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Journal articles on the topic 'Generator Excitation System'

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Published: 5 June 2025
Last updated: 8 July 2025

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1

Wang, Guang Zheng, and Wen Xing Wang. "Research on Small Synchronous Generator Excited System Based on Fuzzy Control." Applied Mechanics and Materials 120 (October 2011): 524–27. http://dx.doi.org/10.4028/www.scientific.net/amm.120.524.

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This article describes the small synchronous generator excitation control device characteristics and working principle is proposed based on fuzzy control of excitation regulator device on-site test method. Phase compound excitations with voltage corrector by the way of magnetic amplifier were used in excitation devices. The generator terminal voltage, load current and power factor and other parameters were adjusted by fuzzy control through automatic control phase compound excitation transformer. For separate generator, the major factor of terminal voltage change was caused by the change of reactive current, in order to keep constant voltage generator excitation current mast be adjusted. At the end of the paper the problems and countermeasures in the course of debugging process were analyzed.
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2

Thida, Win, Yu Lwin Hnin, and Wah Aung Zin. "Static Excitation System of Generator in Hydropower Station." International Journal of Trend in Scientific Research and Development 3, no. 5 (2019): 1837–39. https://doi.org/10.5281/zenodo.3591590.

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Excitation system is one of the most important parts of the synchronous generators. Excitation system of the generator comprises from machines, devices and appliances that are intended to provide direct current to the generator field winding and this current regulation. For a constant frequency supply, the output voltage of the machine depends on the excitation current. In this paper, static excitation system of 10 MW synchronous generator in hydropower station is described and analyzed how the excitation current can be controlled to be stable terminal voltage and reactive power of generator. Thida Win | Hnin Yu Lwin | Zin Wah Aung "Static Excitation System of Generator in Hydropower Station" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd26742.pdf
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3

Zaleskis, Genadijs, Ivars Rankis, and Marcis Prieditis. "Self-Excitation System for Synchronous Generator." Electrical, Control and Communication Engineering 4, no. 1 (2013): 32–37. http://dx.doi.org/10.2478/ecce-2013-0019.

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Abstract Self-excitation for synchronous generator is described in the paper. The system is based on a buck converter input filter capacitor discharge through excitation winding of the generator. The buck converter is connected to the stator outputs through an uncontrollable diode rectifier, but excitation winding is used as a load. Input filter capacitor of the converter provides initial current pulse which magnetizes excitation system and produces the generator voltage increase, for this reason the capacitor is charged before self-excitation process starts. Results of the computer simulation and physical experiment are obtained and presented. These results show that the proposed self-excitation converter in conjunction with an input capacitor pre-charged from a low-power electronic generator actually magnetizes the generator excitation system therefore generator voltage and accordingly excitation current increases. Stabilization of generator output voltage occurs with a voltage surge, though its peak value slightly exceeds the reference one. The future investigation of the proposed self-excitation system may include definition of mathematical equations which describe transients in the generator’s self-excitation mode and development of control methods for purpose of self-excitation process control without voltage peaks. The computer model also should be improved.
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4

Chouaba, Seif Eddine, and Abdallah Barakat. "Controlled Brushless De-Excitation Structure for Synchronous Generators." Engineering, Technology & Applied Science Research 9, no. 3 (2019): 4218–24. https://doi.org/10.5281/zenodo.3249129.

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The main weakness of the brushless excitation system in a synchronous generator (SG) is the slow de-excitation response obtained during a load rejection. That is why voltage overshoots may be observed on the generator terminals. This behavior is mainly due to the exciter machine response time and the rotating diode bridge which is not able to quickly de-excite the generator by negative excitation voltages. This paper presents a new brushless de-excitation structure able to perform a quick de-excitation of the generator by providing controlled negative excitation voltage to the generator main field winding. The proposed structure is based on a new brushless de-excitation machine, called a control machine, and mounted on the same shaft of the generator and the brushless exciter. The brushless control machine is a low power one and used to transfer the orders from the voltage regulator to the discharge system located on the rotor side of the main generator. The dynamic performance of the proposed de-excitation system is evaluated in terms of system stability, voltage regulation response times and voltage overshoots during different load rejection tests. The proposed system is compared to the conventional brushless excitation system without the proposed de-excitation structure. In addition, a comparison is done with the static excitation system. The simulation tests are realized on an experimentally validated model of 11kVA synchronous generator developed in Matlab/Simulink.
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5

Pei, Wei, Geng Liang, Xuying Gao, and Xiangyu Feng. "Research on AC Excitation Regulation Control System for Synchronous Generators." Academic Journal of Science and Technology 6, no. 2 (2023): 31–34. http://dx.doi.org/10.54097/ajst.v6i2.9441.

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Although there are many methods for classifying the excitation systems of synchronous motors, there are three types of excitation systems for synchronous motors based on the numerous methods of providing excitation power to synchronous generators. One is a DC excitation system, the second is an AC excitation system, and the other is a static excitation system. This paper mainly studies the AC excitation system. The rotor speed of AC excited generators is variable and has excellent characteristics such as improving power system stability, allowing for deep operation without losing step. AC excitation generators not only have variable speed and constant frequency power, but also have independent adjustment functions for speed, reactive power, and effective power. The use of high-performance variable frequency excitation power supplies and appropriate excitation control methods can maximize the reliability, operational flexibility, and exceptional adjustment performance of AC excitation generators. The excitation system is an important part of synchronous generator operation. A good excitation system not only ensures the stable and reliable operation of the generator, but also greatly improves the stability of the motor and power system.
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6

Azis, Hastuti, Pawenary Pawenary, and Meyhart Torsna Bangkit Sitorus. "Simulasi Pemodelan Sistem Eksitasi Statis pada Generator Sinkron terhadap Perubahan Beban." Energi & Kelistrikan 11, no. 2 (2019): 46–54. http://dx.doi.org/10.33322/energi.v11i2.483.

