traditional traction power supply systems and single co-phase power supply schemes, and an inevitable way to realize the development of electrified railways in the direction of safety, high speed and heavy load. Based on the single co-phase power supply technology, a novel quadruple co-phase power supply scheme with negative sequence elimination and to suppress reactive power and harmonic better for the two aspects of the system structure improvement and control algorithm optimization is proposed by combining the technologies of power system flexible transmission grid-connected and multiple inverters. Finally, the simulation model for the novel co-phase traction power supply system was designed and built, and the present method was verified by a set of simulation experiments so as to obtain the expected results.

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Cai, Bo. "Research on System Reconfiguration Technology of Distribution System Single-Phase-to-Earth Fault." Applied Mechanics and Materials 532 (February 2014): 603–10. http://dx.doi.org/10.4028/www.scientific.net/amm.532.603.

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Distribution network can operate with electricity for 1~2 hours after single-phase to-earth fault happening, so its network reconfiguration is different from not only reconfiguration in normal situation but also reconfiguration in fault situation and it should consider more factors. This paper puts forward a kind of improved branch exchange algorithm which all power supply restoring areas are divided into two groups: group A which are branch circuits on the same bus of fault line and group B which are power supply restoring lines on the different bus of fault line. For all power supply restoring lines of two groups, when voltage satisfies the constraint conditions, dispatcher prior chooses power supply restoring line which has minimum network loss value in group A in order to avoid outage during process of power supply restoring. Actual flied operation shows that this measure satisfies practical requirements.

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Kamarposhti, Mehrdad Ahmadi, and Ashkan Abyar Hosseini. "Modified approach for harmonic reduction in three-phase to seven-phase using transformer winding connections." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 3 (June 1, 2019): 1496. http://dx.doi.org/10.11591/ijece.v9i3.pp1496-1505.

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Three phase supply is available in the generating station or grid, were as seven phase supply is required for many industrial applications such as, aerospace, railway and automobile applications. There are different methods in which we can convert 3 to 7 phase using 24-Pulse Converter, Carrier Based PWM Technique, multilevel converter and Multiphase Transformer. The above said methods which are more complicated to design for higher ratings or a pure sine wave will not be obtained or harmonics will be more. For Multiphase power transmission system multiphase transformers are needed. In the multiphase power transmission and multiphase rectifier systems, the number of phase can be designed and developed in multiples of three. Therefore, the variable speed multiphase drive system considered in the literature are mostly of five, seven, nine, eleven, twelve, and fifteen phase. So, there is a need to design and develop special transformer which converts from 3 to 7 phase for different arrangement of input and output. Thus, with the proposed technique, a pure seven-phase sine-wave of fixed voltage/current and frequency is obtained, which can be used for RL load and motor testing purposes. Complete design and simulation of the proposed solution is presented. Analytical calculation and simulation results for RL load is presented in the paper. This model can be simulated by using Orcad simulation software and “SimPowerSystem” block sets of MATLAB/SIMULINK software.

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Journal articles on the topic 'Three-phase power supply system'

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