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Wyszukujesz frazę "fault location" wg kryterium: Temat

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    Wyświetlanie 1-7 z 7
    Tytuł:
    Faulted feeder identification and location for a single line-to-ground fault in ungrounded distribution system based on principal frequency component
    Autorzy:
    Liu, Ling
    Powiązania:
    https://bibliotekanauki.pl/articles/141574.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fault identification
    fault location
    single line-to-ground fault
    principal frequency component
    Opis:
    When a single line-to-ground fault occurs in the ungrounded distribution system, the steady-state fault current is relatively small for fault analysis and the transient fault current is observable, which can be used for faulted feeder identification and location. The principal frequency component retains most of the characteristics of the transient current. The principal frequency is related to the distance from the fault point to the substation and can be used for fault location. This paper analyzes the sequence network model of a single line-to-ground fault in the distribution network, and gives a method for principal frequency calculation. Depending on the characteristics of the maximum amplitude of the principal frequency component of the faulted feeder, the method of faulted feeder identification is given. Based on the complementary characteristics of the phase angle of the principal frequency component of the fault current and the phase angle at the substation bus, the faulted section location is carried out. MATLAB simulation is used to verify the effectiveness of the faulted feeder identification and location method.
    Źródło:
    Archives of Electrical Engineering; 2020, 69, 3; 695-704
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new method for estimating fault location in radial medium voltage distribution network only using measurements at feeder beginning
    Autorzy:
    Ngoc-Hung, Truong
    Powiązania:
    https://bibliotekanauki.pl/articles/24202735.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    characteristic equation
    distribution network
    fault location
    fault ranking index
    global search
    Opis:
    This paper proposes a new fault location method in radial medium voltage distribution networks. The proposed method only uses the measurement data at the feeder beginning to approximate the characteristic equation showing the dependence between the positive-sequence voltage and phase angle at the monitoring point with the distance to the fault location for each fault type on each line segment. To determine these characteristic equation coefficients, the entire distribution network will be modeled and simulated by four types of faults at different locations along the lines to build the initial database. Based on this database, the mathematical functions in MATLAB software are applied to approximate these coefficients corresponding to each type of fault for each line segment in the network. Then, from the current and voltage measurement data at the feeder beginning, the algorithms of global search, comparison, and fault ranking are used to find out where the fault occurs on the distribution network. Two types of distribution network with and without branches are studied and simulated in this paper to verify and evaluate the effectiveness of the proposed method.
    Źródło:
    Archives of Electrical Engineering; 2023, 72, 2; 503--520
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fault location technique using GA-ANFIS for UHV line
    Autorzy:
    Banu, G.
    Suja, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/141254.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    GA – ANFIS
    fault location
    Fault resistance
    one end data
    UHV line
    Opis:
    This paper presents an improved approach for locating and identifying faults for UHV overhead Transmission line by using GA-ANFIS. The proposed method uses one end data to identify the fault location. The ANFIS can be viewed either as a Fuzzy system, neural network or fuzzy neural network FNN. The integration with neural technology enhances fuzzy logic system on learning capabilities are proposed to analyze the UHV system under different fault conditions. The performance variation of two controllers in finding fault location is analyzed. This paper analyses various faults under different conditions in an UHV using Matlab/simulink. The proposed method is evaluated under different fault conditions such as fault inception angle, fault resistance and fault distance. Simulation results confirm that the proposed method can be used as an efficient for accurate fault location on the transmission line.
    Źródło:
    Archives of Electrical Engineering; 2014, 63, 2; 247-262
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    VSC-HVDC transmission line fault location based on transient characteristics
    Autorzy:
    Zhang, Yanxia
    Bi, Anlu
    Wang, Jian
    Zhang, Fuhe
    Lu, Jingyi
    Powiązania:
    https://bibliotekanauki.pl/articles/1841298.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    characteristic roots
    fault location
    identification of fault stages
    Prony algorithm
    VSC-HVDC
    Opis:
    Accurate and reliable fault location is necessary for ensuring the safe and reliable operation of the VSC-HVDC transmission system. This paper proposed a single-terminal fault location method based on the fault transient characteristics of the two-terminal VSCH-VDC transmission system. The pole-to-pole transient fault process was divided into three stages, the time-domain expression of the DC current during the diode freewheel stage was used to locate the fault point, and a criterion for judging whether the fault evolves to the diode freewheel stage was proposed. Taking into account the enhancing effect of the opposite system to the fault current, the DC side pole-to-ground fault networkwas equated to a fourth-order circuit model, the relationship of fault distance with the characteristic roots of fault current differential equationwas derived, and the Prony algorithmwas utilized for datafitting to extract characteristic roots to realize fault location. A two-terminal VSC-HVDC transmission system was modelled in PSCAD/EMTDC. The simulation result verifies that the proposed principle can accurately locate the fault point on the VSC-HVDC transmission lines.