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Excitation system is one of the most important parts of synchronous generators, where the system functions to provide dc power to the field generator coil. Iin this study, a static excitation system consisting of transformers and connected thyristors in bridge configuration has been implemented in synchronous machines that operate as 206,1 mva capacity generators, 16,5 kv using the help of matlab simulink r2017b software. By adjusting the load given to the generator, variations in excitation currents can affect the amount of output voltage generated by the generator so that it can increase and decrease the induced voltage. In full load conditions, namely p = 175 mw, q = 100 mvar, the results of the study show that when the simulation is run at alpha 0 °, it is known that the average value of dc voltage is 496,4 v, excitation current is 1057 a and voltage generator output has increased beyond its nominal voltage of 16,72 kv. in this case, to maintain the terminal voltage, the excitation current must be reduced by increasing the angle of shooting of the thyristor to an alpha angle of 45 °, so that the average dc voltage can be reduced to 479,3 v, as well as the excitation current to 985,9 a. the generator output voltage at the alpha 45 ° angle is obtained according to its nominal value of 1,.5 kv.
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7

Mato Mišković, Marija Mirošević, and Mateo Milković. "ANALYSIS OF SYNCHRONOUS GENERATOR ANGULAR STABILITY DEPENDING ON THE CHOICE OF THE EXCITATION SYSTEM." Journal of Energy - Energija 58, no. 4 (2022): 430–45. http://dx.doi.org/10.37798/2009584308.

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The paper elaborates on the mathematical model of the electric power system with several synchronous generators and in this model the generators are presented by a non-linear mathematical model. By applying such a model, the impact of the manner of supplying the excitation system on the generator’s angular stability was researched in the circumstances of occurrence of a short circuit in the network. The established model enables the analysis of the generator’s stability in the circumstances of extensive disruptions in the electric power system for the case of the generator with separate excitation and the generator with self-excitation. Research results can be useful when making the decision on the choice of the generator excitation type, when renewing the existing and building new generators.
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8

Ritonja, Jožef. "Adaptive stabilization for generator excitation system." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 30, no. 3 (2011): 1092–108. http://dx.doi.org/10.1108/03321641111111022.

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9

Sun, Wen, Yin Sheng Su, Jun Feng Zhang, and Xiao Ming Li. "Enhance Power System Transient Voltage Stability by Difference Coefficient of Generator Excitation System Optimization." Advanced Materials Research 1008-1009 (August 2014): 409–16. http://dx.doi.org/10.4028/www.scientific.net/amr.1008-1009.409.

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Lack of dynamic reactive power compensation result in power system transient voltage instability. To improve the transient voltage stability, an optimization strategy for setting the excitation system difference coefficient of the generator is presented in this paper. The concept of the excitation system difference coefficient is introduced. Then the impacts of difference coefficients of generator excitation system on generator stability are analyzed and adjustment range is proposed. The calculation results of Guangdong province system show that the transient voltage stability level is enhanced effectively after optimizing the excitation system difference coefficient.
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10

Sutjipto, Rachmat, Ika Noer Syamsiana, and Widya Pratiwi. "Analisis Pengaruh Pengaturan Sudut Penyalaan Thyristor Pada Tegangan Eksitasi Terhadap Keluaran Daya Reaktif Generator di PT.PJB PLTU Gresik Unit 3." ELPOSYS: Jurnal Sistem Kelistrikan 8, no. 3 (2021): 53–58. http://dx.doi.org/10.33795/elposys.v8i3.77.

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The process of changing mechanical energy into electrical energy is carried out by a synchronous generator using an excitation system that functions to supply a DC source to the generator field winding. In this study, the excitation system used is a static excitation system that uses a transformer and several thyristors connected in a bridge configuration. The excitation system is then implemented on a generator with a capacity of 200 MVA / 15 kV using the MATLAB Simulink R2017b simulation. By using the above circuit, the thyristor ignition angle setting can be adjusted so that it can adjust the excitation voltage and obtain the appropriate excitation current to maintain the stability of the generator output voltage. The simulation was carried out with variations in generator load and using 2 different types of excitation settings. The first setting is to set the thyristor ignition angle to 30° with t=10 ms, at this setting the generator can maintain a stable V out value with a voltage regulation limit of ±5% and the reactive power that can be generated by the generator is +50 MVAr and - 40 MVAr. When given a constant excitation at an angle of 35° with t=1 ms, the value of Vout exceeds the expected regulatory limit and the resulting reactive power limit is between +60 MVAr and -100 MVAR where the reactive power does not match the load requirements. This can have an impact on the interconnection system, namely when the reactive power of the generator is greater than the load requirement, the generator with a smaller reactive power will absorb reactive power in the interconnection system and can disrupt the stability of the interconnection network.
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11

Menzhinski, A. B., A. N. Malashin, and Yu V. Suhodolov. "DEVELOPING AND THE ANALYSIS OF MATHEMATICAL MODELS OF GENERATORS OF LINEAR AND RECIPROCATING TYPES WITH ELECTROMAGNETIC EXCITATION." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 61, no. 2 (2018): 118–28. http://dx.doi.org/10.21122/1029-7448-2018-61-2-118-128.

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The mathematical modeling of generators of linear and reciprocating types with electromagnetic excitation resulted in obtaining the equivalent electrical circuit and diagrams of magnetic circuit of generators as well as the expressions that describe the electromagnetic processes in generators of linear and reciprocating types with electromagnetic excitation is presented in the article. Mathematical models of generators of linear and reciprocating types with electromagnetic excitation take into account the geometrical parameters of the magnetic system of generators, effect of the armature reaction, the unequal distribution of the magnetic field in the magnetic system of the generators and the dependence of the scattering coefficient and the fringe effect (in linear generators) and buckling (in the reciprocating electric generators) on the coordinates of the movement. An evaluation of the effectiveness of the generators of linear and reciprocating types with electromagnetic excitation was performed that demonstrated that the efficiency of the reciprocating generator with electromagnetic excitation is limited to the amount of movement of the moving part of the generator that can be considered as a drawback of this type of generators. Therefore, the reciprocating generator with electromagnetic excitation is more effective to be used in a small value of the working stroke of the movable part of it or in conjunction with a linear generator as a compensator of the end effect in reciprocating motion. In the linear generator the rate of change of inductance and mutual inductance throughout the movement of the moving part is practically constant. So if an increase of the magnitude of the working stroke of the movable part takes place the benefits of the linear generator are undeniable. However, it should be noted that a reduction of the stroke magnitude of the movable part of the linear generator is limited by constructional dimensions of the magnetic system of the generator, which reduces its efficiency at low value of the working stroke of the movable part.
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12

Sučević, Nikola, and Sanja Lukić. "Influence of generator excitation system on generator under-impedance protection." Zbornik radova Elektrotehnicki institut Nikola Tesla 29, no. 29 (2019): 57–70. http://dx.doi.org/10.5937/zeint29-23935.

