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Journal articles on the topic 'Voltage index'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Su, Shi, Qingyang Xie, Mengyuan Wang, Yu Wang, Jianfei Chen, and Zhikun Hu. "Simple Voltage Balancing Control of Four-Level Inverter." Electronics 13, no. 19 (2024): 3878. http://dx.doi.org/10.3390/electronics13193878.

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Multilevel inverters with improved voltage quality are widely used in applications such as motor control and electric vehicles. The four-level active neutral point clamped (4L-ANPC) inverter effectively meets the demands for high power density and low device voltage stress. However, balancing the capacitor voltage and reducing its low-frequency voltage fluctuation are critical challenges that need to be addressed. To address these challenges, this paper proposes a “variable reference + zero-sequence injection” method that requires only three reference voltage signals to determine the injected

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2

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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3

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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4

Zhikui, Zhang, Gao Yuan, and Wang Xin. "A comparative study of voltage stability NVSI Index and load margin index." Global Journal of Engineering and Technology Advances 17, no. 1 (2023): 094–103. https://doi.org/10.5281/zenodo.10674889.

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With the development of new energy generation technologies, photovoltaic (PV) power generation has gained widespread application as a clean and sustainable source of electricity. However, the intermittency and variability of PV generation pose new challenges to power system secure and stable operation. The WSCC 9-bus system is used in this paper to investigate the effect of PV integration on static voltage stability in power systems. An improved voltage stability index (NVSI) considering the new energy was used to measure the voltage stability of the access point of PV plant. Compared with the

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S.Jaber, Aqeel. "Maximum voltage gain index for distributed generators based on voltage power system profile." International Journal of Engineering & Technology 7, no. 4 (2019): 5612–17. http://dx.doi.org/10.14419/ijet.v7i4.23652.

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The challenges facing power systems have shown a growing tendency in the studies on distributed generation in the modernized world. One of the most important objectives of distributed generation systems is an improvement of the quality of power systems. Many indices have been proposed in the electrical power system literature. However, the previous criteria did not give a clear voltage advantage of the distributed generatorâ€™s location. In this paper, a new index is proposed to gauge the placement of distributed generators (DGs) in a power system. The new index depends on the maximum voltage

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6

Oukennou, Aziz, and Abdelhalim Sandali. "Novel Voltage Stability Index for Electric Power System Monitoring." International journal of electrical and computer engineering systems 10, no. 1 (2019): 1–9. http://dx.doi.org/10.32985/ijeces.10.1.1.

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This paper aims to develop a novel voltage stability index (NVSI) to evaluate and detect the voltage collapse proximity in the power system. This NVSI is based on the combination of two indices and the approximation made on the difference in angle between the sending bus and the receiving one in the power system. Compared to indices developed in the literature, the advantage of the new voltage stability index (NVSI) is that it can be computed very quickly and easily from power flow results, such as voltages, magnitudes and angles. The static and dynamic studies have been carried out on the IEE

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7

Gubina, F., and B. Strmcnik. "Voltage collapse proximity index determination using voltage phasors approach." IEEE Transactions on Power Systems 10, no. 2 (1995): 788–94. http://dx.doi.org/10.1109/59.387918.

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8

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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9

Zhikui Zhang, Yuan Gao, and Xin Wang. "A comparative study of voltage stability NVSI Index and load margin index." Global Journal of Engineering and Technology Advances 17, no. 1 (2023): 094–103. http://dx.doi.org/10.30574/gjeta.2023.17.1.0209.

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With the development of new energy generation technologies, photovoltaic (PV) power generation has gained widespread application as a clean and sustainable source of electricity. However, the intermittency and variability of PV generation pose new challenges to power system secure and stable operation. The WSCC 9-bus system is used in this paper to investigate the effect of PV integration on static voltage stability in power systems. An improved voltage stability index (NVSI) considering the new energy was used to measure the voltage stability of the access point of PV plant. Compared with the

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10

Wondie, Tebeje Tesfaw, and Teshome Goa Tella. "Voltage Stability Assessments and Their Improvement Using Optimal Placed Static Synchronous Compensator (STATCOM)." Journal of Electrical and Computer Engineering 2022 (August 23, 2022): 1–12. http://dx.doi.org/10.1155/2022/2071454.

