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Journal articles on the topic 'Zero sequence component'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Paithankar, Y. G., and S. R. Bhide. "A Fast Method for Sequence Component Filtering." International Journal of Electrical Engineering & Education 40, no. 1 (2003): 66–71. http://dx.doi.org/10.7227/ijeee.40.1.7.

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In this paper a method to filter or segregate sequence components, using minimal hardware is presented. The method does not involve phase shifts other than that of 90 degrees. Thus it can be implemented using very simple hardware or if implemented in software will need considerably less amount of processing. The method consists in first separating the zero sequence component. Then the zero sequence component is subtracted from the input signal to get a signal which is sum of positive and negative sequence components. Further it is pointed out that difference between positive and negative seque

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2

Zeng, Xiao Hui, Yong Hui Chen, and Hong Song. "The Research on Directional Elements of High-Voltage Line Protections Based on Zero-Sequence Reactance of Fault Components." Advanced Materials Research 424-425 (January 2012): 511–15. http://dx.doi.org/10.4028/www.scientific.net/amr.424-425.511.

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Zero-sequence directional elements under a small voltage are studied and a new directional element based on zero-sequence reactance of fault components is presented. From analysis and simulations we have that when a forward fault or a reverse fault occurs, the zero-sequence reactance of a fault component will less or larger than the line zero-sequence reactance respectively. Therefore, the direction of a fault can be distinguished. The simulation results of EMTP show that the directional element based on zero-sequence reactance of fault components can identify forward and reverse faults accura

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3

Yan, Xing, Chenghu Ma, and Hui Han. "Fault Line Selection with Correlation Analysis of Zero Sequence Current and Voltage under High-Low Frequency." Journal of Physics: Conference Series 2310, no. 1 (2022): 012024. http://dx.doi.org/10.1088/1742-6596/2310/1/012024.

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Abstract When a single-phase ground fault occurs near the zero or maximum point, the fault line selection of resonance grounding system is not sensitive enough. After analyzing the transient current and line impedance characteristics of zero sequence network, and making full use of the decaying DC component, power frequency component and high frequency component of the transient zero sequence current of the feeder, a fault line selection method based on correlation analysis of zero sequence current and bus zero sequence voltage derivative in high and low frequency band is proposed. The effecti

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4

Feng, Guoli, Zhihao Ye, Yihui Xia, Liming Huang, and Zerun Wang. "Impedance Modeling and Stability Analysis of Three-Phase Four-Wire Inverter with Grid-Connected Operation." Energies 15, no. 8 (2022): 2754. http://dx.doi.org/10.3390/en15082754.

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With the continuous penetration and development of renewable energy power generation, distributed grids and microgrids are becoming increasingly important in power systems. In the distribution networks and microgrids, the grid impedance is comparatively large and cannot be ignored. Usually, the parallel compensation is used to improve the grid quality. In these three-phase four-wire power systems, analyzing the impedance characteristics of the grid-connected inverter is vital to carry out the small-signal stability analysis. Thus, it is vital to consider the influence of the zero-sequence comp

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5

O A., Ezechukwu. "INSTABILITY PROBLEM OF CONVENTIONAL TRANSFORMER DIFFERENTIAL PROTECTION-APPLICATION OF ZERO SEQUENCE CURRENT TRAP." INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY 10, no. 4 (2013): 1563–68. http://dx.doi.org/10.24297/ijct.v10i4.3257.

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Zero sequence component of current usually causes instability of the differential protection. It enters circuits through earthed terminals. The traditional way of solving the problem in differential schemes is by connecting the interposing current transformers (ICTs) in delta since there is no path for zero sequence component of current in delta. This paper suggests another way of dealing with the problem. A zero sequence trap is modeled to pass the zero sequence current through an output logic which ensures that operation of the relay is enabled only when there is a real differential fault.

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6

Shao, Wenquan, Jie Bai, Yuan Cheng, Zhihua Zhang, and Ning Li. "Research on a Faulty Line Selection Method Based on the Zero-Sequence Disturbance Power of Resonant Grounded Distribution Networks." Energies 12, no. 5 (2019): 846. http://dx.doi.org/10.3390/en12050846.

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For fast and accurate faulty line selection (FLS) in single phase-to-ground (SPG) faults for resonant grounded distribution networks (RGDNs), this paper proposes a FLS method based on zero-sequence power characteristics. Through analysis of the zero-sequence current of SPG faults, it is found that the transient zero-sequence current in the faulty line contains abundant attenuated DC components, while that in the sound line is weak, which could be utilized as a technically practical way of judging faulty lines. Thus a FLS scheme using a transient zero-sequence DC component energy integral is pu

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7

Tang, Haiguo, Lingchao Kong, and Yong Wang. "A Novel Analysis of the Influence of Zero-Axis Control on Neutral-Point Potential Self-Balancing of Three-Level Converters." Electronics 13, no. 23 (2024): 4657. http://dx.doi.org/10.3390/electronics13234657.