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13

Chouaba, S. E., and A. Barakat. "Controlled Brushless De-Excitation Structure for Synchronous Generators." Engineering, Technology & Applied Science Research 9, no. 3 (2019): 4218–24. http://dx.doi.org/10.48084/etasr.2768.

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The main weakness of the brushless excitation system in a synchronous generator (SG) is the slow de-excitation response obtained during a load rejection. That is why voltage overshoots may be observed on the generator terminals. This behavior is mainly due to the exciter machine response time and the rotating diode bridge which is not able to quickly de-excite the generator by negative excitation voltages. This paper presents a new brushless de-excitation structure able to perform a quick de-excitation of the generator by providing controlled negative excitation voltage to the generator main field winding. The proposed structure is based on a new brushless de-excitation machine, called a control machine, and mounted on the same shaft of the generator and the brushless exciter. The brushless control machine is a low power one and used to transfer the orders from the voltage regulator to the discharge system located on the rotor side of the main generator. The dynamic performance of the proposed de-excitation system is evaluated in terms of system stability, voltage regulation response times and voltage overshoots during different load rejection tests. The proposed system is compared to the conventional brushless excitation system without the proposed de-excitation structure. In addition, a comparison is done with the static excitation system. The simulation tests are realized on an experimentally validated model of 11kVA synchronous generator developed in Matlab/Simulink.
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14

Li, Zhi Min, Xin Yang Deng, Xiao Ming Mou, Shuang Rong, Tian Kui Sun, and Zi Nan Peng. "Decentralized Robust Coordinated Controller of Excitation and Valve for Improvement of Power System Stability." Applied Mechanics and Materials 668-669 (October 2014): 462–65. http://dx.doi.org/10.4028/www.scientific.net/amm.668-669.462.

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A novel robust control scheme for decentralized generator excitation and valve coordinated control systems to improve power system stability is proposed. By utilizing generator terminal voltage magnitude and phase angle to represent the interactions among generators, decentralized generator excitation and valve coordinated control in multi-machine power systems is achieved. The control is realized by robust parametric approach. Simulation results show that the proposed robust parametric coordinated control can improve power system stability.
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15

Yang, Pei Hong, Gui Mei Cui, and Wen Ying Liu. "Study on Improving Power System Damping Characteristic in Novel Excitation System." Advanced Materials Research 383-390 (November 2011): 2447–52. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.2447.

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A novel excitation system based on full controlled devices rectifier is proposed in this article, and the excitation system can provide double kinds of damping for power system by controlling the excitation voltage of DC side and exchanging reactive with generator. Through the Mat lab / Simu link simulation platform, a circuit model is established. This paper presents a current feed forward decoupling control method and the active and reactive current can be controlled independently by the method. The simulation results of two-area including four generators system shows the system damping ratio is improved significantly, and has better dynamic performance than conventional excitation system .
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16

Rozhkov, Vyacheslav V., Kirill K. Krutikov, Vladimir V. Fedotov, and Sergey G. Butrimov. "Dynamic simulation modeling of the excitation system of synchronous generators of stationary diesel generator sets for emergency power supply of a nuclear power plant." Journal Of Applied Informatics 18, no. 1 (2023): 82–95. http://dx.doi.org/10.37791/2687-0649-2023-18-1-82-95.

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In the article, using MatLab dynamic simulation modeling, a study was made of the excitation systems of powerful synchronous generators of stationary diesel generator sets, which are the main sources of emergency power supply for nuclear power plants. The optimal structural complexity mathematical model of a synchronous machine in relative units and orthogonal synchronous coordinate system is used. A comprehensive simulation of diesel generator sets was carried out with the reproduction of both the dynamics of the automatic control system for excitation of a synchronous generator and the diesel engine control system. The simulation takes into account the features of starting a diesel generator to accelerate a synchronous machine, its initial excitation from a battery. Particular emphasis is placed on the study of self-excitation modes through a transformer connected to the stator circuit of the generator and a thyristor rectifier with an excitation winding as a load, as well as parallel operation with the power system. As a result, the processes of starting a diesel generator set in idle mode, effective self-excitation, autonomous operation of the generator at idle, and applying a load to the generator up to the values of permissible overload were simulated. The work of all channels of the control system is shown, including the signals of the regulators of the automatic control system and mechanical variables that are inaccessible in practice. The adequacy of the developed model is proved by comparison with a real physical experiment when testing a diesel generator at a nuclear power plant. The possibility of using the model developed in MatLab as a virtual test site for testing a diesel generator set and a computer simulator for specialized engineering personnel of a nuclear power plant is demonstrated.
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17

NOHARA, SHIN'ICHI. "History of Excitation System Technology for Generator." Journal of the Institute of Electrical Engineers of Japan 120, no. 11 (2000): 697–700. http://dx.doi.org/10.1541/ieejjournal.120.697.

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18

Dang, Xunyi, Xiaoyu Yang, and Shengrui Yuan. "Synchronous generator fuzzy PID excitation control system." Journal of Physics: Conference Series 1650 (October 2020): 022046. http://dx.doi.org/10.1088/1742-6596/1650/2/022046.

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19

Jiang, Dawei, Xinyu Qian, Longbin Yu, et al. "Research on excitation system of synchronous generator." Journal of Physics: Conference Series 1607 (August 2020): 012040. http://dx.doi.org/10.1088/1742-6596/1607/1/012040.

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20

Liu, Haigang, Chu Sun, Mengyu He, Na Wang, and Yuanjun Zhou. "Analysis of Synchronous Generator Self-Excitation under Capacitive Load Condition in Variable-Frequency Aviation Power System." Machines 11, no. 1 (2022): 15. http://dx.doi.org/10.3390/machines11010015.

