Voltage–current technique to identify fault location within long transmission lines

Abu-Siada, A.; Mosaad, Mohamed I.; Mir, Saif

doi:10.1049/iet-gtd.2020.1012

Cited by 14 publications

(9 citation statements)

References 21 publications

(22 reference statements)

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“…18). In particular, the proposed online method can be used for wood poles in the vicinity of vegetation that are prone to bushfire due to power line failures, insulator degradation, and termite activity [30,31]. The LC signal of in-field overhead line insulators can be measured using LC clamped sensor.…”

Section: Real-time Application Of the Proposed Methodsmentioning

confidence: 99%

Identification of Composite Insulator Criticality Based on a New Leakage Current Diagnostic Index

Palangar

Amin

Bakhshayesh

et al. 2021

IEEE Trans. Instrum. Meas.

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In this paper, a new method is proposed to identify the health condition of composite insulators through investigating the leakage current (LC) along with the electric potential (EP) and electric field stress (EFS) profiles. In this regard, variations of the LC harmonics and the distribution profiles of the EP and EFS are investigated through series of experimental and simulation analyses conducted on composite insulators under various environmental and pollution conditions. Fast Fourier Transform and COMSOL-Multiphysics environment are utilized to analyze this variation. Results reveal a strong correlation between the LC harmonics and the insulator health condition. A new diagnostic criticality index based on the third to the fifth harmonic ratio of the insulator LC is proposed to quantify the composite insulator criticality and predict the likelihood of flashover occurrence. The EP and EFS analysis can be used to provide a complimentary diagnosis to the insulator health state under severe pollution and humidity conditions. The proposed analysis enables the transmission line network operator to get an insight into the insulators' functional status and thus improving the network reliability through avoiding insulator failure and adopting a proper condition-based maintenance scheme.

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Section: Real-time Application Of the Proposed Methodsmentioning

confidence: 99%

Identification of Composite Insulator Criticality Based on a New Leakage Current Diagnostic Index

Palangar

Amin

Bakhshayesh

et al. 2021

IEEE Trans. Instrum. Meas.

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“…Step 3 requires the distributed CTs on the faulty feeder. Similar to phase measurement units (PMUs) [26], the low-cost distributed CTs may become another important component of smart grids. The number and spacing of distributed CTs can be defined by users according to fault experiences, which is flexible.…”

Section: Methods Engineering Implementationmentioning

confidence: 99%

“…In particular, references [26] and [29] obtained the Voltage-Current characteristic on transmission lines by the PMUs and digital image processing method, so as to locate the faults in transmission networks. Compared with them, the proposed method can locate the faults only by subtractions and plusminus sign comparisons using lower-cost transformers, so the proposed method in this paper is simpler.…”

Section: E Comparison With Existing Methodsmentioning

confidence: 99%

Single-Line-to-Ground Fault Location in Resonant Grounded Systems Based on Fault Distortions

Chen

Yin

et al. 2021

IEEE Access

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Under single-line-to-ground (SLG) faults, the voltages and currents in resonant grounded systems will inevitably be distorted. To locate the faults quickly and accurately, this paper proposes a location method based on fault distortions. The faulty phase is firstly detected according to the first SLG fault feature below, and then the faulty feeder and section are detected according to the second feature below. 1) On the bus, one of the following distortions occurs. One dropped faulty-phase voltage (FPV) and two raised normalphase voltages (NPVs). One dropped FPV and two NPVs (in which one rises and the other drops), where the product of FPV amplitude distortion and its phase-angle distortion is unique among three phase voltages. 2) On the faulty phase, the current on faulty feeder upstream rises, while the currents on faulty feeder downstream and normal feeders drop. Compared to existing methods, simulation tests show that the proposed method is robust under high impedance faults, and has a simple algorithm and easy engineering implementation. Also, it is effective under harmonics, three-phase imbalance, and different fault positions. INDEX TERMSFault distortions, fault location, single-line-to-ground faults, resonant grounded systems ACRONYMS SLG Single line to ground (F/N) PV (Faulty/Normal) phase voltage RGS Resonant grounded system ZSC Zero-sequence current FF (U/D) Faulty feeder (upstream/downstream) FPC Faulty phase current VFA Voltage fault area:

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“…(2) Where m in Figure 3 denotes the distances to a fault per unit [26], 𝑉 𝑆 the sending voltage, 𝑉 𝑅 the receiving voltage, 𝐼 𝑆 the sending current, 𝐼 𝑅 the receiving current, and 𝑍 𝐿 the impedance of the line.…”

Section: 𝐼𝑜 = (𝐼𝐴 + 𝐼𝐵 + 𝐼𝐶)/3mentioning

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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Voltage–current technique to identify fault location within long transmission lines

Cited by 14 publications

References 21 publications

Identification of Composite Insulator Criticality Based on a New Leakage Current Diagnostic Index

Identification of Composite Insulator Criticality Based on a New Leakage Current Diagnostic Index

Single-Line-to-Ground Fault Location in Resonant Grounded Systems Based on Fault Distortions

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

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