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Journal articles on the topic 'Voltage proﬁle'

Author: Grafiati

Published: 11 December 2022

Last updated: 31 July 2025

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1

Mohammed, Haruna, and M. N. Nwohu. "Comparative Analysis of DG Units with Shunt Capacitive Banks on the Improvement of Voltage Profiles in Distribution Networks." International Journal of Research and Innovation in Applied Science IX, no. III (2024): 238–46. http://dx.doi.org/10.51584/ijrias.2024.90323.

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Electrical distribution systems’ reliability is a critical parameter for electrical networks and their end-users. Among the different parameters associated with these systems’ reliability, voltage proﬁle is most commonly affected in the electrical network due to different internal and external parameters such as lines and feeders’ impedance, system overloads, and increments on end-users. A poor voltage profile can have adverse impacts on the end user, such as long-term harm to their electric and electronic devices. For both consumers and companies that provide electricity, a low voltage profil

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2

Serra, Federico M., and Cristian H. De Angelo. "Control of a battery charger for electric vehicles with unity power factor." Transactions on Energy Systems and Engineering Applications 2, no. 1 (2021): 32–44. http://dx.doi.org/10.32397/tesea.vol2.n1.3.

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A nonlinear controller for an electric vehicle battery charger is proposed in this work. The controller allows charging the battery bank with constant current and constant voltage charging proﬁle, while ensuring unity power factor and low distortion in the grid current. A single model is made for the complete system and the controller is designed using interconnection and damping assignment. The proposed controller ensures the closed-loop stability and allows decoupling the system avoiding disturbances in the electric grid and battery bank. The proposal is validated with simulation results.

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3

Shaoxiong Hua and Gang Qu. "Voltage setup problem for embedded systems with multiple voltages." IEEE Transactions on Very Large Scale Integration (VLSI) Systems 13, no. 7 (2005): 869–72. http://dx.doi.org/10.1109/tvlsi.2005.850122.

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4

Beriber, D., A. Talha, and M. Boucherit. "Stabilization of multi DC bus link voltages of multilevel NPC VSI. Application to double stator induction motors." Archives of Control Sciences 22, no. 1 (2012): 107–20. http://dx.doi.org/10.2478/v10170-011-0015-1.

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Stabilization of multi DC bus link voltages of multilevel NPC VSI. Application to double stator induction motors Voltage source multilevel inverters have become very attractive for power industries in power electronics applications during last years. The main purposes of studying multilevel inverters are the generation of output voltage signals with low harmonic distortion and reduction of switching frequency. An important issue of the multilevel inverter is the capacitor voltage-balancing problem. The unbalance of different DC voltage sources of multilevel neutral point clamped (NPC) voltage

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5

Juan, Ramírez, Cabezas Krissia, Jiménez Pedro, Canelos Raúl, and Escobar Bolívar. "Calculation of Voltage Distribution along the Insulator Strings of a 500 kV Transmission Line Based on Finite Element Method." Enfoque UTE 11, no. 3 (2020): 1–14. https://doi.org/10.29019/enfoque.v11n3.619.

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<strong>Resumen:</strong> En este artículo se puede apreciar las distribuciones de voltaje a lo largo de una cadena de aisladores de una línea de transmisión de 500 kV de Ecuador. El problema electrostático relacionado a la distribución de voltajes se resolvió utilizando el método de los elementos finitos. Se realiza un dibujo a escala 1:1 en una herramienta de dibujo tipo CAD para luego ser exportada al programa FEMM, que resuelve el problema y del que se obtienen los resultados relacionados a los voltajes en la cadena de aisladores. Se aprecia

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6

Sandeep, Singh, and Sharma Ankit. "Inspection of Multilayered Cascaded Inverters." Journals of Instrumantation & Innovation Science e-ISSN: 2456-9860 4, no. 3 (2019): 17–20. https://doi.org/10.5281/zenodo.3543018.

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<em>To the execution of STATCOM (Satellite Communications</em><em>) upon an appropriate high voltage and current level, there is requirement of high power VSC. But we have semiconductor devices, which are very limited to execute in high voltage and current ratings and therefore, it is very difficult to join a switch of semiconductor device directly to medium voltage networks (2.2-6.8 kV). One solution to this problem is to use multilayered VSC (Voltage Sourced Converter) to improve the output voltage. The multilayered inverters having a number of capacitor voltage starting power points an

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W., V. Yong, S. Chye M., C. Tan Y., L. Ong S., and H. Leong J. "MATLAB/simulink modelling and simulation of 9-level cascaded H-bridge multilevel inverter with mismatched DC sources." International Journal of Power Electronics and Drive System (IJPEDS) 10, no. 2 (2019): 617–24. https://doi.org/10.11591/ijpeds.v10.i2.pp617-624.

