Performance evaluation of the travelling wave‐based differential protection when applied on Hybrid Transmission Lines

Lopes, Felipe V.; Ribeiro, Caio Muller S.; Ribeiro, João Paulo; Leite, Eduardo Jorge Silva

doi:10.1049/joe.2018.0232

Cited by 3 publications

(2 citation statements)

References 6 publications

(16 reference statements)

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“…This approach is based on the distinction between whether the time-domain differential is a first-order derivative The voltage and differential current satisfy the capacitance model [21], but the first derivative is significantly affected by higher harmonics, requiring improved performance. A traveling-wave-based pilot protection was put forward by the authors in [22,23], although it is more sensitive to transients and requires a higher sampling frequency. In addition, the similarity index between the transient currents at both ends was calculated using Pearson correlation coefficient and cosine similarity, but it will not work when the IIREGs produce low power due to insufficient light or wind or the current breaker is re-closed with permanent failure.…”

Section: IImentioning

confidence: 99%

Amplitude Based Pilot Protection for Transmission Line

Wagh

2023

IJRASET

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Distance protection and differential protection schemes are the two primary types of protection schemes employed in gearbox line protection today. However, industrial practice has shown that commonly used gap prevention techniques are limited in tripping speed and selectivity. The timing of the samples in each of the two relays located at the gearbox line terminals also affects the differential protection mechanism. On the other hand, pilot safety schemes using only the communication link to exchange local decision-making about fault conditions are not affected. These method include protection of Extra High Voltage (EHV) and Ultra High Voltage (UHV) transmission lines. Synchronization of time. The problem of creating a fast and accurate fault detection system for the safety of EHV/UHV transmission lines, which is crucial in present power systems, is the subject of this master's thesis. The protection method described in this thesis is the foundation for the detection and analysis of waves travelling wave along transmission at fault initiation. This method compares the arrival of the first traveling waves at both ends of the protected line with respect to direction. This will establish whether the fault is located in the safe zone or not. Based on high voltage transmission network safety requirements a suitable phase sequence algorithm is developed to control single phase tripping. Finally, through simulations conducted in the MATLAB environment, practical design concerns for incorporating the newly proposed protection algorithm into a numerical relay unit are investigated.

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Section: IImentioning

confidence: 99%

Amplitude Based Pilot Protection for Transmission Line

Wagh

2023

IJRASET

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“…The algorithm can detect, classify, and locate faults with satisfying results [29]. The combined methodology of DWT and traveling waves has also been used to improve the accuracy of the fault detection and analysis algorithm [30,31].…”

Section: Literature Reviewmentioning

confidence: 99%

Fault Classifications in Distribution Systems Consisting of Wind Power as Distributed Generation Using Discrete Wavelet Transforms

Patcharoen

Ngaopitakkul

2019

Sustainability

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This paper proposed a fault type classification algorithm in a distribution system consisting of multiple distributed generations (DGs). The study also discussed the changing of signal characteristics in the distribution system with DGs during the occurrence of different fault types. Discrete Wavelet Transform (DWT)-based signal processing has been used to construct a classification algorithm and a decision tree to classify fault types. The input data for the algorithm is extracted from the three-phase current signal under normal conditions and during fault occurrence. These signals are recorded from the substation, load, and DG bus. The performance of the proposed classifying algorithm has been tested on a simulation system that was modeled after part of Thailand’s 22 kV distribution system, with a 2-MW wind power generation as the DG, connected to the distribution line by PSCAD software. The parameters that were taken into consideration consisted of the fault type, location of the fault, location of DG(s), and the number of DGs, to evaluate the performance of the proposed algorithm under various conditions. The result of the simulation indicated significant changes in current signal characteristics when installing DGs. In addition, the proposed algorithm has achieved a satisfactory accuracy in terms of identifying and classifying fault types when applied to a distribution system with multiple DGs.

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