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The neutral-point potential balance issues in three-level converters have obtained great attention. The popular view thinks that the neutral-point voltage deviation can be suppressed by regulating the injected zero-sequence component, whether via carrier modulation or space vector modulation techniques. However, this paper presents a novel finding: the efficacy of different frame controllers on the self-balancing of neutral-point potential in three-level converters differs when a comprehensive analysis of zero-sequence dynamics, including neutral-point current and PWM modulation, is conducted.

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8

Tian, Shu, Jin Peng He, and Yu Zheng. "The Research Based on Zero Sequence Energy to the Line Selection in Distribution Network." Advanced Materials Research 614-615 (December 2012): 846–49. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.846.

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When single phase-to-ground fault happened in power network with arc suppression coil grounded, capacitor current through fault point is compensated and reduced by installing arc suppression coil. Zero-sequence current’s amplitude and phase of fault lines and sound lines are so similar that it increases the difficulty of selecting the fault line. But the resistance component of zero sequence current has no relationship with the arc extinguishing coil compensation, absolute value of resistance component to the fault lines show the maximum, and zero sequence current’s polarity of fault lines is

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9

Lv, Kangfei, Xinwei Dong, and Cong Zhu. "Research on Fault-Tolerant Operation Strategy of Permanent Magnet Synchronous Motor with Common DC Bus Open Winding Phase-Breaking Fault." Energies 15, no. 8 (2022): 2927. http://dx.doi.org/10.3390/en15082927.

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In some key areas, fault-tolerant control is usually needed in order to enable the motor to operate continuously in fault mode. Given that it is difficult to detect the zero-sequence current of the open winding permanent magnet synchronous motor after the phase break fault occurs, the traditional zero-sequence current suppression strategy is no longer applicable after the phase break fault occurs. Therefore, a zero-sequence current suppression strategy for a common DC bus under a phase break fault is proposed in this paper. By establishing the mathematical model between the current component i

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10

Gao, Li, and Hong Chun Shu. "Feasibility Study on the Fault Line Selection Method Based on Overall Trend of Zero Sequence Current." Applied Mechanics and Materials 341-342 (July 2013): 1235–38. http://dx.doi.org/10.4028/www.scientific.net/amm.341-342.1235.

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Two results were obtained by analysing electromagnetism transition condition: firstly, when the initial phase angle of fault is larger, the characteristic of travelling wave is obvious, and the polarity of the first travelling wave head is consistent with the overall trend of zero sequence current in preliminary stage; secondly, when the initial phase angle of fault is smaller, the characteristic of travelling wave is not obvious, but the fault lines and perfect lines can be recognized through the direction of decaying direct current component in zero sequence current, and the direction of dec

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11

Xu, Feng, Xiaoming Huang, Yi Lu, and Zheren Zhang. "AC Fault Ride-Through Strategy of a Transformerless Soft Normally Open Point." Applied Sciences 12, no. 13 (2022): 6773. http://dx.doi.org/10.3390/app12136773.

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This paper focuses on the soft normally open point (SNOP) which has no transformers and connects to the 10 kV distribution network through the arc suppression coil grounding mode. A mathematical model containing positive-, negative-, and zero-sequence components under AC fault is established by the circuit analysis and the sequence component decomposition. Then the voltage fluctuation mechanism at the DC side and the non-fault AC side caused by the zero-sequence voltage on the fault side is analyzed under the case without transformers. Taking the single-phase grounding fault as an example, the

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12

He, Qian, Gong He, Zheng Li, Meichen Lin, Gexiang Zhang, and Xuedong Li. "Pilot Protection Based on Zero-Sequence Current Resistance-Capacitance Component for Large-Scale Inverter-Interfaced Power Stations." Sustainability 14, no. 20 (2022): 13268. http://dx.doi.org/10.3390/su142013268.

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At present, zero-sequence current protection is generally used as the main protection for single-phase ground faults in resistance-grounded inverter power stations. However, limited by the principle, it is difficult for current protection to take into account selectivity and rapid action when the neutral point resistance is large, so there is protection mismatch with the inverter-type power supply for low voltage ride through leads to the risk of large-scale disconnection of non-fault lines. Aiming at the above problems, firstly, a fault analysis model of the inverter power station considering

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13

Huang, Ziqi, Xing Zhao, Weiyu Wang, and Shuangxia Niu. "Hybrid Reluctance Machine with Skewed Permanent Magnets and Zero-Sequence Current Excitation." Energies 15, no. 22 (2022): 8384. http://dx.doi.org/10.3390/en15228384.