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This paper presents a MATLAB/Simulink model for a 9-level cascaded Hbridge multilevel inverter with mismatched DC voltage sources. The impact of mismatched DC voltage sources on the performance of the 9-level CHBMI is investigated. Due to the mismatched voltages among DC voltage sources, the output fundamental voltage is different from the input reference voltage. To address this problem, a switching-angle calculation technique that accounts for mismatched as well as varying DC voltage sources is demonstrated. The switching angles obtained using this technique is able to produce the desired ou

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8

Salih, Firas Abdul-hadi, and Turki Kahawish Hassan. "Capacitor voltages balancing method for buck modular DC/DC converter." International Journal of Power Electronics and Drive Systems (IJPEDS) 13, no. 4 (2022): 2277. http://dx.doi.org/10.11591/ijpeds.v13.i4.pp2277-2285.

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The most critical problem of the modular DC-DC converter (MDCC) is the voltage balancing of the submodule (SM) capacitors, the MDCC with stepped 2-level modulation has been developed and presents a good solution, however, this type of modulation has many restrictions when there is a wide range of capacitance tolerance of the SM capacitors that results inaccurate capacitor voltages balancing. To solve this problem, this paper discusses a proposed method of capacitor voltage balancing. Compared with stepped 2-level modulation, the voltage balancing method using modified duty cycle modulation off

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9

Firas, Abdul-Hadi Salih, and Kahawish Hassan Turki. "Capacitor voltages balancing method for buck modular DC/DC converter." International Journal of Power Electronics and Drive Systems 13, no. 4 (2022): 2277~2285. https://doi.org/10.11591/ijpeds.v13.i4.pp2277-2285.

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The most critical problem of the modular DC-DC converter (MDCC) is the voltage balancing of the submodule (SM) capacitors, the MDCC with stepped 2-level modulation has been developed and presents a good solution, however, this type of modulation has many restrictions when there is a wide range of capacitance tolerance of the SM capacitors that results inaccurate capacitor voltages balancing. To solve this problem, this paper discusses a proposed method of capacitor voltage balancing. Compared with stepped 2-level modulation, the voltage balancing method using modified duty cycle modulation off

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10

Yong, W. V., M. S. Chye, Y. C. Tan, S. L. Ong, and J. H. Leong. "MATLAB/Simulink modelling and simulation of 9-level cascaded h-bridge multilevel inverter with mismatched DC sources." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 2 (2019): 617. http://dx.doi.org/10.11591/ijpeds.v10.i2.pp617-624.

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<span lang="EN-US">This paper presents a MATLAB/Simulink model for a 9-level cascaded H-bridge multilevel inverter with mismatched DC voltage sources. The impact of mismatched DC voltage sources on the performance of the 9-level CHBMI is investigated. Due to the mismatched voltages among DC voltage sources, the output fundamental voltage is different from the input reference voltage. To address this problem, a switching-angle calculation technique that accounts for mismatched as well as varying DC voltage sources is demonstrated. The switching angles obtained using this technique is able

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11

GÜMÜŞ, Talha Enes, Selçuk EMİROĞLU, and Türker Fedai ÇAVUŞ. "REDUCING ACTIVE POWER LOSSES WITH OPTIMAL REACTIVE POWER DISPATCH IN 114 BUS NORTHWESTERN ANATOLIAN POWER SYSTEM." INTERNATIONAL REFEREED JOURNAL OF ENGINEERING AND SCIENCES, no. 18 (2022): 0. http://dx.doi.org/10.17366/uhmfd.2022.18.5.

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Aim: In this study, it has been proposed to solve the Optimal Reactive Power Dispatch (ORPD) problem with Genetic Algorithm (GA) in order to minimize the active power losses and voltage fluctuations in the 114 bus Northwestern Anatolian (NWA) power system. Method: The ORPD problem, which is modeled as a nonlinear optimization problem, has been solved by using GA. The ORPD problem has been applied to a large 114 bus power system in Northwestern Anatolia. By solving the ORPD problem, terminal voltages of generators and reactive power values of shunt compensators, which are optimal control variab

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12

Lopera-Mazo, Edwin H., and Jairo Espinosa. "Secondary voltage regulation based on average voltage control." TecnoLógicas 21, no. 42 (2018): 63–78. http://dx.doi.org/10.22430/22565337.779.

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This paper compares a conventional Secondary Voltage Regulation (SVR) scheme based on pilot nodes with a proposed SVR that takes into account average voltages of control zones. Voltage control significance for the operation of power systems has promoted several strategies in order to deal with this problem. However, the Hierarchical Voltage Control System (HVCS) is the only scheme effectively implemented with some relevant applications into real power systems.The HVCS divides the voltage control problem into three recognized stages. Among them, the SVR is responsible for managing reactive powe

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13

Lesniewska, Elzbieta. "Modern Methods of Construction Problem Solving in Designing Various Types of Instrument Transformers." Energies 15, no. 21 (2022): 8199. http://dx.doi.org/10.3390/en15218199.