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In this paper, static voltage stability assessments and their improvement using analytical and optimization techniques with different loading scenarios are described. In this study, the 400 kV, 230 kV, and 132 kV Ethiopian electric power networks are modeled using Power System Analysis Toolbox (PSAT), and the load flow analysis is carried out using MATLAB source code. Then, different voltage stability indices, such as the user-defined advanced voltage stability index (AVSI), modified voltage stability index (MVSI), and fast voltage stability index (FVSI), are used to identify the voltage unsta

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11

Rosidah, Siti, Ari Soewondo, and Mateus Sakundarno Adi. "Optimasi Kualitas Citra Radiografi Abdomen Berdasarkan Body Mass Index dan Tegangan Tabung pada Computed Radiography." Jurnal Epidemiologi Kesehatan Komunitas 5, no. 1 (2020): 23–31. http://dx.doi.org/10.14710/jekk.v5i1.5866.

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Background: Computed Radiography is a modality of radiographic processing that has wide-exposure latitude. So that in radiographic examination with CR modality is less concerned with the accuracy of the exposure factor especially in the use of tube voltage that can affect the image quality. Image quality determines the accuracy of diagnosis of an illness. Abdominal examination is often done in the radiological installation of Hospital, with different patient conditions especially in Body Mass Index the use of tube voltages tends to vary so as to affect the quality of radiograph and received do

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12

Palanisamy, R., S. Vidyasagar, V. Kalyanasundaram, et al. "A new multilevel DC-AC converter topology with reduced switch using multicarrier sinusoidal pulse width modulation." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 2 (2020): 752. http://dx.doi.org/10.11591/ijpeds.v11.i2.pp752-761.

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Multilevel converters have a significant role in power processing control in the power system, which has some inherent features like reduced harmonics, high power &amp; medium voltage, reduced voltage stress. In this proposed paper, a novel multilevel inverter with reduced number of switches and without passive components. The proposed inverter generates 15 level output voltage with suitable switching pulse generation using multicarrier sinusoidal pulse width modulation (MSPWM) and different level of voltages are obtained with variation of modulation index. Also coupled inductor is used to

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13

R., Palanisamy, Vidyasagar S., Kalyanasundaram V., et al. "A new multilevel DC-AC converter topology with reduced switch using multicarrier sinusoidal pulse width modulation." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 2 (2020): 752–61. https://doi.org/10.11591/ijpeds.v11.i2.pp752-761.

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Multilevel converters have a significant role in power processing control in the power system, which has some inherent features like reduced harmonics, high power & medium voltage, reduced voltage stress. In this proposed paper, a novel multilevel inverter with reduced number of switches and without passive components. The proposed inverter generates 15 level output voltage with suitable switching pulse generation using multicarrier sinusoidal pulse width modulation (MSPWM) and different level of voltages are obtained with variation of modulation index. Also coupled inductor is used to min

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14

Pérez, Sandra, Karol López, and Luis Rodríguez. "Optimal under voltage load shedding based on voltage stability index." Ingeniería e Investigación 36, no. 2 (2016): 43. http://dx.doi.org/10.15446/ing.investig.v36n2.53773.

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This paper presents a methodology for under voltage load shedding using a metaheuristic optimization technique and a stability criterion. Two strategies are proposed to find the minimal size and location of load to shed for the recovery of normal operation conditions. The first one is based on a classical criterion for the under voltage load shedding, identifying the load to disconnect by considering bus voltage level; the second includes a simplified voltage stability index SVSI, which identifies critical buses in the system. The proposed methodology is implemented in an IEEE 14 bus test syst

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15

Pérez-Londoño, S., L. F. Rodríguez, and G. Olivar. "A Simplified Voltage Stability Index (SVSI)." International Journal of Electrical Power & Energy Systems 63 (December 2014): 806–13. http://dx.doi.org/10.1016/j.ijepes.2014.06.044.

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16

Gupta, Santosh Kumar, Sanjeev Kumar Mallik, Dhananjay Kumar, and Shashi Kumar. "Voltage stability assessment of the power system using novel line voltage collapse index." Engineering Research Express 6, no. 2 (2024): 025324. http://dx.doi.org/10.1088/2631-8695/ad4254.

