Traveling Wave Fault Location Detection Technique for High Voltage Transmission Lines

Ngwenyama, M. K.; Roux, Paul; Ngoma, Louwrance

doi:10.1109/incet51464.2021.9456334

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…Equation (16) summarises and updates the variables in Equation ( 14). Wherein 𝑘 1 , 𝑘 2 , and 𝑘 3 represent complex algebraic expressions of a transmission line voltage, current, impedance, and supply impedances; thus, can be presented as follows:…”

Section: Eriksson Techniquementioning

confidence: 99%

A Novel Algorithm Design for Locating Fault Distances on HV Transmission Lines

Ngwenyama¹,

Roux²,

Ngoma³

2022

Adv. sci. technol. eng. syst. j.

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The transmission network has been considered among the globe's prevalent complex systems, comprised of hundreds of electrical transmission lines and other equipment used to transmit electrical energy from one location to another. Over a decade, power engineers have worked tirelessly to ensure that the transmission network operates reliably, transmitting electrical energy from the power station to the consumers without interruption. With growing generation capacity and the recent introduction of renewable energy systems (RES) such as wind turbines and solar energy, the transmission lines are increasingly being forced to run near their design limitations and greater unpredictability on the network operational configuration. As a result, the transmission network faces greater challenges than previously. As a worst-case scenario, large-scale electrical network power outages caused by electrical faults can disrupt electricity availability for several hours, impacting millions of customers and inflicting massive economic damage. These electrical faults must be repaired before electricity is restored to consumers. This necessitates a thorough grasp of the challenge and potential remedies to assure improved power efficiency. In the present work, an expansion of preceding work, a novel algorithm for estimating faults on transmission lines is presented. Impedance-based techniques are susceptible to producing errors or incorrect predictions. The presence of faults induced from high impedance sources produces an extra impedance to the ground, which negates the impedance calculation and produces errors in the distance to the fault. This results in inaccuracies that can affect a distance-to-fault estimation by 1-15 % of the overall line length. In this work, a design of a fault detection-location element (FDLE) algorithm is proposed. This algorithm relies on the dynamics of current and voltage signals on the transmission line while deserting impedance. Comparison research is undertaken against the impedancebased techniques to validate the proposed algorithm. Finally, the proposed algorithm findings are compared to fault location estimations using an impedance-based technique. Extensive trials on a simulated transmission line prove that the proposed algorithm is responsive to faults with an error as low as 1%, reaching a precision of 98.9%.

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Section: Eriksson Techniquementioning

confidence: 99%

A Novel Algorithm Design for Locating Fault Distances on HV Transmission Lines

Ngwenyama¹,

Roux²,

Ngoma³

2022

Adv. sci. technol. eng. syst. j.

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“…To monitor the condition of a cable line, methods are usu ally used where the line is disconnected from the network, such as the travelling wave method, where a pulse is launched into the line, and the reflected wave, by its shape and time of receipt, indicates the type of damage and approximate loca tion [1]. However, this solution is sometimes impossible due to certain reasons.…”

Section: Introductionmentioning

confidence: 99%

Cable line equivalent circuit parameters determination using the instantaneous power components

Bialobrzheskyi,

Todorov,

Postil

et al. 2024

Nauk. visn. nat. hirn. univ.

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Purpose. Development of a method for determining the cable line substitution scheme parameters based on the components of its instantaneous power. Methodology. Determination of unknown parameters of the cable line mode using the harmonic balance method. Determination of the U-shaped substitution scheme elements parameters is performed using power harmonics and their balance at the corresponding frequencies. For frequency-dependent elements, it is taken into account that the same power harmonic can be formed by different current and voltage harmonics. Findings. A method for determining the parameters of the cable line substitution scheme using the power components of its elements is proposed, which is distinguished by the fact that the total number of system equations for determining the parameters can be increased due to the use of power. The study of the proposed method for determining the cable line substitution scheme parameters based on the power components, based on the model compiled in the visual programming package, allowed us to establish that the largest parameter determination error is characteristic of active conduction. Originality. With the instantaneous power determination of the cable line substitution scheme reactive elements, it was found that during the calculation of the instantaneous power there is a peculiarity of taking into account the voltage harmonic number depending on the combination of harmonic numbers. Practical value. The proposed method can be developed on the sectioning of the U-shaped line substitution scheme to determine the change in the cable line substitution scheme parameters during its operation without disconnecting the line, unlike existing methods.

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