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As power electronic converters become more widely used in aviation power systems, the associated capacitive loads in the harmonic filter circuits increase accordingly. The risk of self-excitation of aeronautical synchronous generators due to capacitive loads is thus increased. Compared with the self-excitation of a generator in a conventional fixed-frequency power system, this process is more complicated in a variable-frequency aviation power supply (360–800 Hz), as both the varied frequency and the loading conditions contribute to the self-excitation. To quantify this effect, in our study, a series-parallel model of simplified RLC loads under a variable-frequency power supply was built. The criterion of generator self-excitation, given in terms of the generator impedance and the load impedance, was then derived. To facilitate the load configuration design in the case of an aviation power system, a comprehensive analysis of the influences of the varied load power and system frequency on the load impedance was conducted. A graphical approach was proposed to determine self-excitation by comparing the series load reactance and resistor with three critical impedances corresponding to three self-excitation criteria, which is more intuitive and enables one to visualize the tendency of self-excitation with varied frequencies and loading conditions more effectively. Finally, the influence of variable frequency on the self-excitation of the aeronautical synchronous generator was verified by the simulation results.
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21

Mina, Irwan Anto, and Mokh Sidqi Fahmi. "SUPPLAY EKSITASI OUTPUT GENERATOR 300 MW MENGGUNAKAN METODE POLA TITIK DAYA REAKTIF." Journal of Mechanical Engineering and Mechatronics 5, no. 1 (2020): 11. http://dx.doi.org/10.33021/jmem.v5i1.983.

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<p>Excitation system is a system that conducts electric current in the same direction as a generator in a power plant, so that it produces electricity and a large voltage on the increase in the excitation current. In modern regulatory systems, excitation plays an important role in controlling the stability of a development because it involves load fluctuations, so excitation as a controller will require control of the generator output such as voltage, current and power factors in a necessary manner. If the excitation current rises, the reactive power supplied by the system generator will increase otherwise if the reactive power supplied will decrease. If the given excitation current is too small, the reactive power flow will move from the system to the generator so that the generator absorbs the reactive power from the system. This situation is very dangerous because it will cause excessive savings on the stator.</p><p><strong>Keywords</strong>:<em> G</em>enerator, excitation system, transformer, rectifier.</p>
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22

Kutsyk, А. S. "The Semiconductor Self-Excitation System of Synchronous Generator with Fuzzy Voltage Controller." Science and innovation 10, no. 3 (2014): 5–15. http://dx.doi.org/10.15407/scine10.03.005.

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23

Teng, Yu Fei, Li Jie Ding, and Hua Zhang. "Dynamic Process of Generator Self-Excitation Considering the Load in Power Grid." Advanced Materials Research 732-733 (August 2013): 835–40. http://dx.doi.org/10.4028/www.scientific.net/amr.732-733.835.

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The dynamic process analysis of the generator self-excitation was proposed in this paper, considering the effect of the active power load in the isolated system. Firstly, generator self-excitation generation mechanism was introduced in this paper. Then, with a simple analysis system, two situations, which include the undercompensation system and the over compensation system, are discussed to analyze the dynamic process of the generator self-excitation phenomenon. Analysis results show that when there is the active power load in the isolated power system, the rotate speed of the generator in this system can be limited after the load rejection faults occurrence in system. Therefore, the overvoltage of the system caused by self-excitation can be limited obviously. Hence, the equipment in the system can be protected.
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24

Sumina, Damir, Neven Bulić, and Mato Mišković. "Application of a DSP-Based Control System in a Course in Synchronous Machines and Excitation Systems." International Journal of Electrical Engineering & Education 49, no. 3 (2012): 334–48. http://dx.doi.org/10.7227/ijeee.49.3.12.

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The paper presents educational tools for students of an undergraduate course in synchronous generators and excitation systems. Laboratory exercises are based on the work with a laboratory model which consists of a digital control system and a synchronous generator connected to the power network. The code development is supported by two software tools where the code can be developed in the C or C++ programming language or in a graphical environment. In the Electrical Machines Laboratory, the presented laboratory model allows students to develop the code for excitation control, to learn how a conventional excitation control structure and various types of power system stabilisers function, to carry out experiments with a step change in the active power reference or voltage reference, and to record generator responses. The proposed approach offers students the opportunity to apply the knowledge they have acquired in lectures through practical work in the laboratory.
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25

Krištof, Vladimír, and Marián Mešter. "Loss of excitation of synchronous generator." Journal of Electrical Engineering 68, no. 1 (2017): 54–60. http://dx.doi.org/10.1515/jee-2017-0007.

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Abstract This paper presents results of study of loss-of-excitation phenomena simulations. Loss of excitation is a very common fault in synchronous machine operating and can be caused by short circuit of the field winding, unexpected field breaker open or loss-of-excitation relay mal-operation. According to the statistic [1], the generator failure due to loss-of-excitation accounts for 69% of all generator failures. There has been concern over possible incorrect operation of the relay when operating the generator in the under-excited region, during stable transient swings and during major system disturbances. This article can serve as inputs for system operators in preparation of operation area or protection relaying area.
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Manikandan, S., and Priyanka Kokil. "A Discrete Delay N-decomposition Approach for Delay-Dependent Stability of Generator Excitation Control System with Constant Communication Delays." IAES International Journal of Robotics and Automation (IJRA) 6, no. 4 (2017): 234. http://dx.doi.org/10.11591/ijra.v6i4.pp234-240.

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<p>This paper deals with problem of delay in stability analysis of network controlled generator excitation system. Delays exist in communication channel in network based control between system and controller. A discrete delay N-decomposition is used to compute delay margin for generator excitation system with constant delay which is easier when compared to analytical method. A Lyapunov krasovskii function is constructed for given time delay generator excitation system and linear matrix inequalities techniques are used. Generator excitation system is employed with proportional integral controller, delay margin calculated for various values of gain of proportional integral controller. Theoretically obtained results are verified using simulation studies.</p>
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27

Kutsyk, Andriy, Mykola Semeniuk, Mariusz Korkosz, and Grzegorz Podskarbi. "Diagnosis of the Static Excitation Systems of Synchronous Generators with the Use of Hardware-In-the-Loop Technologies." Energies 14, no. 21 (2021): 6937. http://dx.doi.org/10.3390/en14216937.