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Current and voltage instrument transformers are essential elements of the power system. They work like transformers but do not transmit power. Their task is to accurately transform currents or voltages during system operation, which are then used for measurement and protection. These devices are very precise, and their accuracy is defined by the IEC/CEN standards. Instrument transformers are located at all transformer stations, specialized high-voltage and high-power laboratories, and testing and teaching laboratories. Therefore, the design requirements are very different depending on their ty

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14

Kasprzak, A., M. Orlikowski, and D. Brodecki. "Operation of voltage transformer in grids with distorted signals." Bulletin of the Polish Academy of Sciences: Technical Sciences 59, no. 4 (2011): 551–54. http://dx.doi.org/10.2478/v10175-011-0067-1.

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Operation of voltage transformer in grids with distorted signals Non-sinusoidal currents and voltages caused by nonlinear loads appear in power grids more and more frequently. Determination of the voltage transformer accuracy in such conditions makes a problem. Firstly, due to lack of definition of errors for distorted signals and secondly, typical measurement bridges do not accept higher harmonics. In the paper, the new definition of transformation error for distorted voltages has been proposed and some measurement results have been presented.

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15

Al-Naimi, Ibrahim I., Jasim A. Ghaeb, Mohammed J. Baniyounis, and Mustafa Al-Khawaldeh. "Fast detection technique for voltage unbalance in three-phase power system." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 4 (2021): 2230. http://dx.doi.org/10.11591/ijpeds.v12.i4.pp2230-2242.

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In this paper, the problem of voltage unbalance in the three-phase power systems is examined. A fast detection technique (FDT) is proposed to detect the voltage unbalance precisely and speedily. The well-known detection methods require more than one cycle time to detect the unbalanced voltages, whereas the proposed technique detects the unbalanced situations speedily in a discrete manner. Reducing the time duration required to detect the unbalanced voltages will enhance the dynamic response of the control system used to balance these voltages. The FDT acquires the instantaneous values of the t

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16

Ibrahim, I. Al-Naimi, A. Ghaeb Jasim, J. Baniyounis Mohammed, and Al-Khawaldeh Mustafa. "Fast detection technique for voltage unbalance in three-phase power system." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 4 (2021): 2230–42. https://doi.org/10.11591/ijpeds.v12.i4.pp2230-2242.

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In this paper, the problem of voltage unbalance in the three-phase power systems is examined. A fast detection technique (FDT) is proposed to detect the voltage unbalance precisely and speedily. The well-known detection methods require more than one cycle time to detect the unbalanced voltages, whereas the proposed technique detects the unbalanced situations speedily in a discrete manner. Reducing the time duration required to detect the unbalanced voltages will enhance the dynamic response of the control system used to balance these voltages. The FDT acquires the instantaneous values of the t

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17

Di Fazio, Anna, Mario Russo, and Michele De Santis. "Zoning Evaluation for Voltage Optimization in Distribution Networks with Distributed Energy Resources." Energies 12, no. 3 (2019): 390. http://dx.doi.org/10.3390/en12030390.

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This paper deals with the problem of the voltage profile optimization in a distribution system including distributed energy resources. Adopting a centralized approach, the voltage optimization is a non-linear programming problem with large number of variables requiring a continuous remote monitoring and data transmission from/to loads and distributed energy resources. In this study, a recently-proposed Jacobian-based linear method is used to model the steady-state operation of the distribution network and to divide the network into voltage control zones so as to reformulate the centralized opt

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18

Golub, Irina, and Evgeny Boloev. "Methods of linear and nonlinear state estimation of distribution network." E3S Web of Conferences 58 (2018): 03010. http://dx.doi.org/10.1051/e3sconf/20185803010.

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The paper proposes a new approach to the problem of state estimation of a low voltage distribution network by the measurements coming from smart meters. The problem of nonlinear state estimation based on the measurements of nodal powers and voltages is solved by the method of simple iteration which minimizes the quadratic function of the residues with and without the consideration of the constraint on the zero currents in the transit nodes. The same algorithms are proposed to use for linear state estimation based on the measurements of nodal currents and voltages. The effectiveness of the prop

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19

I, Wayan Sutama, Wayan Dikse Pancane I, Van Nover Marco, and Putu Abiyasa Agus. "Optimization of Load Balancing with Feeder Network Reconfiguration Using ETAP Simulation." RA JOURNAL OF APPLIED RESEARCH 08, no. 07 (2022): 540–44. https://doi.org/10.5281/zenodo.6825037.

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ABSTRACT Increasing electricity demand for tourism in Canggu Area of Bali Province, Indonesia has made the Tangeb feeder overloaded with load current more than 150 amperes. This results in voltages drop for 84 buses (59.15 %) below 19 kV. In this research, design and simulation of network reconfiguration to improve the voltage profile and reduce power losses were done using ETAP 12.6 software. The reconfiguration of network was done by changing the Load Balancing Switch (LBS) of Dukuh Sengguan to Normally Open (NO) as well as adding a Medium Voltage Twisted Insulated Cable (MVTIC) channel from

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20

Attia, Hussain. "Novel 9-Steps Automatic AC Voltage Regulator based on Two Step-down Transformers." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 2 (2017): 576. http://dx.doi.org/10.11591/ijece.v7i2.pp576-583.