    Źródło:
    Archives of Electrical Engineering; 2021, 70, 2; 381-398
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimal load distribution estimation for fault location in electric power distribution systems
    Autorzy:
    Menchafou, Y.
    Zahri, M.
    Habibi, M.
    El Markhi, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/140980.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electric power distribution systems
    fault location
    fictive load distribution
    load variation
    Opis:
    Accurate fault location in an electric power distribution system (EPDS) is important in maintaining system reliability. Diverse methods have been proposed in the past. These methods whither require measurements at each load point or use single-step loads compensation, which is hardly available in practical uses. In this paper, a simple technique to bypass the load problems is proposed. The method requires calculating an optimal load distribution using the total load seen from the substation (The rated power of distribution transformers) and the network topology. The optimal load distribution is used as a fictive distribution to replace the real unknown one in fault location (FL) algorithms. The effectiveness of the proposed technique is demonstrated using a mathematical formulation first, and next, by several simulations with a classic iterative fault location algorithm. The test results are obtained from the numerical simulation using the data of a distribution line recognized in the literature.
    Źródło:
    Archives of Electrical Engineering; 2017, 66, 1; 77-87
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A fault location method for hybrid transmission lines based on empirical Fourier decomposition
    Autorzy:
    Tao, Caixia
    Xing, Baosheng
    Li, Taiguo
    Powiązania:
    https://bibliotekanauki.pl/articles/27309957.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    empirical Fourier decomposition
    fault location
    hybrid lines
    Teager energy operator
    traveling wave method
    Opis:
    This paper aims to address the problems of inaccurate location and large computation in hybrid transmission line traveling wave detection methods. In this paper, a new fault location method based on empirical Fourier decomposition (EFD) and the Teager energy operator (TEO) is proposed. Firstly, the combination of EFD and the TEO is used to detect the time difference between the arrival of the initial traveling wave of the fault at the two measurement ends of the hybrid line. Then, when the fault occurs at the midpoint of each line segment and at the connection point of the hybrid line, the time difference between the arrival of the fault traveling wave at the two measurement ends of the line is calculated according to the line parameters. By comparing the obtained time differences, it is determined whether the fault occurs in the first or second half of the line. Finally, the fault distance is calculated using the double-ended traveling wave method according to the fault section. The model was built on PSCAD and the proposed algorithm was simulated on MATLAB platform. The results demonstrate that the proposed method achieves an average fault location accuracy of 98.88% by adjusting transition resistances and fault distances and comparing with other location methods. After validation, the proposed method for locating faults has a high level of accuracy in location, computational efficiency, and reliability. It can accurately identify fault segments and locations in hybrid transmission line systems.
    Źródło:
    Archives of Electrical Engineering; 2023, 72, 4; 1035--1053
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fault location of distribution network with distributed generation based on Karrenbauer transform and support vector machine regression
    Autorzy:
    Wang, Siming
    Zhao, Kaikai
    Powiązania:
    https://bibliotekanauki.pl/articles/24202729.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    distributed generation
    distribution network fault location
    fault type
    Karrenbauer transform
    agent prediction model
    SVR
    support vector regression
    Opis:
    As the capacity and scale of distribution networks continue to expand, and distributed generation technology is increasingly mature, the traditional fault location is no longer applicable to an active distribution network and "two-way" power flow structure. In this paper, a fault location method based on Karrenbauer transform and support vector machine regression (SVR) is proposed. Firstly, according to the influence of Karrenbauer transformation on phase angle difference before and after section fault in a low-voltage active distribution network, the fault regions and types are inferred preliminarily. Then, in the feature extraction stage, combined with the characteristics of distribution network fault mechanism, the fault feature sample set is established by using the phase angle difference of the Karrenbauer current. Finally, the fault category prediction model based on SVR was established to solve the problem of a single-phase mode transformation modulus and the indistinct identification of two-phase short circuits, then more accurate fault segments and categories were obtained. The proposed fault location method is simulated and verified by building a distribution network system model. The results show that compared with other methods in the field of fault detection, the fault location accuracy of the proposed method can reach 98.56%, which can enhance the robustness of rapid fault location.
    Źródło:
    Archives of Electrical Engineering; 2023, 72, 2; 461--481
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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