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Abstract Nowadays, for the maximum utilization of the power available, power systems are operated at their maximum stability limit due to the scarcity of natural resources. In this situation, quick monitoring and control of the power systems are very necessary for the electrical operators. This paper presents a novel line voltage stability index based on V-Q sensitivity. The index is created utilizing the network’s ABCD parameters and is based on an exact transmission system model. The new index is evaluated in terms of ABCD parameters from the reactive power equation of the power system. The

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17

Lee, Hong Seok, Jong O. Kang, On You Lee, et al. "Analysis on the Degradation Characteristics of 2G High-Tc Superconducting Wires in Accordance with Electrical Breakdown Voltage." Advanced Materials Research 1125 (October 2015): 593–97. http://dx.doi.org/10.4028/www.scientific.net/amr.1125.593.

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Recently, extensive studies have been carried out on developing a high voltage superconducting apparatus as a substitute for the conventional one. superconducting wires used for a high voltage superconducting apparatus can be damaged under high voltage condition due to electrical breakdown and the damaged superconducting wires may result in the degradation of the critical current (Ic) and index number. Therefore, a study on the degradation characteristics of superconducting wires in accordance with the electrical breakdown should be performed. In this paper, the degradation characteristics of

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18

Wang, Yang, Wenyuan Li, and Jiping Lu. "A new node voltage stability index based on local voltage phasors." Electric Power Systems Research 79, no. 1 (2009): 265–71. http://dx.doi.org/10.1016/j.epsr.2008.06.010.

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19

Ratra, Saurabh, Rajive Tiwari, and K. R. Niazi. "Voltage stability assessment in power systems using line voltage stability index." Computers & Electrical Engineering 70 (August 2018): 199–211. http://dx.doi.org/10.1016/j.compeleceng.2017.12.046.

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20

Gu, Wei, and Qiulan Wan. "Linearized voltage stability index for wide-area voltage monitoring and control." International Journal of Electrical Power & Energy Systems 32, no. 4 (2010): 333–36. http://dx.doi.org/10.1016/j.ijepes.2009.09.003.

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21

Ahmed, Majeed Ghadban, Abdullah Salman Ghassan, and Idan Hussein Husham. "Assessment of voltage stability based on power transfer stability index using computational intelligence models." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 4 (2021): 2790–97. https://doi.org/10.11591/ijece.v11i4.pp2790-2797.

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In this paper, the importance of voltage stability is explained, which is a great problem in the EPS. The estimation of VS is made a priority so as to make the power system stable and prevent it from reaching voltage collapse. The power transfer stability index (PTSI) is used as a predictor utilized in a PSN to detect the instability of voltages on weakened buses. A PSI is used to obtain a voltage assessment of the PSNs. Two hybrid algorithms are developed. The (CA-NN) and the (PSO-NN). After developing algorithms, they are compared with the actual values of PTSI NR method. The algorithms inst

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22

Krenc, Zbigniew. "Relationship Between Adaptive Morphological and Electrophysiological Remodeling of the Left Ventricle in Young Athletes After an 8-Month Period of Sports Training." Pediatric Exercise Science 28, no. 1 (2016): 71–76. http://dx.doi.org/10.1123/pes.2015-0106.

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Purpose:The aim of this investigation was to assess the influence of an 8-month physical training period on left ventricular voltages identified by resting ECG in relation to changes in left ventricle mass in adolescent athletes.Methods:The study encompassed 28 adolescents aged 13 years (14 boys and 14 girls) from a sports secondary school. Clinical assessment was performed on all athletes before and after 8 months of physical training.Results:Sokolov-Lyon voltage index, Cornell voltage index, and maximum spatial QRS vector magnitude demonstrated statistically significant decline during the st

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23

Xu, Jian Yuan, Wei Fu Qi, and Yun Teng. "Index of Wind Power Grid System Based on Multi-Index Weighted Stability Method." Advanced Materials Research 694-697 (May 2013): 799–802. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.799.