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<p class="IEEEAbtract">A novel design and simulation results of 9-steps automatic AC voltage regulator based on one step-down transformer is presented in this paper. Avoiding the problem of surge at the AC load during controlling jump steps is done through the proposed design. Accurate and smooth controlling function is achieved as well. Instead of the necessity of increasing the number of taps of the used multi tap transformer for wide controlling range of fluctuated AC supply voltage, the proposed designed adopts using only two step down transformers with 10 Vrms, and 30 Vrms secondary

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Hussain, Attia. "Novel 9-Steps Automatic Voltage Regulator based on Two Step-Down Transformers." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 2 (2017): 576–83. https://doi.org/10.11591/ijece.v7i2.pp576-583.

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A novel design and simulation results of 9-steps automatic AC voltage regulator based on one step-down transformer is presented in this paper. Avoiding the problem of surge at the AC load during controlling jump steps is done through the proposed design. Accurate and smooth controlling function is achieved as well. Instead of the necessity of increasing the number of taps of the used multi tap transformer for wide controlling range of fluctuated AC supply voltage, the proposed designed adopts using only two step down transformers with 10 Vrms, and 30 Vrms secondary voltages respectively. Throu

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22

Marciniak, Lubomir, and Mateusz Piątek. "The influence of the network asymmetry on the settings and sensitivity of an earth fault protection using higher harmonics." E3S Web of Conferences 84 (2019): 02008. http://dx.doi.org/10.1051/e3sconf/20198402008.

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Detection of high resistance earth faults in medium voltage networks is an important problem due to ineffectiveness of traditional earth fault protections. Such short circuits can be detected by the criterion of a reactive power of higher harmonics for zero sequence current and voltage. The main problem is determination of the power setting value in the protection, which depends on the asymmetry of phase-to-earth capacitances and higher harmonics in supply voltages, which are generated by non-linear loads. The intensive tests of the asymmetry of the zero sequence currents and voltages for harm

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23

Huang, Fu, Junhong Lin, Daolu Zhang, and Dan Wu. "Low Voltage Power Line Physical Topology Recognition Method Based on Data Drive." Journal of Physics: Conference Series 2532, no. 1 (2023): 012006. http://dx.doi.org/10.1088/1742-6596/2532/1/012006.

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Abstract The current traditional low-voltage power line physical topology identification method mainly detects the line pulse signal to identify the line topology, leading to poor identification effects due to the lack of correlation analysis of node voltage. A data-driven low-voltage power line physical topology identification method is proposed in this regard. The correlation between the node timing voltages is analyzed by exploring the voltage law to determine the connection between low-voltage power lines. The node resistance values are also calculated to convert the physical topology iden

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Mohammed, Jamal Abdul-Kareem, Sahar R. Al-Sakini, and Arkan Ahmed Hussein. "Assessment of disturbed voltage supply effects on steady-state performance of an induction motor." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 3 (2020): 2259. http://dx.doi.org/10.11591/ijece.v10i3.pp2259-2270.

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An electric power system is usually exposed to unequal and variable loads across its three phases, which leads to voltage unbalance and variation, making the three-phase voltages asymmetrical in nature at the distribution end. This problem is clearly evident in Iraq country, particularly with regard to the fluctuating voltage levels of electricity distribution during peak hours. Providing a three-phase motor with asymmetric voltages is badly affecting its working performance. Estimating the performance of this motor at steady-state under different conditions of voltage disturbances is investig

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25

Anichebe, I. B., and A. O. Ekwue. "Improvement of bus voltage profiles of Nigerian power network in the presence of Static Synchronous Compensator (STATCOM) and Doubly Fed Induction Generator (DFIG)." Nigerian Journal of Technology 39, no. 1 (2020): 228–37. http://dx.doi.org/10.4314/njt.v39i1.26.

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Frequent blackouts and unstable supply of electricity show that the voltage instability problem has been one of the major challenges facing the power system network in Nigeria. This study investigates the voltage stability analysis of the Nigerian power network in the presence of renewable energy sources; FACTS device is used as a voltage controller. A 330kV, 28-bus power system network was studied using the PSS/E software-based Newton-Raphson load-flow technique. The results show that 10 out of the 28 buses had voltages lying below the statutory limit of 0.95 ≤ 1.05 p.u. The application of ST

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Jamal, Abdul-Kareem Mohammed, R. Al-Sakini Sahar, and Ahmed Hussein Arkan. "Assessment of disturbed voltage supply effects on steady-state performance of an induction motor." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 3 (2020): 2259–70. https://doi.org/10.11591/ijece.v10i3.pp2259-2270.