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In this paper, testing and diagnosis methods for the static excitation systems of power plant synchronous generators using Hardware-In-the-Loop technology are described. These methods allow a physical excitation system to be connected to a real-time model of a power plant unit. A feature of a static excitation system is the presence of generator self-excitation—that is, when the input voltages of the excitation system are defined by a synchronous generator. These voltages are determining by the digital model, which creates additional difficulties with combining a digital model with a real excitation system. Various ways to solve this problem are described in this article; in particular, we focus on the option in which the gate-impulses of a thyristor converter are applied to the digital model by a real static excitation system. The real-time models are based on the method of average voltages in the integration step. This method is effective for providing numerical stability for the models of power schemes and their functioning in real time mode over a long period. A synchronization method for the calculation time of the model with real time is described. The adequacy of the described method is proved by the results of the static excitation system of synchronous generators testing in operating and fault modes.
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28

Ohn, Mar Myaing, and Mu Han Thwe. "Design and Construction of Pic-Based Excitation Control System for Generator." Applied Mechanics and Materials 110-116 (October 2011): 2469–74. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.2469.

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The main objective of this PIC-based excitation control system is to control the terminal voltage by adjusting the generator exciter voltage. Unlike the conventional control system, the PIC-based excitation control system is constructed to reduce the number of components and thus the amount of design work and wiring required for the system. As a consequence, this is constructed to be low cost and high performance. In this work, this design is based on the construction of switched mode power supply (SMPS). MOSFET IRF840 is used as switching element to control the field excitation through the field coil. PIC16F628 microcontroller is used as excitation controller and performs the modulator function in firmware. In this modulator function, Pulse Skipping Modulation (PSM) which generates train of pulses to turn IRF840 (switching device) on/off in order to reach the desired output voltage of the generator is used. In the PIC-based excitation control system, PIC microcontroller senses the feedback voltage and compares this voltage with reference voltage by using onboard reference and two comparators. In this control system, PIC microcontroller generates a train of pulses to turn MOSFET (IRF840) on/off to control the field excitation of the generator. This excitation control system provides 10% voltage regulation from no load and provides the continuous maximum current up to 8A at maximum rating of 32, 63, 125 and 250 Vdc.
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29

Yuan, Xiaofang, Yaonan Wang, and Lianghong Wu. "Composite feedforward-feedback controller for generator excitation system." Nonlinear Dynamics 54, no. 4 (2008): 355–64. http://dx.doi.org/10.1007/s11071-008-9334-6.

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30

Kuzmenko-, Andrey, and Aleksandr Sinitsin-. "Robust nonlinear synchronous generator excitation system: integral adaptation." Вестник Донского государственного технического университета 14, no. 1 (2014): 154–61. http://dx.doi.org/10.12737/3514.

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31

Hamdan Rizal Maulana, Agus Suandi, and Helmizar. "PENGARUH PEMBEBANAN TERHADAP ARUS EKSITASI PADA GENERATOR." Rekayasa Mekanika 6, no. 2 (2022): 63–70. http://dx.doi.org/10.33369/rekayasamekanika.v6i2.25458.

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The generator in the hydropower system is used to convert mechanical energy originating from the turbine rotation into electrical energy by producing an electromotive force. Excitation is one of the most crucial parts of the Generator system, where excitation plays a role in forming/producing electromagnetic flux, resulting in an induced emf. The amplifying current is used to adjust the magnitude of the output voltage according to the applied load. The tool used to regulate the excitation current is the Automatic Voltage Regulator (AVR). The differential loading on the generator changes every time. Therefore a power plant must be able to generate electricity in accordance with the magnitude of the changing load. In power generation, these loading fluctuations can be overcome by adjusting the water valve opening and the excitation current flowing to the electromagnet coil on the generator rotor with constant rotor rotation by the AVR so that electric power is generated according to the applied load. The purpose of this study is to analyze the effect of the load on the excitation current. The results obtained are the load has an effect on the excitation current.
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32

Al-Zahrani‬‏, Abdulmohsen, and Sreerama Kumar Ramdas. "Performance Evaluation of Excitation Systems in Stability Enhancement of Power Systems." European Journal of Engineering and Technology Research 7, no. 5 (2022): 82–93. http://dx.doi.org/10.24018/ejeng.2022.7.5.2820.

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This paper involves the characterization and the performance evaluation of various types of synchronous generator excitation systems in the transient stability enhancement of power systems. The Investigations are carried out by modelling the typical DC, AC and static excitation systems represented by IEEE types DC1A, DC2A, AC4A, AC5A, ST1A and ST2A attached with a generator connected to the infinite bus. The performance evaluation of these excitation systems is performed in terms of their response ratio and ceiling voltage together with the system settling time and the critical clearing time following a sudden three-phase short-circuit in the system. Each excitation system together with its power system stabilizer is considered in the analysis. 4th order Runge Kutta method is utilized for transient stability analysis of the power system with the 3rd order model for synchronous generator representation. The investigations reveal that the IEEE ST2A Excitation System is better than the other types of excitation systems.
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33

Wang, Shuyang, Qiu Xia, Xingguo Wang, Yarong Guo, Zhengguang Chen, and Dingxiang Du. "Modelling& Simulation and Protection& Control Verification Method for Asynchronous Motor-Synchronous Generator Sets." E3S Web of Conferences 185 (2020): 01033. http://dx.doi.org/10.1051/e3sconf/202018501033.

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Power supply system made of asynchronous motor-synchronous generator sets (M-G sets) is often used as power supply for important loads. The system usually consists of two M-G sets. Unlike synchronous generators connecting to large power grid, the two generators in the system can have significant effect on the other when field loss fault occurs. If the protection settings are inappropriate, the two generators may trip one after another during a fault on a single generator, causing the important load losing all the power supply. This paper proposed a simulation and protection verification method based on the RTDS digital modelling for M- G sets including detailed excitation system. The modelling and simulation methods can effectively verify the reasonability of settings of the P-Q restriction of the excitation regulator and the PID controllers, and provide the important basis for the setting of over-current protection and loss of excitation protection, ensuring the safe operation of the power supply system made of M-G sets.
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34

Han, Zhi Ling. "Reform of Excitation System on the Domestic 600MW Subcritical Turbine Generator Unit." Advanced Materials Research 986-987 (July 2014): 1837–41. http://dx.doi.org/10.4028/www.scientific.net/amr.986-987.1837.