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This paper proposes an optimal mean power function index based on the weighted multi-index method for the electrical network containing wind farm. It combines the index of Jacobi matrix mutual condition number with the index of sensitivity inverse matrix elements the power and are obtained by the self program. The EPRI-36 node test system and a regional power grid containing large wind farms are selected to test the validity of the proposed index. The results show that this index has a shorter calculation time and accurate prediction compared to the traditional voltage stability indexes. It is

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24

Djami Olii, Eddy Djubir Kembuan, Joucke Rapar, and Agus Takaredase. "Analysis of the Voltage Stability of Power Using L-Index Voltage Stability." Technium: Romanian Journal of Applied Sciences and Technology 17 (November 1, 2023): 407–12. http://dx.doi.org/10.47577/technium.v17i.10116.

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Voltage stability is highly dependent on the ability of the system to maintain voltage conditions throughout the bus, both under normal conditions and after a disturbance. One static analysis tool often used is the power flow completion method to determine the voltage magnitude at several points under review. This paper presents static voltage stability analysis for heavy and light load conditions on the load bus. Voltage stability analysis is performed on the IEEE-14 power system bus using the L-index voltage stability method. L-index values ranging from 0 – 1, buses with L-index voltage stab

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25

Lim, Jeong-Woo, Hanyoung Bu, and Younghoon Cho. "Novel Dead-Time Compensation Strategy for Wide Current Range in a Three-Phase Inverter." Electronics 8, no. 1 (2019): 92. http://dx.doi.org/10.3390/electronics8010092.

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This paper proposes a novel three-phase voltage source inverter dead-time compensation strategy for accurate compensation in wide current regions of the inverter. In particular, an analysis of the output voltage distortion of the inverter, which appears as parasitic components of the switches, was conducted for proper voltage compensation in the low current region, and an on-line compensation voltage controller was proposed. Additionally, a new trapezoidal compensation voltage implementation method using the current phase was proposed to simplify realizing the trapezoidal shape of the three-ph

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Zhang, Yinhua, Shengming Xiong, Wei Huang, and Kepeng Zhang. "Determination of refractive index and thickness of YbF3 thin films deposited at different bias voltages of APS ion source from spectrophotometric methods." Advanced Optical Technologies 7, no. 1-2 (2018): 33–37. http://dx.doi.org/10.1515/aot-2017-0072.

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AbstractYtterbium fluoride (YbF3) single thin films were prepared on sapphire and monocrystalline silicon substrates through conventional thermal evaporation and ion beam-assisted deposition (IAD), at bias voltages ranging from 50 to 160 V of the Leybold advanced plasma source (APS). By using the Cauchy dispersion model, the refractive index and thickness of the YbF3thin films were obtained by fitting the 400–2500 nm transmittance of the monolayer YbF3thin films on the sapphire substrate. At the same time, the refractive index and thickness of the YbF3thin films on the monocrystalline silicon

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27

Enrique, C. Quispe, D. López Iván, J. T. E. Ferreira Fernando, and Sousa Vladimir. "Unbalanced Voltages Impacts on the Energy Performance of Induction Motors." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 3 (2018): 1412–22. https://doi.org/10.11591/ijece.v8i3.pp1412-1422.

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This paper presents the results of a study about the effects of unbalanced voltages on the energy performance of three-phase induction motors. The principal contribution of this paper is that presents a detailed analysis of the influence of positive and negative sequence voltage components and the angle between them on several characteristics such as: line currents, losses, efficiency and power factor under different voltage unbalanced conditions. A three-phase induction motor of 3 HP was used as a case study. The results of the investigation show that the positive sequence voltage must be con

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28

Chattopadhyay, Tapan Kumar, Sumit Banerjee, and Chandan Kumar Chanda. "Voltage Stability Index of Radial Distribution Networks by Considering Distributed Generator for Different Types of Loads." International Journal of Energy Optimization and Engineering 5, no. 1 (2016): 1–22. http://dx.doi.org/10.4018/ijeoe.2016010101.

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The paper presents an approach on voltage stability analysis of distribution networks for loads of different types. A voltage stability index is proposed for identifying the node, which is most sensitive to voltage collapse. It is shown that the node, at which the value of voltage stability index is maximum, is more sensitive to voltage collapse. For the purpose of voltage stability analysis, constant power, constant current, constant impedance and composite load modeling are considered. Distributed generation can be integrated into distribution systems to meet the increasing load demand. It i

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29

Zhang, Yangnan, and Lihui Sui. "Dynamic voltage safety measurement and assessment index considering short-term voltage stability." Journal of Physics: Conference Series 2803, no. 1 (2024): 012006. http://dx.doi.org/10.1088/1742-6596/2803/1/012006.