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The reluctance machine is a potential candidate for electrical vehicle propulsion because of its reliable structure, low cost, flexible flux regulation ability, and wide speed range. However, the torque density is unsatisfactory because of the poor excitation ability and low stator core utilization factor. To solve this problem, in this paper, a novel hybrid reluctance machine (HRM) with the skewed permanent magnet (PM) and the zero-sequence current is proposed for electric vehicles. The skewed PM has two magnetomotive force (MMF) components with different functions. The radial MMF component p

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14

Feng, Guoli, Zhihao Ye, Yihui Xia, Heng Nian, Liming Huang, and Zerun Wang. "High Frequency Resonance Suppression Strategy of Three-Phase Four-Wire Split Capacitor Inverter Connected to Parallel Compensation Grid." Energies 15, no. 4 (2022): 1486. http://dx.doi.org/10.3390/en15041486.

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With the continuous penetration and development of renewable energy power generation, the distributed grid and the microgrid are becoming increasingly important in modern power systems. In distribution networks and the microgrid, the grid impedance is comparatively large and cannot be ignored. Usually, the parallel compensation is used to improve the grid quality. In the grid with parallel compensation, the large phase angle difference between the impedance of the grid-connected inverter and the impedance of the grid at amplitude intersection will result in high frequency resonance (HFR). Beca

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15

Wen, Ning, Hui Sun, Zhi Cheng Zhang, and Jin Tao Dai. "Research on STATCOM control strategy of Cascaded H-bridge considering unbalanced conditions." Journal of Physics: Conference Series 2338, no. 1 (2022): 012083. http://dx.doi.org/10.1088/1742-6596/2338/1/012083.

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Abstract STATCOM, a star cascade H bridge, usually uses zero-sequence voltage injection to achieve inter-phase DC voltage balance. Different from negative sequence current injection, the phase-to-phase DC voltage balance control based on zero sequence voltage injection does not generate zero sequence current in three-phase and three-wire systems, which is beneficial to the power quality of the system. In the traditional control algorithm, the zero sequence voltage is calculated by the unbalanced active power and current. The control algorithm contains a large number of complex operations and m

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16

Sun, Xia, and Li Zhou. "Line Selection Device Based on Double Tree Complex Wavelet." Advanced Materials Research 823 (October 2013): 505–8. http://dx.doi.org/10.4028/www.scientific.net/amr.823.505.

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Single phase ground fault has the highest rate to happen in distribution network, use the method based on transient component can improve line selection accuracy effectively. sensitivity and directional selectivity can improved by using dual tree complex wavelet transform than using discrete wavelet translation, there is a decaying current fault line and normal line of difference, the difference is phase to phase delay reflected in current after wavelet transformation , the fault line and normal line zero sequence current and zero sequence current proportion relationship, there still worse a d

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17

Wang, Fu Sheng, Xiao Fei Wang, Zhang Ping Shao, and Xing Zhang. "Zero-Sequence Circulating Current Reduction for Three-Phase Three-Level Modular Photovoltaic Grid-Connected System." Applied Mechanics and Materials 339 (July 2013): 539–44. http://dx.doi.org/10.4028/www.scientific.net/amm.339.539.

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An equivalent model is established for zero-sequence circulating current (ZSCC) in three-phase three-level modular photovoltaic grid-connected system, and ZSCC is classified by frequency into high-frequency and low-frequency components. A parallel solution based on improved LCL filter is proposed to reduce high frequency component of ZSCC, and the low-frequency component of ZSCC can be reduced by using the ZSCC controller. The ZSCC model analysis and reduction methods are verified by experimental results based on a 10 kW three-phase three-level modular photovoltaic grid-connected system.

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18

Duda, Arkadiusz, and Piotr Drozdowski. "Induction Motor Fault Diagnosis Based on Zero-Sequence Current Analysis." Energies 13, no. 24 (2020): 6528. http://dx.doi.org/10.3390/en13246528.

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This paper presents some considerations regarding the application of the stator zero-sequence current component (ZSC) in the fault detection of cage induction machines, including the effects of magnetic core saturation. Faults such as rotor cage asymmetry and static, dynamic, and mixed eccentricity were considered. The research started by developing a harmonic motor model, which allowed us to obtain a voltage equation for the zero-sequence current component. The equation allowed us to extract formulas of typical frequencies for particular fault types. Next, in order to verify the effectiveness

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19

Khanal, Bibek, Kulchandra Bhattarai, Lenish Shrestha, Aashish Dahal, and Indraman Tamrakar. "Modeling of Grid Tied PV Inverter to Improve its Performance During Unbalanced Load and Unbalance Fault." KEC Journal of Science and Engineering 8, no. 1 (2024): 94–102. http://dx.doi.org/10.3126/kjse.v8i1.69275.