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Analog Excitation regulation system is applied in No.3 turbine generator unit of Harbin No.3 power plant, Huadian Energy Group, and the system has several problems such as high failure rate, poor regulating performance and low level automation. As a solution, the static self-shunt excitation system is used to replace the analog excitation regulation system, UNITROL 5000 all-digital excitation system is adopted. With specific field situation, the paper introduces the structure and application of the system in details. Compared with the conventional A.C. exciting system, the all-digital excitation system has effectively improved the stability and reliability of the generator, with the advantages of more flexibility of the start-up modes and undisturbed switching. It is also reliable and convenient for the switching of PSS additional regulation unit.
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35

Lv, Yanling, Yuting Gao, Jian Zhang, Chenmin Deng, and Shiqiang Hou. "Symmetrical Loss of Excitation Fault Diagnosis in an Asynchronized High-Voltage Generator." Energies 11, no. 11 (2018): 3054. http://dx.doi.org/10.3390/en11113054.

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As a new type of generator, an asynchronized high-voltage generator has the characteristics of an asynchronous generator and high voltage generator. The effect of the loss of an excitation fault for an asynchronized high-voltage generator and its fault diagnosis technique are still in the research stage. Firstly, a finite element model of the asynchronized high-voltage generator considering the field-circuit-movement coupling is established. Secondly, the three phase short-circuit loss of excitation fault, three phase open-circuit loss of excitation fault, and three phase short-circuit fault on the stator side are analyzed by the simulation method that is applied abroad at present. The fault phenomenon under the stator three phase short-circuit fault is similar to that under the three phase short-circuit loss of excitation. Then, a symmetrical loss of the excitation fault diagnosis system based on wavelet packet analysis and the Back Propagation neural network (BP neural network) is established. At last, we confirm that this system can eliminate the interference of the stator three phase short-circuit fault, accurately diagnose the symmetrical loss of the excitation fault, and judge the type of symmetrical loss of the excitation fault. It saves time to find the fault cause and improves the stability of system operation.
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36

Wei, Bei, Xiu He Wang, and Hui Zhong. "The Development of a New Full-Wave Induced Excitation Synchronous Generator." Advanced Materials Research 614-615 (December 2012): 1240–43. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.1240.

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This paper presents the development of a new induced excitation system in the synchronous generator. The induced excitation system is a relatively new type of brushless and exciterless machine, which offers an excellent balance between cost, reliability, power density, and high-speed capability. Aiming at the low efficiency problem of the construction of excitation system, this paper presents an improved construction method for excitation system. The result showed that it has superiority in effect.
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Yao, Benchun, Zhen Tian, Xu Zhan, Changyun Li, and Hualong Yu. "Study on Rotor-Bearing System Vibration of Downhole Turbine Generator under Drill-String Excitation." Energies 17, no. 5 (2024): 1176. http://dx.doi.org/10.3390/en17051176.

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Downhole turbine generators (DHTG) installed within drill-string are susceptible to internal and external excitation during the drilling process, causing significant dynamic loads on bearings, and thereby reducing the bearing’s service life. In this study, a finite element model of an unbalanced rotor-bearing system (RBS) of DHTG with multi-frequency excitations, based on the Lagrangian motion differential equation, is established. The responses of the RBS under different drill-string excitations in terms of time-domain response, whirl orbit, and spectrum are analyzed. For a constant rotor speed, lateral harmonic translational and lateral oscillation both transform the whirl orbit to quasi-periodic, while axial rotation only changes the response amplitude. Changing the duration of pulse excitation leads to different response forms. Then, the dynamic characteristics of the RBS supported by a squeeze film damper (SFD) are investigated. The results indicate that SFD effectively reduces the displacement response amplitude and bearing force near the critical speed. As the axial rotation angular velocity of the drill-string increases, the first critical speed and displacement response decrease, while the variation of lateral oscillation frequency and amplitude has limited impact on them. The established model provides a means for analyzing the dynamic characteristics of DHTG’s RBS under drill-string excitations during the design stage.
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38

Traparić, Mirko, and Zoran Miljanić. "Reconstruction of the hydro generator excitation system on hydro power plant Trebinje 1." Tehnika 77, no. 6 (2022): 723–27. http://dx.doi.org/10.5937/tehnika2206723t.

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The excitation system of the hydro unit is a static self-excitation system that uses thyristor rectifiers in a three-phase fully controllable bridge connection with a digital two-channel regulation system characterized by a very fast response (eng. high initial response ratio). The excitation system is powered by an excitation transformer connected to the busbars of the aggregate with a transmission ratio of 14.4/0.42 kV. The aim of this project is to show the characteristics of the old ABB UNITROL 5000 excitation system as well as the improvements obtained by installing the new ABB UNITROL 6000 excitation system of unit 1 at the Trebinje Hydroelectric Power Plant 1. The reconstruction of the excitation system was carried out as part of the regular annual overhaul of the hydroelectric power plant by representatives of the company "Advensys engineering" d.o.o. - Zagreb, through cooperation with the staff of the power plant. The basic scope of the system reconstruction consists of three units and includes the replacement of the control part of the excitation, the replacement of the excitation switch and the replacement of the excitation control panel.
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Goh, Hui Hwang, Sy yi Sim, Mohd Nasri Abd Samat, et al. "Loss Of Excitation (LOE) Protection of Synchronous Generator." Indonesian Journal of Electrical Engineering and Computer Science 8, no. 1 (2017): 230. http://dx.doi.org/10.11591/ijeecs.v8.i1.pp230-236.

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<p>Synchronous generators require certain protection against loss of excitation because it can lead to harmful effect to a generator and main grid. Systems of powers are evolving with applications of new techniques to increase reliability and security, at the meantime techniques upgradation is being existed to save financial cost of a different component of power system, which affect protection ways this report discuss the way of loss of excitation protection scheme for an increase in a synchronous generator. It is obvious that when direct axis synchronous reactance has a high value, the coordination among loss of excitation protection and excitation control is not effective. This lead to restricting absorption capability of the reactive power generator. This report also reviews the suitable philosophy for setting the limiters of excitation and discusses its effect on loss of excitation protection and system performance. A protection scheme is developed to allow for utilization of machine capability and power swing blocking is developed to increase the reliability when power swing is stable.</p><p><em> </em></p>
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40

Wang, Rongjie, Xiangyu Liu, and Yuyuan Huang. "Synchronous Generator Excitation System for a Ship Based on Active Disturbance Rejection Control." Mathematical Problems in Engineering 2021 (April 27, 2021): 1–17. http://dx.doi.org/10.1155/2021/6638370.