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An electric power system is usually exposed to unequal and variable loads across its three phases, which leads to voltage unbalance and variation, making the three-phase voltages asymmetrical in nature at the distribution end. This problem is clearly evident in Iraq country, particularly with regard to the fluctuating voltage levels of electricity distribution during peak hours. Providing a three-phase motor with asymmetric voltages is badly affecting its working performance. Estimating the performance of this motor at steady-state under different conditions of voltage disturbances is investig

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27

Haider, Fathi Kadom, Nasser Hussain Ali, and Khalid Shakir Al-Jubori Waleed. "Dual technique of reconfiguration and capacitor placement for distribution system." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 1 (2020): 80–90. https://doi.org/10.11591/ijece.v10i1.pp80-90.

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Radial Distribution System (RDS) suffer from high real power losses and lower bus voltages. Distribution System Reconfiguration (DSR) and Optimal Capacitor Placement (OCP) techniques are ones of the most economic and efficient approaches for loss reduction and voltage profile improvement while satisfy RDS constraints. The advantages of these two approaches can be concentrated using of both techniques together. In this study two techniques are used in different ways. First, the DSR technique is applied individually. Second, the dual technique has been adopted of DSR followed by OCP in order to

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Chukwulobe, O. O., P. I. Obi, E. A. Amako, and C. S. Ezeonye. "Improved Under-Voltage Load Shedding Scheme in Power System Network for South Eastern Nigeria." NIPES Journal of Science and Technology Research 4, no. 1 (2022): 212–23. https://doi.org/10.5281/zenodo.14520506.

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This paper presents an Improved Under-Voltage Load Shedding Scheme in Power System for South Eastern Nigeria distribution network. The south eastern Nigeria distribution network was first modeled and its load flow regenerated using Newton Raphson iterative load flow method for all 203 load buses in the network. The aim is to improve the existing network’s bus voltage profile with the use of various under-voltage load shedding schemes for improved power and its effect of the system voltage profile was analyzed and recorded for 100%, 60% and 50% load shedding case studies. Results showed a

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Hwang, Soon-Sang, Seung-Woo Baek, and Hag-Wone Kim. "Power Balance Method using Coupled Shunt Inductor and Multiple-Input Transformer for ISOP LLC Converter." Electronics 8, no. 3 (2019): 352. http://dx.doi.org/10.3390/electronics8030352.

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High-capacity power-supply systems using a large input voltage typically improve efficiency and can be miniaturized by dividing the input voltage into multiple small voltages, thereby minimizing the stress on the switching element and thus materializing a fast switching function. When a large input voltage is divided into small voltages in series through a DC link capacitor, power is supplied to each converter and the power of each LLC (Inductor-Inductor-Capacitor) converter can be divided and converted. However, such LLC converters, which are configured by the division of the input voltage, h

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Fasina, Taiwo, Bankole Adebanji, Adewale Abe, and Isiaka Ismail. "Impact of distributed generation on the Nigerian power network." Indonesian Journal of Electrical Engineering and Computer Science 21, no. 3 (2021): 1263–70. https://doi.org/10.11591/ijeecs.v21.i3.pp1263-1270.

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Distributed generations (DG) are being installed at increasing rates, both in developed and developing countries. The increasing number of DG connected to the distribution system could have a significant impact on the power system operation. This paper presents a case study investigating the impact of grid-connected DG on the Nigerian power network in terms of bus voltages and network losses. The results showed that without DG, some of the bus voltage magnitudes of the test system were outside the permissible voltage limit of 0.95pu≤Vi≤1.05p.u. However, with DG connected, the voltage mag

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Yoon, Kwang-Hoon, Joong-Woo Shin, Tea-Yang Nam, Jae-Chul Kim, and Won-Sik Moon. "Operation Method of On-Load Tap Changer on Main Transformer Considering Reverse Power Flow in Distribution System Connected with High Penetration on Photovoltaic System." Energies 15, no. 17 (2022): 6473. http://dx.doi.org/10.3390/en15176473.

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The increasing use of photovoltaics (PVs) in distribution systems owing to the low-carbon policy has given rise to the need for various technological changes. In particular, the operation of on-load tap changers (OLTCs) has attracted attention. In traditional distribution systems, the OLTC operates via a line-drop compensator (LDC), which focuses on the load to solve the low-voltage problem; however, the problem of over-voltage caused by PVs persists. Currently, a method for operating an OLTC using the measured voltage is being researched; however, solving the voltage problem for several feede

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Kang, Kyoung-Pil, Younghoon Cho, Ho-Sung Kim, and Ju-won Baek. "DC-Link Capacitor Voltage Imbalance Compensation Method Based Injecting Harmonic Voltage for Cascaded Multi-Module Neutral Point Clamped Inverter." Electronics 8, no. 2 (2019): 155. http://dx.doi.org/10.3390/electronics8020155.