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Integrating solar through inverter brings about various challenges in the microgrids and the inverter itself. This paper aims to the study of problems in the operation of inverter during unbalance load and unbalance fault condition along with the possible control measures to mitigate those problems to ensure the safe and reliable operation of the inverter. A grid connected PV inverter is modeled using hysteresis band controller and implementing the MPPT of the PV system with the buck boost converter. During unbalance load and unbalance fault condition, the negative and zero sequence components

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20

Bialobrzheskyi, O., A. Postil, and S. Yakimets. "Accounting for a positive, negative and zero sequences power in a three-phase unbalanced electrical system." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 6 (December 23, 2023): 93–99. http://dx.doi.org/10.33271/nvngu/2023-6/093.

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Purpose. Based on the instantaneous electrical power of a three-phase asymmetric system of sinusoidal periodic current, to determine positive, negative, zero-sequences active and reactive power, as well as invariance power factor. Methodology. In the unbalance case in three-phase electrical system, the electrical energy quality is evaluated by means on voltage and current positive, negative, zero-sequences. At the same time, similar components of active and reactive power have not received practical distribution. But it is precisely in terms of power that electricity is accounted for. The inst

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21

Guo, Linyun, Qiong Wu, Zehong Yuan, and Zhaoyu Tao. "Grounding fault test technology of distribution network based on zero sequence power direction judgment." Journal of Physics: Conference Series 2246, no. 1 (2022): 012056. http://dx.doi.org/10.1088/1742-6596/2246/1/012056.

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Abstract Distribution network grounding fault testing technology relies on a single criterion, which has a positioning blind area, resulting in large ranging error. In this paper, a grounding fault test technology for distribution network based on zero sequence power direction determination is proposed. The direction from the power supply side to the load terminal is specified as the positive direction of the network, the fault equivalent zero sequence current is modeled, and the high-frequency component of transient zero sequence current containing main fault characteristics is extracted. The

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22

He, Jianbo, Yao Zhou, Yilin Li, et al. "Characteristic Quantity Analysis of Single-Phase Contact Tree Ground Fault of Distribution Network Overhead Lines." Energies 17, no. 1 (2023): 132. http://dx.doi.org/10.3390/en17010132.

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When the overhead line passes through the forest area, the conductor may contact the line to induce the tree-contact single-phase-to-ground fault (TSF), and the persistence of TSF may induce wildfires, bringing serious consequences. However, the amount of TSF electrical features is weak, and traditional protection devices cannot operate effectively, so it is urgent to obtain typical characteristics of TSF. In this study, the simulation experiment is carried out for the tree-contact single-phase-to-ground fault. Firstly, the relativity between fault and characteristics like zero-sequence voltag

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23

Dr., M. Mohammadha Hussaini, and G. Sureshkumar. "SPWM Triggered AC Voltage Controller for the Reduction of Lower Order Harmonics." Journal of Power Electronics and Drives 5, no. 1 (2020): 28–54. https://doi.org/10.5281/zenodo.3955720.

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Power electronic controllers are the major harmonic producing components. Lower order harmonics are very dangerous for transformers, induction motors, generators and other equipment’s. The filter design for the lower order harmonics is also a complex one. So the best way for the reduction of lower order harmonics is using pulse width modulation technique. The main abstract is to reduce the lower order and triplen harmonics which produce zero sequence components. The Crawling can be reduced using the PWM ac voltage controller. Third order harmonics is constant for all modulation index in

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24

Han, Yanzan, and Jimeng Zhang. "Recognition Algorithm of Transient Overvoltage Characteristic Based on Symmetrical Components Estimation." Symmetry 12, no. 1 (2020): 114. http://dx.doi.org/10.3390/sym12010114.

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The recognition of transient overvoltage characteristics is the premise of disturbance compensation of the transient overvoltage. Based on that, the recognition algorithm of transient overvoltage characteristics based on symmetrical components estimation was proposed. The generation mechanism of the transient overvoltage in gas insulated switchgear (GIS) was analyzed. Then, the transient overvoltage was measured via the capacitive sensor method. The three-phase voltage of ultra-high voltage grid was asymmetrical when the transient overvoltage appeared. At present, the asymmetrical three-phase

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V., F. Syvokobylenko, and A. Lysenko V. "IMPROVING THE EFFICIENCY OF FAULT PROTECTION SYSTEMS OF ELECTRICAL GRIDS BASED ON ZERO SEQUENCE VOLTAGES AND CURRENTS WAVELET TRANSFORMS." Electrical engineering & electromechanics, no. 4 (August 21, 2020): 67–72. https://doi.org/10.20998/2074-272X.2020.4.09.