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To solve synchronous generator oscillations in marine power systems which cannot be effectively suppressed, according to the nonlinearity and time variability of the ship power system, a method of synchronous generator excitation control for a ship based on active disturbance rejection control (ADRC) is proposed. Under different working conditions, three methods are automatic voltage regulator (AVR), automatic voltage regulator with power system stabilizer (PSS), and ADRC methods, which are applied to the two-generator parallel-running excitation system of a ship in simulations. The simulation results show that the excitation control system based on ADRC is faster and has better anti-interference ability and has a better restraining effect on synchronous generator oscillation.
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41

KOPTYAEV, Evgeniy N., and Mark L. IVLEV. "A Brushless Adjustable Excitation Generator." Elektrichestvo, no. 2 (2022): 65–71. http://dx.doi.org/10.24160/0013-5380-2022-2-65-71.

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Wind turbines are further developed toward improving their reliability and efficiency, and reducing maintenance costs during long-term operation. For this purpose, synchronous generators with excitation from permanent magnets are used, the parameters of which determine in many respects the efficiency and dimensions of the power plant as a whole. The article proposes a new design of a brushless synchronous generator with excitation longitudinal with respect to the rotor rotation axis. The generator features a simple design of its rotor poles and double frequency of the secondary winding voltage. The possibility of manufacturing the stator housing from cheap plastic or similar non-magnetic materials is noted, due to which a reduction in the generator mass and cost can be achieved; such generator can find use mainly in small and medium capacity power plants. To close the rotor excitation magnetic flux, longitudinal magnetic cores with coils on them are installed in the slots of the non-magnetic stator housing. This makes it possible to improve heat removal from the secondary winding and simplify the assembly. Smooth adjustment of the output voltage in a wide range of rotation speeds is possible. The results of modeling the magnetic field in the air gap between the stator and rotor and the output voltage waveform for the basic magnetic system configuration are presented.
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42

Daunghom, Kitsanapol, and Suttichai Premrudeepreechacharn. "Potential Evaluation of Hybrid Wind-Diesel System Island Area in Thailand." Applied Mechanics and Materials 781 (August 2015): 341–45. http://dx.doi.org/10.4028/www.scientific.net/amm.781.341.

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Some communities in Thailand located on Island with high wind velocities but an unreliable utility supply, will typically install diesel powered generators and wind generators to form a microgrid. Microgrid projects have been developed in many parts of the world, and commercial solutions have started to appear. Such systems face specific design issues, especially when the wind penetration is high enough to affect the operation of the diesel plant. The dynamic behavior of a medium penetration hybrid microgrid is investigated. It consists of a diesel generator set, a wind power generator and several loads. The diesel engine drives a 3x2,000 kW synchronous generator with excitation control. The wind turbine drives a 6x800 kW (full power converter) synchronous generator. The total load of the microgrid is about 4 MW which varies during the day. The excitation controller and speed controller for the diesel’s synchronous generator are designed, as well as the power control of the wind turbine. The system is modeled and simulated using software DIgSILENT PowerFactory. The study evaluates how the power generation is shared between the diesel generator set and the wind generator, the voltage regulation during load connections, and discusses the need of battery energy storage, the system ride-through-fault capability and frequency control. The results of several case studies are presented. The results have shown that the systems are stable under various ratio of PWIND / PLOAD from 10% to 100%, except ratio of PWIND / PLOAD from 110%.
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43

Livio Šušnjić. "BRUSHLESS EXCITATION SYSTEM ELECTROMAGNETIC DESIGN AND ANALYSES." Journal of Energy - Energija 58, no. 5 (2022): 550–63. http://dx.doi.org/10.37798/2009585313.

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The brushless synchronous generator (SG) excitation system consists of a main exciter, a permanent magnet generator (PMG) of consequent rotor poles type, and an automatic voltage regulator (AVR). Both exciter machines have been properly designed and analysed. The machines performances are obtained by time stepping finite-element method (FEM) coupled with the external electrical circuit. An experimental machine is built and the measured results are given.
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44

Paun, Rusalin Lucian, Gilbert-Rainer Gillich, and Marius Condratiuc. "High-power system for acoustic excitation of plates." Studia Universitatis Babeș-Bolyai Engineering 68, Special Issue (2023): 39–46. http://dx.doi.org/10.24193/subbeng.2023.spiss.4.

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"This paper introduces a device dedicated to acoustic excitation for modal analysis of plates. A particular setup is requested since the system should produce acoustic excitation with high power in the 10…120 Hz frequency range. The system comprises a signal generator, an amplifier powered by a car starter or a battery, and a subwoofer. This system permits setting the generated frequency around the resonance frequency with reasonable frequency and amplitude stability. We present the system’s design and test its performance on a rectangular plate. In our laboratory experiments, we achieved the desired structural behavior. Keywords: modal analysis, acoustic excitation, subwoofer, frequency estimation."
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45

Kurilkin, Dmitry. "Definition of Energy Expenses on Traction Generator Excitation According to Data of Microprocessor Control Systems for Locomotive Traction Characteristic Prediction." Bulletin of scientific research results, no. 1 (March 30, 2022): 103–17. http://dx.doi.org/10.20295/2223-9987-2022-1-103-117.

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Purpose: Development and approbation of the methodology of definition of energy expenses on excitation of traction generator of diesel locomotive on the stage of locomotive traction characteristic prediction. While definition of diesel power spent on traction generator excitation during prediction of traction-energy characteristics of diesel locomotive it’s necessary to consider current technical state of an exciter and traction synchronous generator. This task can be solved as a result of statistical analysis of information being registered by subsystem of board diagnostics of contemporary diesel locomotives. Methods: It’s used in the work the methods of preprocessor handling of information volume and statistical analysis of formed sampling. Results: There have been obtained the dependences allowing to predict with high precision the expenses of power for traction generator excitation in various work modes of diesel locomotive on the basis of preliminary analysis of data of board diagnostics subsystem. The necessity of such analysis is preconditioned by large scatter of parameters of magnetic system of traction synchronous generators and, hence, power values spent on their excitation which reaches 100% for generators 2TE116U at 40 kW power. Practical significance: The obtained results help to rise definition accuracy of traction-energy properties for particular locomotive.
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Tan, Li Xin, Zhi Hui Deng, Wen Bin Chu, and Xue Dong Li. "Simulation and Analysis of Excitation System Accessorial Controlled by Two Input PSS." Advanced Materials Research 271-273 (July 2011): 955–60. http://dx.doi.org/10.4028/www.scientific.net/amr.271-273.955.