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Abstract At present, most of the short-term voltage stability criteria used in various power grids are based on voltage waveform, but these criteria can only determine whether the voltage is stable in the power system, but cannot give the relative degree of voltage stability. To evaluate and further plan reactive power reserves in power systems, a criterion for evaluating the short-term voltage stability (STVS) of power systems is needed. In this paper, a Dynamic Voltage Safety Measurement and Assessment Index (DVSMAI), which is based only on bus voltage data, is proposed, consisting of three

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30

Rui Ding and Na Zhang. "Application analysis of voltage stability index in a power system with new energy vehicles integration." Global Journal of Engineering and Technology Advances 21, no. 3 (2024): 203–9. https://doi.org/10.30574/gjeta.2024.21.3.0226.

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The paper analyses the influence of new energy vehicles on the voltage stability of the power system after grid-connected charging, and introduces two voltage stability indexes (L index and VCPI index) that can intuitively reflect the voltage stability level of the power system. Based on the typical voltage stability test model of the power system, two sets of new energy vehicle loads are added for simulation analysis, and the voltage stability state of the important buses (including the charging buses) in the system under different load combinations is observed. Through the collection of data

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31

Martinez, J. A., and J. Martin-Arnedo. "Voltage Sag Studies in Distribution Networks—Part III: Voltage Sag Index Calculation." IEEE Transactions on Power Delivery 21, no. 3 (2006): 1689–97. http://dx.doi.org/10.1109/tpwrd.2006.874111.

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32

Haque, M. H. "A Linear Voltage Stability Index to Estimate the Distance to Voltage Collapse." Australian Journal of Electrical and Electronics Engineering 5, no. 1 (2008): 55–64. http://dx.doi.org/10.1080/1448837x.2008.11464200.

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33

Arya, L. D., S. C. Choube, and M. Shrivastava. "Technique for voltage stability assessment using newly developed line voltage stability index." Energy Conversion and Management 49, no. 2 (2008): 267–75. http://dx.doi.org/10.1016/j.enconman.2007.06.018.

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34

Li, Sheng, Yuan Gao, and Chengcheng Jiang. "A static voltage stability index based on P-V curve for the medium-voltage distribution network with distributed PV." Journal of Physics: Conference Series 2591, no. 1 (2023): 012042. http://dx.doi.org/10.1088/1742-6596/2591/1/012042.

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Abstract With the rapid increase of distributed photovoltaic (DPV) generations, the static voltage stability (SVS) of distribution network (DN) is faced with more and more challenges. Considering the characteristics of DPV and the network structure, an appropriate static voltage stability index (SVSI) in the medium-voltage DN with DPV is studied in this paper. In terms of the limitation of the traditional SVSI that only reflects the load change, based on P-V curve, a novel voltage change rate - network load change rate index (M-index) is proposed. The M-index considers the impacts of double ch

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35

Deng, Hongyuan, Yudong Jia, Yongqiang Zhu, and Ruihua Xia. "Probabilistic Voltage Optimization Considering Load Static Voltage Characteristics." Journal of Physics: Conference Series 2731, no. 1 (2024): 012034. http://dx.doi.org/10.1088/1742-6596/2731/1/012034.

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Abstract In the conventional power flow calculation, the load is mostly treated as a constant power node. When the voltage deviation occurs, the static voltage characteristics of the load will change, resulting in the change of the power flow calculation. This situation is more likely to occur in the distribution network with distributed power supply. Therefore, it is very important to consider the static voltage response characteristics of the load in the power flow calculation. In the existing literature, when evaluating and optimizing voltage stability, deterministic indicators are usually

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Espinosa, Eduardo, Pedro Melín, Carlos Baier, José Espinoza, and Hugo Garcés. "An Efficiency Analysis of 27 Level Single-Phase Asymmetric Inverter without Regeneration." Energies 14, no. 5 (2021): 1459. http://dx.doi.org/10.3390/en14051459.