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<strong><em>Introduction.</em></strong><em> A significant proportion of earth faults in medium voltage networks represents a short-lived and transient process. <strong>Problem.</strong> In such cases, earth fault protection that responds to steady-state current and voltage is not able to operate properly. <strong>Purpose.</strong> To develop earth faults protection selective algorithm using transient components, that occur in zero-sequence currents and voltage in the fault process. <strong>Method.</strong> A mathematical model of the power supply system was a

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26

Vianna, J. T. A., L. R. Araujo, and D. R. R. Penido. "High Impedance Fault Area Location in Distribution Systems Based on Current Zero Sequence Component." IEEE Latin America Transactions 14, no. 2 (2016): 759–66. http://dx.doi.org/10.1109/tla.2016.7437220.

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Rosli, S. J., H. A. Rahim, and K. N. Abdul Rani. "Design of amplitude and phase modulated pulse trains with good auttocorrelation properties for radar communications." Indonesian Journal of Electrical Engineering and Computer Science 13, no. 3 (2019): 990. http://dx.doi.org/10.11591/ijeecs.v13.i3.pp990-998.

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Development of technique for synthesizing multilevel sequences with good correlation properties is very useful for several radar applications where as a set of phase and amplitude coded sequences will be synthesized directly for compression technique. In reality, the signal processing also been significant to transmit or store signals, to enhance desired signal component and to extract useful information carried by signals. Consequently, this paper describes affectively methods to generating the finite length multilevel sequence of any length that have low side lobe energy (SLE) and improved e

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S., J. Rosli, A. Rahim H., and N. Abdul Rani K. "Design of amplitude and phase modulated pulse trains with good auttocorrelation properties for radar communications." Indonesian Journal of Electrical Engineering and Computer Science 13, no. 3 (2019): 990–98. https://doi.org/10.11591/ijeecs.v13.i3.pp990-998.

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Development of technique for synthesizing multilevel sequences with good correlation properties is very useful for several radar applications where as a set of phase and amplitude coded sequences will be synthesized directly for compression technique. In reality, the signal processing also been significant to transmit or store signals, to enhance desired signal component and to extract useful information carried by signals. Consequently, this paper describes affectively methods to generating the finite length multilevel sequence of any length that have low side lobe energy (SLE) and improved e

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Nlend, Samuel, and Theo G. Swart. "Multiple Access Interference Bit Error Rate Evaluation Technique for Direct Detection FFH-OCDMA Bragg Gratings Based Channels." ECTI Transactions on Electrical Engineering, Electronics, and Communications 21, no. 3 (2023): 251467. http://dx.doi.org/10.37936/ecti-eec.2023213.251467.

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This paper proposes a more realistic optical code division multiple access (OCDMA) sequence bit error rate (BER) evaluation technique for multiple access interference (MAI) during transmission over optical fiber. The technique provides a filter for all possible non-zero correlations events that may occur during transmission, leaning on all positive time-frequency intervals for a 2-D OCDMA, or all positive time intervals for 1-D OCDMA. As a wavelength hopping/time sequence (WH/TS) suggests, this MAI evaluation on a 2-D OCDMA consists of one-coincidence frequency hopping code optical orthogonal

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Wang, Ting, Kun Chen, Kanjun Zhang, Longen Zhang, and Xingyang Hu. "Research and analysis on suppression and influence of transformer direct current bias." Journal of Physics: Conference Series 2369, no. 1 (2022): 012049. http://dx.doi.org/10.1088/1742-6596/2369/1/012049.

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DC bias generates a large DC component in the windings of the transformer in operation, thereby generating harmonics, causing vibration, noise, and overheating. In severe cases, it can cause damage to the transformer, which will affect the safe and stable operation of the AC system. This article takes the DC bias of the main transformer of a 220kV substation as an example, and uses the capacitance isolation method to suppress the DC bias. Due to the addition of capacitor equipment at the neutral point, the zero-sequence impedance of the main transformer and the change of the zero-sequence impe

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Zhou, Jinyu, Shuping Gao, and Zhanshe Yang. "Pilot protection based on current sequence component differences for offshore wind power low-frequency transmission line." Journal of Physics: Conference Series 3011, no. 1 (2025): 012027. https://doi.org/10.1088/1742-6596/3011/1/012027.