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Founded two input PSS model,by making analysis the theory of Synchro- generator. Use New PSS model to be as a accessorial controlling of Excitation system of Synchro-generator. Founded and simulated the Excitation system including this New PSS in the transient condition based on MATLAB/SIMULINK. Compared the result of simulation, it indicated that the excitation system accessorial controlled by this PSS has nicer roubustness, increased Damp trait of the system,restraining the interference, low frequency oscillation and recover of short cut than the excitation system controlled by PID meth.
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47

Kotin, D. A., and I. А. Ivanov. "Using of a single-phase synchronous multi-winding generator with permanent magnets for the power supply of an autonomous consumer." Power engineering: research, equipment, technology 24, no. 1 (2022): 29–38. http://dx.doi.org/10.30724/1998-9903-2022-24-1-29-38.

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THE PURPOSE. Consider the existing ways of using electromechanical converters for power supply of an autonomous consumer. Conduct a comparative analysis of electromechanical converters, scenarios and conditions for their use in the power supply of an autonomous consumer. To develop a proposal to eliminate the shortcomings in existing models of synchronous generators in order to increase their controllability. To develop a mathematical description of a synchronous generator with magnetoelectric excitation from permanent magnets of a single-phase type with a simplified design as a universal example of the functioning of the entire proposed line of synchronous generators. Carry out mathematical modeling of the generator proposed for consideration in order to confirm the proposed method of regulating the generated parameters, such as current and voltage, without the need to change the generator shaft rotation speed.METHODS. When solving the problem, the method of describing an electric machine in a dq-coordinate system using a multi-winding description of the machine was used; to confirm the proposed control method, mathematical modeling with the SimInTech environment was used.RESULTS. The article describes the relevance of the topic, considers the features of the operation of various electromechanical converters for power supply of an autonomous consumer, indicates the conditions for the use of one type or another of the architects of the power supply system in conjunction with electromechanical converters. A line of synchronous generators with magnetoelectric excitation is proposed in order to improve their controllability, namely, the ability to regulate the output generated parameters.CONCLUSION. Using of the proposed synchronous generators with excitation from permanent magnets will allow for additional regulation of the generated parameters, thereby allowing either completely or partially to exclude additional semiconductor converting equipment, thereby reducing losses during the conversion of electrical energy. Moreover, it is possible to regulate the generated current and voltage discretely by two times increasing one of these values, this method of regulation depends on the design of the generator.
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48

Bashirov, B. "PERMANENT MAGNET SYNCHRONOUS MOTOR." Scientific heritage, no. 93 (July 22, 2022): 94–98. https://doi.org/10.5281/zenodo.6882633.

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Synchronous machine (CM) is an alternating current electric machine whose rotor speed is directed in the same direction as the speed of the electromagnetic field. In a synchronous generator with permanent magnets on the rotor, there is no excitation winding, and the magnetic flux of excitation is created due to permanent magnets, not coils. The aim of the study is to design a synchronous generator with permanent magnets in an autonomous power supply system.
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49

Vučićević, Darko, Danilo Buha, Savo Marinković, Saša Gligorov, and Nevena Malešević. "Coordination between relay protection functions and excitation system with generator capability curve." Zbornik radova Elektrotehnicki institut Nikola Tesla 31, no. 31 (2021): 167–81. http://dx.doi.org/10.5937/zeint31-35025.

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It is common practice for relay protection and excitation systems to be adjusted independently. That practice leads to the uncoordinated operation of some protective functions. This article presents the tuning of some important protection functions. The first step is loss of excitation protection adjusting and its coordination with the minimum excitation limiting function. Analyzing the coordination settings of this protection with the minimum excitation limiter in practice, it is often noticed that these functions are inadequately adjusted, so the capacitive part of the generator capability curve is not optimally used. That is in contradiction with the high need for capacitive reactive power in the transmission system. The second step refers to the coordination of the maximum stator current limiter in the excitation system with stator overload protection, overcurrent protection, and permitted generator stator overload. It is noted here that this coordination is often not adequately adjusted, leading to the following irregularities: -malfunction of the automatic voltage regulator in certain operating situations, which can lead to voltage collapse in the transmission system; -in some operating situations, there is no forcing of excitation current when it is most needed to preserve system stability.
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50

Damij, Raad Lafta. "Development of mechanical coupling and exciter system in synchronous generators." Eastern-European Journal of Enterprise Technologies 6, no. 8 (114) (2021): 34–40. http://dx.doi.org/10.15587/1729-4061.2021.246619.

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Power is generated in a variety of ways, including renewable energy, nuclear power, and burning of fossil fuels. The majority of our power is currently generated by burning fossil fuels, mostly natural gas and coal, to spin turbines attached to an electromagnetic generator. The main advantage of AC generation is that the voltage levels can be altered up and down with transformers, allowing electricity to be sent across long distances to the loads that demand it. The excitation system demand for large synchronous generators with a few hundred-megawatt ratings becomes very enormous. The challenge of transmitting such a big amount of power through high-speed sliding contacts becomes daunting. Mechanical coupling with exciter for synchronous generators is essential to mitigate such problems as the corrected output is linked directly to the field winding. This paper aims to develop a simulation of a 3-phase diesel engine-based 2 MVA/400 V synchronous generator with mechanical coupling and an exciter system. The developed simulation of the synchronous machine is set to deliver 25 % of its rating value (500 kW) till the time of 3 sec. Then, additional power of 1 MW is switched at t=3 sec via a 3-phase circuit breaker. The dynamic response of field current and field voltage of the simulation shows reasonable step performance as the steady-state time is less than 3 sec. The control of the excitation system allows the generator to maintain voltage, control reactive power flow, and assist in maintaining power system stability. The simulation was accurate when measuring the voltage and current under these changes. This analysis can help to investigate further integration with renewable energy sources.
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