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In a three-level (NPC) converter, the voltage imbalance problem in the DC-link capacitors is major issue. This paper proposes the DC-link capacitor voltage imbalance compensation method, where a common offset voltage is injected for a multi-module NPC inverter. The offset voltage consists of a harmonic voltage and a voltage difference between the upper and lower capacitors. The proposed method does not require any hardware modification, so that it is easily implemented. In order to show the effectiveness of the proposed balancing method, theoretical analysis is provided to balance the voltages

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Ragab, Dana, and Jasim Ghaeb. "Implementation of reactive compensator for voltage balancing using AI based models and novel performance index." International Journal of Power Electronics and Drive Systems (IJPEDS) 13, no. 1 (2022): 594. http://dx.doi.org/10.11591/ijpeds.v13.i1.pp594-605.

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Voltage-unbalance is one of the power quality deficiencies that degrades electrical power systems performance. In this work, voltage unbalance problem is tackled through two stages; evaluation using a novel performance index and mitigation using a thyristor-controlled reactor (TCR) compensator with artificial intelligent (AI) based models. Unlike standard performance indices that rely on voltages' root mean square (RMS) values, the proposed index depends on the space vector (SV) signal amplitude for voltage unbalance evaluation. This signal depends on the instantaneous values of the three-phas

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Dana, Ragab, and Ghaeb Jasim. "Implementation of reactive compensator for voltage balancing using AI based models and novel performance index." International Journal of Power Electronics and Drive Systems (IJPEDS) 13, no. 1 (2022): 594–605. https://doi.org/10.11591/ijpeds.v13.i1.pp594-605.

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Voltage-unbalance is one of the power quality deficiencies that degrades electrical power systems performance. In this work, voltage unbalance problem is tackled through two stages; evaluation using a novel performance index and mitigation using a thyristor-controlled reactor (TCR) compensator with artificial intelligent (AI) based models. Unlike standard performance indices that rely on voltages' root mean square (RMS) values, the proposed index depends on the space vector (SV) signal amplitude for voltage unbalance evaluation. This signal depends on the instantaneous values of the three-

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35

Burbelo, Mykhailo, Oleksii Babenko, Yurii Loboda, et al. "AUTOMATIC ADJUSTMENT OF REACTIVE POWER BY FACTS DEVICES UNDER CONDITIONS OF VOLTAGE INSTABILITY IN THE ELECTRIC NETWORK." Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska 13, no. 4 (2023): 109–13. http://dx.doi.org/10.35784/iapgos.5377.

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This article describes the problem of automatic regulation of reactive power using electronic devices FACTS (Flexible AC Transmission Systems): static synchronous compensator (STATCOM) and unified power flow controller (UPFC). With the help of a complex writing form, the following are determined: voltages at the installation nodes of the FACTS device and loads, currents of loads, power sources and electronic compensators in case of voltage instability at the load node of the electrical network. Voltages and currents are determined using the node-voltage method. The task of STATCOM is partial o

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Et. al., R. Durga Rao,. "Nanocrystalline based Mitigation Technique for Very Fast Transient over Voltages in Gas Insulated Substations." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 2 (2021): 1025–39. http://dx.doi.org/10.17762/turcomat.v12i2.1117.

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: in gas insulated substations, issue of very fast transient over voltages is very familiar problem because of its effects on live ultra-high voltage equipment. During switching events of disconnectors and circuit breakers prestrikes and restrikes occur due to which voltage transients propagate through gas insulated switchgear. Reflection retraction of these transients increases voltage magnitude and generates very high frequency oscillations. Mitigation or suppression of these voltage transients is important to protect equipment and their dielectric strength and insulation. Due to very high f

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Jiao, Junsheng. "Sliding Mode Control for Stabilizing of Boost Converter in a Solid Oxide Fuel Cell." Cybernetics and Information Technologies 13, no. 4 (2013): 139–47. http://dx.doi.org/10.2478/cait-2013-0060.

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Abstract The output voltage of Solid Oxide Fuel Cell (SOFC) is usually changed with the temperature and hydrogen flow rate. Since the fuel cell can generate a wide range of voltages and currents at the terminals, as a consequence, a constant DC voltage and function cannot be maintained by itself as a DC voltage power supply source. To solve this problem, a simple SOFC electrochemical model is introduced to control the output voltage. The Sliding Mode Control (SMC) is used to control the output voltage of the DC-DC converter for maintaining the constant DC voltage when the temperature and hydro

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Chitrakala, G., N. Stalin, and V. Mohan. "Normally Bypassed Cascaded Sources Multilevel Inverter with RGA Optimization for Reduced Output Distortion and Formulaic Passive Filter Design." Journal of Circuits, Systems and Computers 29, no. 02 (2019): 2050019. http://dx.doi.org/10.1142/s021812662050019x.