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Abstract The various control strategies used by the inverters in the offshore wind power low-frequency transmission system will result in variations in the current composition at the two ends. These variations will raise the phase angle difference of the same-phase fault currents, decreasing the protection system’s sensitivity and possibly causing it to fail. To solve this problem, the study proposes to construct a new protection criterion using zero-sequence currents and negative-sequence currents, which can more accurately identify and differentiate between normal operation states and fault

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V., F. Syvokobylenko, та A. Lysenko V. "МULTIFREQUENCY PROTECTING METHOD AGAINST EARTH-FAULTS OF PHASE IN THE COMPENSATED ELECTRIC NETWORKS". Electrical engineering & electromechanics, № 1 (19 лютого 2020): 56–60. https://doi.org/10.20998/2074-272X.2020.1.09.

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<strong><em>Introduction.</em></strong><em> A significant proportion of earth faults in 6 - 35 kV networks is a transient and short-lived process, which is followed by an electric arc. <strong>Problem. </strong>In such cases, earth-fault protection that responds to steady-state current and voltage is not able to operate properly. Also, the use of the Petersen coil to compensate for the capacitive earth fault current complicates the protection function because it significantly reduces the single phase earth fault current in steady state. <strong>Purpose.</strong> To dev

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Baransky, Vitaly A., and Tatiana A. Senchonok. "ON SEQUENCES OF ELEMENTARY TRANSFORMATIONS IN THE INTEGER PARTITIONS LATTICE." Ural Mathematical Journal 9, no. 2 (2023): 36. http://dx.doi.org/10.15826/umj.2023.2.003.

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An integer partition, or simply, a partition is a nonincreasing sequence \(\lambda = (\lambda_1, \lambda_2, \dots)\) of nonnegative integers that contains only a finite number of nonzero components. The length \(\ell(\lambda)\) of a partition \(\lambda\) is the number of its nonzero components. For convenience, a partition \(\lambda\) will often be written in the form \(\lambda=(\lambda_1, \dots, \lambda_t)\), where \(t\geq\ell(\lambda)\); i.e., we will omit the zeros, starting from some zero component, not forgetting that the sequence is infinite. Let there be natural numbers \(i,j\in\{1,\dot

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Zhu, Xu Ping. "Analysis of SVPWM with Minimum Switching Losses for Multi-Modular Converter." Applied Mechanics and Materials 433-435 (October 2013): 1298–306. http://dx.doi.org/10.4028/www.scientific.net/amm.433-435.1298.

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The classic voltage space vector PWM (SVPWM) is a kind of symmetrical regular-sampled PWM with zero sequence component added to its modulating wave. The technique of carrier phase shifted SPWM (CPS-PWM), which combines the multilevel with SPWM technique, is characteristic of high equivalent switching frequency of the output wave. A technique named sample time staggered SVPWM which combines SVPWM with CPS-PWM is presented in this paper. In order to reduce the maximum switching current, the zero sequence component added into the individual converter units can be adjusted dynamically according to

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Jian, Le, Wang Cao, Yang Jintao, and Wang Yinge. "Reference voltage calculation method based on zero-sequence component optimisation for a regional compensation DVR." International Journal of Electronics 105, no. 4 (2017): 659–78. http://dx.doi.org/10.1080/00207217.2017.1382008.

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Lazarenko, Karyna, and Ihor Chyzh. "FOUR-COMPONENT ZOOM-AFOCAL SYSTEMS ZOOM-TRANSFOCACATORS OF THREAD RANGE METERS." Bulletin of Kyiv Polytechnic Institute. Series Instrument Making, no. 66(2) (December 27, 2023): 36–42. http://dx.doi.org/10.20535/1970.66(2).2023.294951.

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The problem addressed in this research is the parametric synthesis of zoom-afocal optical systems for transfocusors used in measurement technology, specifically thread-type rangefinders. The research aims to develop a universal analytical algorithm that can be computerized for calculating the optical and dimensional parameters of four-component zoom-afocal lens systems for trans-focusors.The implementation methodology involves representing the zoom-afocal system as a sequence of thin components.Using a system of equations where the optical powers of the components and the distances between the

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LAVRELASHVILI, GEORGE. "FERMIONS IN THE BACKGROUND OF DILATONIC SPHALERONS." Modern Physics Letters A 09, no. 40 (1994): 3731–39. http://dx.doi.org/10.1142/s0217732394003580.

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We discuss the properties and interpretation of a discrete sequence of a static spherically symmetric solutions of the Yang-Mills dilaton theory. This sequence is parametrized by the number of zeros, n, of a component of the gauge field potential. It is demonstrated that solutions with odd n possess all the properties of the sphaleron. It is shown that there are normalizable fermion zero modes in the background of these solutions. The question of instability is critically analyzed.

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Yamashika, Herris, and Syafii Syafii. "Characteristics of symmetrical components for high impedance faults in distribution networks with photovoltaic inverters." Indonesian Journal of Electrical Engineering and Computer Science 33, no. 2 (2024): 727. http://dx.doi.org/10.11591/ijeecs.v33.i2.pp727-735.