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For medium voltage applications, multilevel inverters are used. One of its classic topologies is the Cascaded H-Bridge, which requires isolated DC voltages to work. Depending on the DC voltage ratio used in the Cascaded H-bridge can be classified into symmetric and asymmetric. In comparison between symmetric and asymmetric inverters, the latter can generate an AC output voltage with more output voltage levels. DC voltage ratio most documented are binary and trinary. The last can generate an AC voltage of 3n = 27 levels is obtained, using n = 3 inverters in cascade and NLM modulation, which gen

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37

Quispe, Enrique C., Iván D. López, Fernando J. T. E. Ferreira, and Vladimir Sousa. "Unbalanced Voltages Impacts on the Energy Performance of Induction Motors." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 3 (2018): 1412. http://dx.doi.org/10.11591/ijece.v8i3.pp1412-1422.

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<p class="Abstract">This paper presents the results of a study about the effects of unbalanced voltages on the energy performance of three-phase induction motors. The principal contribution of this paper is that presents a detailed analysis of the influence of positive and negative sequence voltage components and the angle between them on several characteristics such as: line currents, losses, efficiency and power factor under different voltage unbalanced conditions. A three-phase induction motor of 3 HP was used as a case study. The results of the investigation show that the positive se

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38

Guerrero-Guerrero, Andres Felipe, Armando Ustariz-Farfan, Eduardo Cano-Plata, et al. "Voltage sags: energy and severity index assessment." Revista UIS Ingenierías 18, no. 1 (2019): 141–48. http://dx.doi.org/10.18273/revuin.v18n1-2019012.

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39

Venkatesh, B., Alex Rost, and Liuchen Chang. "Dynamic Voltage Collapse Index— Wind Generator Application." IEEE Transactions on Power Delivery 22, no. 1 (2007): 90–94. http://dx.doi.org/10.1109/tpwrd.2006.887097.

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40

Smon, I., G. Verbic, and F. Gubina. "Local Voltage-Stability Index Using Tellegen's Theorem." IEEE Transactions on Power Systems 21, no. 3 (2006): 1267–75. http://dx.doi.org/10.1109/tpwrs.2006.876702.

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41

Lof, P. A., T. Smed, G. Andersson, and D. J. Hill. "Fast calculation of a voltage stability index." IEEE Transactions on Power Systems 7, no. 1 (1992): 54–64. http://dx.doi.org/10.1109/59.141687.

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42

Ghadban, Ahmed Majeed, Ghassan Abdullah Salman, and Husham Idan Hussein. "Assessment of voltage stability based on power transfer stability index using computational intelligence models." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 4 (2021): 2790. http://dx.doi.org/10.11591/ijece.v11i4.pp2790-2797.

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<span>In this paper, the importance of voltage stability is explained, which is a great problem in the EPS. The estimation of VS is made a priority so as to make the power system stable and prevent it from reaching voltage collapse. The power transfer stability index (PTSI) is used as a predictor utilized in a PSN to detect the instability of voltages on weakened buses. A PSI is used to obtain a voltage assessment of the PSNs. Two hybrid algorithms are developed. The (CA-NN) and the (PSO-NN). After developing algorithms, they are compared with the actual values of PTSI NR method. The alg

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Hbeeb, Sadeq A. "A Reduction of the Half-Wave Voltage for Lithium Niobate Electro-Optic Mach-Zehnder Modulator." International Journal of Membrane Science and Technology 10, no. 2 (2023): 3066–74. http://dx.doi.org/10.15379/ijmst.v10i2.3044.

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In this research, it proposes theoretically model to controlling on half-wave voltage of modulator, in which it uses studying the factor of effective of refractive index difference, this using analysis distribution of refractive index for LN material before and after voltage is applied (i.e., with and without applied voltage), and uses analysis a factor of propagation constant difference ??, before and after voltage is applied where it depends on the wavelength, these leads to it controls on the half-wave voltage V? using a reduction half-wave voltage up to 1V. Also, it achieves an excellent s

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Xi, Rui, Jiaxun He, Ya Zhang, et al. "Effect of Interfacial Protrusion Defects on the Electrical Strength of Cross-linked Polyethylene." Journal of Physics: Conference Series 2956, no. 1 (2025): 012007. https://doi.org/10.1088/1742-6596/2956/1/012007.