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The distributed generation involving multiple photovoltaic sources and synthesizing high-quality ac voltage from those multiple dc sources are nascent research ambits. A host of multilevel inverters (MLIs) has been ascertained for performing above errand diligently, where the component count is obnoxious. The single phase seven-level inverter is an acquiescent compromise between the circuit complexity and the quality of the output. Further enhancement on the performance can be succored through optimizing dc link voltages and switching angles. This paper proposes a component count pruned MLI st

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Bouchafaa, Farid, Mohamed Seghir Boucherit, and El Madjid Berkouk. "Feedback Loop Control Strategies of the Multi Dc Bus Link Voltages Using Adaptive Fuzzy Logic Control." Journal of Electrical Engineering 64, no. 3 (2013): 143–51. http://dx.doi.org/10.2478/jee-2013-0021.

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Voltage source multilevel inverters have become very attractive for power industries in power electronics applications during last years. The main purposes that have led to the development of the studies about multilevel inverters are the generation of output voltage signals with low harmonic distortion; the reduction of switching frequency. A serious constraint in a multilevel inverter is the capacitor voltage-balancing problem. The unbalance of different DC voltage sources of five-level neutral point clamping (NPC) voltage source inverter (VSI) constitutes the major limitation for the use of

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Radhika, Salyam, and Margaret Vijaya. "Source-load-variable voltage regulated cascaded DC/DC converter for a DC microgrid system." International Journal of Electrical and Computer Engineering (IJECE) 13, no. 1 (2023): 107–15. https://doi.org/10.11591/ijece.v13i1.pp107-115.

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Solar energy is available abundantly, the utilization of solar energy is developing rapidly and the photovoltaic based direct current (DC) microgrid system design is under demand but the stability of the DC voltage is of most important issue, as the variation of the output DC voltage is a common problem when the load or source voltage varies, hence a regulated DC output voltage converter is proposed. This paper presents source-loadvariable (SLV) voltage regulated cascaded DC/DC converter which is used to obtain regulated output voltage of 203.1 V DC at 0.4 duty ratio with ±2% voltage fl

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Aydin, Muhammed Sait, Sahban W. Alnaser, and Sereen Z. Althaher. "Using OLTC-Fitted Distribution Transformer to Increase Residential PV Hosting Capacity: Decentralized Voltage Management Approach." Energies 15, no. 13 (2022): 4836. http://dx.doi.org/10.3390/en15134836.

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The increasing Photovoltaic (PV) penetration in residential Low Voltage (LV) networks is likely to result in a voltage rise problem. One of the potential solutions to deal with this problem is to adopt a distribution transformer fitted with an On-Load Tap Changer (OLTC). The control of the OLTC in response to local measurements reduces the need for expensive communication channels and remote measuring devices. However, this requires developing an advanced decision-making algorithm to estimate the existence of voltage issues and define the best set point of the OLTC. This paper presents a decen

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Watson, Jonathan A., Ray A. Bucklin, and D. R. Bray. "Stray Voltages In Dairies." EDIS 2019 (December 9, 2019): 3. http://dx.doi.org/10.32473/edis-ae019-2019.

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A stray electrical current passing through a cow's body may cause reduced milk production and health problems. The electrical current can be caused by poor or faulty wiring, faulty equipment, improper grounding, or originate off the farm and be introduced through the grounded neutral wiring network. Stray voltages are usually low alternating current voltages on the grounded neutral wires of the farm wiring system. Power suppliers may use the terms neutral-to-ground voltage and neutral-to-earth voltage to refer to the problem. Lost milk production and the costs for treatment of the cow's health

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C, NagaDevi, J. K. Sree Vidhya Janani, A. Ishwarya T, and Gurunandhini S. "High Gain Step Up DC-DC Converter at Lower Duty Cycle." Perspectives in Communication, Embedded-systems and Signal-processing - PiCES 4, no. 9 (2021): 210–14. https://doi.org/10.5281/zenodo.4420073.

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Micro-grid provides high efficiency, low cost and clean energy. Micro-grid comes on variety of design and sizes. Nowadays, DC micro-grid plays a vital role because of remarkable amplifying DC load. Photo voltaic source is the first source of energy. High voltage gain in Boost converter is limited by high duty cycle. This will lead to serious reverse recovery problem, high conduction loss etc. Isolated converter such as fly back, Bridge converter etc. since the above problem. But it uses transformer or coupled inductor which causes voltages spike at the main switch and power loss due to leakage

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Abronzini, Umberto, Ciro Attaianese, Matilde D’Arpino, Mauro Di Monaco, and Giuseppe Tomasso. "Induction Motor Drives Fed by an NPC Inverter with Unbalanced DC-Link." Electronics 8, no. 12 (2019): 1379. http://dx.doi.org/10.3390/electronics8121379.