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This work models a photovoltaic (PV) inverter connected to an IEC microgrid system. The purpose of this study was to find the characteristics of symmetrical components before and after a high impedance single phase short-circuit fault. The IEC microgrid system is tailored to the distribution system in Indonesia, where the applied voltage is 20 kV. Only parameters related to the short-circuit study are included in the model. A second-order generalized integrator frequency-locked-loop is utilized to represent the 3-phase PV inverter. The inverter model, previously treated as an ideal current sou

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Yamashika, Herris, and Syafii. "Characteristics of symmetrical components for high impedance faults in distribution networks with photovoltaic inverters." Indonesian Journal of Electrical Engineering and Computer Science 33, no. 2 (2024): 727–35. https://doi.org/10.11591/ijeecs.v33.i2.pp727-735.

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This work models a photovoltaic (PV) inverter connected to an IEC microgrid system. The purpose of this study was to find the characteristics of symmetrical components before and after a high impedance single phase short-circuit fault. The IEC microgrid system is tailored to the distribution system in Indonesia, where the applied voltage is 20 kV. Only parameters related to the short-circuit study are included in the model. A second-order generalized integrator frequency-locked-loop is utilized to represent the 3-phase PV inverter. The inverter model, previously treated as an ideal current sou

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Drozdowski, Piotr, and Arkadiusz Duda. "Influence of magnetic saturation effects on the fault detection of induction motors." Archives of Electrical Engineering 63, no. 3 (2014): 489–506. http://dx.doi.org/10.2478/aee-2014-0035.

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Abstract In this paper, the influence of impact damage to the induction motors on the zero-sequence voltage and its spectrum is presented. The signals detecting the damages result from a detailed analysis of the formula describing this voltage component which is induced in the stator windings due to core magnetic saturation and the discrete displacement of windings. Its course is affected by the operation of both the stator and the rotor. Other fault detection methods, are known and widely applied by analysing the spectrum of stator currents. The presented method may be a complement to other m

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Hao, Wen Jing, Li Cai Zhang, and Yan Ni Wang. "Cross-Diamond Search Algorithm for Motion Estimation Based on Projection." Advanced Materials Research 433-440 (January 2012): 3713–17. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.3713.

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According to the time and space distribution of the video sequence image motion vector and the fact that the horizontal component of the non-zero motion vector is often more than the vertical component, this paper presents a cross-diamond search algorithm for motion estimation based on projection from studying the pre-judgment zero motion vector, the starting point of search prediction, the movement type determinant, search strategy formulation and other aspects. The algorithm ensures the image quality basically unchanged. In this case, the search speed of the proposed algorithm speeds up 95-2

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Urresty, Julio-César, Jordi-Roger Riba, and Luís Romeral. "Application of the zero-sequence voltage component to detect stator winding inter-turn faults in PMSMs." Electric Power Systems Research 89 (August 2012): 38–44. http://dx.doi.org/10.1016/j.epsr.2012.02.012.

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Yang, Ying, Xiao Wei Tu, and Zhi Xuan Yu. "New Implementation of Position Sensorless Control Based on the AC Component of SNP for Brushless DC Motor." Advanced Materials Research 614-615 (December 2012): 1190–94. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.1190.

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Zero-crossing detection with voltage comparator in position detection method based on the AC component of Supposing Neutral Point(SNP) induced sensitivity to noise. In this paper, it is proposed that the ASIC ML4425 should integrate AC component instead of the terminal voltage and phase-locked loop(PLL) was used to determine the proper commutation sequence for the BLDC motor. Basic principle and implementation of the ASIC-based sensorless controller will be presented and experiments will be given to verify the control strategy.

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Liu, Hejin, Linli Zhang, Min Hang, and Lisheng Li. "Fault line selection algorithm for single-phase high-impedance ground faults in distribution networks based on the hilbert-huang transform." Journal of Physics: Conference Series 2803, no. 1 (2024): 012037. http://dx.doi.org/10.1088/1742-6596/2803/1/012037.

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Abstract High-impedance faults in distribution networks have stable characteristics, making them difficult to identify. This paper proposes a fault line selection algorithm for single-phase high-impedance ground faults in distribution networks based on the Hilbert-Huang Transform. The Hilbert-Huang Transform analysis method is used to distinguish fault lines. The first intrinsic mode function component obtained from the decomposition of the zero-sequence current within several cycles after the fault is subjected to a Hilbert Transform, yielding the HHT spectrum peak values. These are then comb

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Naumov, Igor, and Sergey Podyachikh. "REDUCING LOSSES AND IMPROVING POWER QUALITY IN ELECTRIC GRIDS OF INDIVIDUAL HOUSEHOLDS." Elektrotekhnologii i elektrooborudovanie v APK 71, no. 4 (2024): 19–30. https://doi.org/10.22314/2658-4859-2024-71-4-19-30.