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Abstract Interfacial protrusion defects between the insulation layer and the semiconducting shield of cross-linked polyethylene cables can distort the electric field in nearby areas, posing risks to the safe and reliable operation of the cables. This study prepared specimens with various forms of interfacial protrusions under laboratory conditions using two types of insulating materials, including cross-linked polyethylene (XLPE) for medium-voltage and for high-voltage. The effects of these protrusion defects on the electrical strength and life index of XLPEs were evaluated through breakdown t

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Samuel, Isaac, Adebola Soyemi, Ayokunle Awelewa, James Katende, and Claudius Awosope. "Voltage collapse prediction using artificial neural network." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 1 (2021): 124–32. https://doi.org/10.11591/ijece.v11i1.pp124-132.

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Unalleviated voltage instability frequently results in voltage collapse; which is a cause of concern in power system networks across the globe but particularly in developing countries. This study proposed an online voltage collapse prediction model through the application of a machine learning technique and a voltage stability index called the new line stability index (NLSI_1). The approach proposed is based on a multilayer feed-forward neural network whose inputs are the variables of the NLSI_1. The efficacy of the method was validated using the testing on the IEEE 14-bus system and the Niger

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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. http://dx.doi.org/10.30574/gjeta.2021.6.2.0020.

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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 conside

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Sun, Zhi Wei, and Xiao Liu. "A Novel Index to Voltage Collapse based on the System Physical Quantities." Advanced Materials Research 433-440 (January 2012): 6060–64. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.6060.

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This paper presents a new index to voltage collapse based on the system physical quantities such as nodes' voltages and injected powers.The index has a critical value. It is physically meaningful, varies smoothly when the system changes (i.e. does not exhibit discontinous changes on value for small system changes such as oLTCs´action). This new index does not need to build any models and not be limited with load patterns.Moreover it can be used to real time system monitoring because it can be easily calculated , and can alert operators to take appropriate actions. The simulate result is very p

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Arismendy-Mira, Julián Esteban, Andrés Camilo Henao-Muñoz, and Andrés Julián Saavedra-Montes. "Modeling of a Computer Using the Norton Model for Harmonic Analysis." Scientia et Technica 23, no. 3 (2018): 315–23. http://dx.doi.org/10.22517/23447214.18021.

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The Norton model of a personal computer for harmonic analysis is presented in this paper. The parameters of the model are estimated from two experiments, in which the computer is powered by two different voltages. The model is simulated and the current and voltage waveforms are compared with the experimental waves. The results show that Norton model is valid to represent a personal computer because the error index of the current and voltage waveforms and harmonic spectrums is lower than 8.5%.

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Doni, Donata, Rudy Gianto, and Zainal Abidin. "Voltage Stability Index Improvement In Radial Distribution Systems Using Capacitors." Journal of Electrical Engineering, Energy, and Information Technology (J3EIT) 12, no. 1 (2024): 342. http://dx.doi.org/10.26418/j3eit.v12i1.76767.

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The radial distribution network system is an important part of the electric power system because this distribution system is useful for distributing electricity to loads (customers). the existence of voltage drops and electric power losses in the provision of electrical energy is something that cannot be avoided. There are several ways that can be done to improve voltage, one of which is the installation of Shunt capacitors in the primary distribution network. Voltage drop can occur in the power system due to the loss of voltage stability in the radial distribution network. This study analyzes

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Karimi, Mazaher, Mohammad Farshad, Qiteng Hong, Hannu Laaksonen, and Kimmo Kauhaniemi. "An Islanding Detection Technique for Inverter-Based Distributed Generation in Microgrids." Energies 14, no. 1 (2020): 130. http://dx.doi.org/10.3390/en14010130.

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This article proposes a new passive islanding detection technique for inverter-based distributed generation (DG) in microgrids based on local synchrophasor measurements. The proposed method utilizes the voltage and current phasors measured at the DG connection point (point of connection, PoC). In this paper, the rate of change of voltages and the ratio of the voltage and current magnitudes (VoI index) at the PoC are monitored using micro-phasor measurement units. The developed local measurements based decentralized islanding detection technique is based on the VoI index in order to detect any

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