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Neutral Point Clamped (NPC) converters with n levels are traditionally controlled in such a way that the DC-link capacitors operate at 1/( n - 1) of the total DC-link voltage level. The voltage level across the DC-link capacitors has to be properly regulated by the capacitor unbalance control to contain the harmonic distortion of the converter output voltages. State-of-the-art modulation techniques address the problem of the DC-link voltage regulation for NPC inverters. However, they highly show reduced performance when unbalanced DC-link voltages are considered. In this paper, a novel Space V

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Kommula, Bapayya Naidu, and Venkata Reddy Kota. "A novel single input double output (SIDO) converter for torque ripple minimization in solar powered BLDC motor." International Journal of Renewable Energy Development 8, no. 2 (2019): 161. http://dx.doi.org/10.14710/ijred.8.2.161-168.

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This paper proposes a new converter topology for torque ripple reduction in Brushless DC (BLDC) motor. Due to the torque ripple problem, the use of this motor is limited to few applications. In this paper, a Single Input Double Output (SIDO) converter is proposed to suppress the torque ripple in BLDC motor. The proposed SIDO converter provides two output voltages. One for supplying the motor throughout conduction time and second output voltage is given to the non-commutating phase of motor during commutation instants. This proposed SIDO converter is fed from Photo Voltaic (PV) system. This pap

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Zhao, Jianfei, Changjiu Kong, Tingzhang Liu, and Ruihua Li. "Research on an Auto-Optimized Capacitor Voltage Balancing Control Strategy of MMC SM for Renewable Energy HVDC Transmission System." Electronics 8, no. 1 (2019): 104. http://dx.doi.org/10.3390/electronics8010104.

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The Modular Multilevel Converter (MMC) is one of the most attractive converter topologies in the High Voltage Direct Current (HVDC) transmission field. The latest widely used sorting method has a low algorithm complexity. It can effectively balance the sub-module (SM) capacitor voltages, but it would cause relatively high switching frequency and power loss. Aiming at the problem that the sub-module (SM) capacitor voltage sorting algorithm has a large switching loss due to the high switching frequency of the device, this paper proposes an auto-optimized capacitor voltage balancing control strat

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Kholiddinov, I. Kh, G. F. Musinova, M. E. Yulchiev, Z. Z. Tuychiev, and M. M. Kholiddinova. "Modeling Of Calculation Of Voltage Unbalance Factor Using Simulink (Matlab)." American Journal of Engineering And Techonology 02, no. 10 (2020): 33–37. http://dx.doi.org/10.37547/tajet/volume02issue10-07.

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This paper presents the problem of power quality in asymmetric modes in low-voltage electrical networks. The modeling of determination of power value, voltages and currents and, accordingly, their symmetric components, using the Simulink package in the MatLab program is shown.

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Adhikari, Yuba Raj, and Rishi Kumar Barnawal. "Artificial Neural Network Based Approach for Voltage Stability Analysis of for Sustained Operation of Power System." Journal of Advanced College of Engineering and Management 6 (July 10, 2021): 259–67. http://dx.doi.org/10.3126/jacem.v6i0.38364.

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For reliable and secure power system, the stability analysis is recognized as an important problem. Voltage stability is the capacity of a power system to maintain steady acceptable voltages at all buses in the system. Voltage stability index (VSI) evaluation for a situation of power system can act as an accurate and fast indicator of the proximity of the system to voltage instability. Recently there has been considerable interest in intelligent methods based on artificial neural network (ANN), fuzzy logic and genetic algorithm to voltage stability assessment problem. ANN, with the ability to

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Salyam, Radhika, and Vijaya Margaret. "Source-load-variable voltage regulated cascaded DC/DC converter for a DC microgrid system." International Journal of Electrical and Computer Engineering (IJECE) 13, no. 1 (2023): 107. http://dx.doi.org/10.11591/ijece.v13i1.pp107-115.

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<span lang="EN-US">Solar energy is available abundantly, the utilization of solar energy is developing rapidly and the photovoltaic based direct current (</span><span lang="EN-US">DC) microgrid system design is under demand but the stability of the DC voltage is of most important issue, as the variation of the output DC voltage is a common problem when the load or source voltage varies, hence a regulated DC output voltage converter is proposed. This paper presents source-load-variable (SLV) voltage regulated cascaded DC/DC converter which is used to obtain regulated output vo

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Ahmadreza, Eslami. "Index-based optimal DG allocation for voltage quality improvement in an unbalanced network." Global Journal of Engineering and Technology Advances 6, no. 2 (2021): 090–103. https://doi.org/10.5281/zenodo.4616229.

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Voltage quality is a one of the major concerns in distribution systems. Distributed Generations (DGs) have the potential to improve voltage quality, if optimally planned and operated. Considering the problem of DG siting and sizing, this paper aims at integrating technical factors, particularly voltage quality, in planning of DGs. Hence, a methodology is proposed which optimizes voltage quality in the presence of DGs and can be used as one of the objectives in a multi-objective problem or as an intermediate stage in usual DG planning.  Modified voltage quality indices are proposed which c

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