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Reliable and high-quality power supply to individual households is an indispensable condition for ensuring the normal functioning of citizens. (Research purpose) The research purpose is studying the quality and loss of electrical energy in the internal electrical grids of an individual residential building based on real measurements at different times, creating a simulation model of integration into this electrical grid of specialized technical means to improve the quality and reduce losses of electrical energy. (Materials and methods) Used as the main author's method for calculating the symme

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Liu, Yang, Zhang Bao Chen, and Lin Ye. "A New Detection Way for Single- Phase to Ground Fault Based on Energy Function Intergral and Wavelet Packets." Applied Mechanics and Materials 217-219 (November 2012): 2629–33. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.2629.

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In order to find new fault line selection method of single-phase distribution network, First parallel resistance in the neutral point in order to increase the transient component of the fault line, obtained the line energy after the failure through the integral transform , initially selected probable fault lines , on this basis, decompose all the transient zero sequence currents in every line by separation based on nicer separate frequency characteristic of wavelet packets, to accurately determine the greatest fault line by the characteristic that the value of second singular point generated b

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Orlov, Aleksandr I., Il’ya A. Karpov, and Vera T. Sidorova. "ANALYSIS OF SYMMETRICAL ELECTROMAGNETIC APPARATUS FOR THREE-PHASE ZERO-WIRE NETWORKS." Vestnik Chuvashskogo universiteta, no. 4 (December 25, 2024): 84–97. https://doi.org/10.47026/1810-1909-2024-4-84-97.

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The most common problems of electricity quality in 0.4 kV power transmission lines are voltage deviations and voltage asymmetry, which are clearly manifested at the end sections of long lines with uneven distribution of consumers by phases. The technical means of solving these problems include devices for the uniform distribution of 1-phase consumers across the phases of a 3-phase network based on electromechanical relays, static semiconductor devices and electromagnetic devices. The purpose of the article is to analyze the operation of a symmetrical electromagnetic apparatus consisting of one

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Yu, Shengqi, and Jie Liu. "Nonuniform Dependence of a Two-Component NOVIKOV System in Besov Spaces." Mathematics 11, no. 9 (2023): 2041. http://dx.doi.org/10.3390/math11092041.

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Considered herein is the Cauchy problem of the two-component Novikov system. In the periodic case, we first constructed an approximate solution sequence that possesses the nonuniform dependence property; then, by applying the energy methods, we managed to prove that the difference between the approximate and actual solution is negligible, thus succeeding in proving the nonuniform dependence result in both supercritical Besov spaces Bp,rs(T)×Bp,rs(T) with s>max{32,1+1p},1≤p≤∞,1≤r<∞ and critical Besov space B2,132(T)×B2,132(T). In the non-periodic case, we constructed two sequences of init

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Siton, Yarden, Vladimir Yuhimenko, Dmitry Baimel, and Alon Kuperman. "Baseline for Split DC Link Design in Three-Phase Three-Level Converters Operating with Unity Power Factor Based on Low-Frequency Partial Voltage Oscillations." Machines 10, no. 9 (2022): 722. http://dx.doi.org/10.3390/machines10090722.

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The study sets a baseline for split DC link capacitance values and voltage set points in three-phase three-level AC/DC (or DC/AC) converters operating with unity power factor. In order to equalize the average values of partial DC link voltages, the controller generates a zero-sequence containing DC components only while employing neither dedicated DC link capacitance balancing hardware nor high-order zero-sequence component injection. Such a baseline is required in order to evaluate the effectiveness of different DC link capacitance reduction methods proposed in the literature. Unlike most pre

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Kim, Jae-Myeong, Geum-Seop Song, and Jae-Jung Jung. "Zero-Sequence Voltage Injection Method for DC Capacitor Voltage Balancing of Wye-Connected CHB Converter under Unbalanced Grid and Load Conditions." Energies 14, no. 4 (2021): 1019. http://dx.doi.org/10.3390/en14041019.

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Leg capacitor energy balancing control is one of the crucial issues for stable operation of a cascaded H-bridge (CHB) converter. Because this topology inherently consists of numerous submodule cells with DC capacitors, the cell voltages and leg capacitor energy instantaneously fluctuate depending on operation sequence of the CHB converter. In general, a wye-connected CHB-converter-based static synchronous compensator (STATCOM) utilizes a zero-sequence voltage component for leg capacitor energy balancing. In this paper, to improve the dynamics of leg energy balancing control, a feedforward calc

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