Transient-based protection technique for future DC grids utilising travelling wave power
Monday Ikhide,Sarath B. Tennakoon,Alison Griffiths,Hengxu Ha,Sankara Subramanian,Andrzej J. Adamczyk +5 more
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TLDR
To improve the protection scheme for long-distance remote internal fault, a second element utilising the concavity of the forward travelling wave power is proposed, which can be easily implemented since it will require fewer hardware resources.Abstract:
This study presents a novel time-domain protection technique for application to DC grids. The technique utilises the power developed by the forward and backward travelling waves produced by a fault to distinguish between internal and external faults. For an internal fault, the calculated travelling wave power must exceed a predetermined setting; otherwise the fault is external. The ratio between the forward travelling wave power and the backward travelling wave power provides a directional comparison. For a forward directional fault, this ratio is less than unity, whereas the ratio is greater than unity for reverse directional faults. To improve the sensitivity of the protection scheme for long-distance remote internal fault, a second element utilising the concavity of the forward travelling wave power is proposed. The proposed technique is time domain based and does not require complex mathematical burden; moreover, as such can be easily implemented since it will require fewer hardware resources. Simulations were carried out in power systems computer-aided design/electromagnetic transient simulations, and the results presented considering wider cases of fault scenarios including 500 Ω remote internal fault shows the suitability of the proposed scheme as all fault scenarios indicated were identified within 500 µs following the application of the fault.read more
Citations
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Journal ArticleDOI
Protection of High-Voltage DC Grids Using Traveling-Wave Frequency Characteristics
TL;DR: A new traveling-wave (TW) based protection scheme to detect and locate faults in HVdc grids, which utilizes only the first locally measured TW after the inception of a fault, and focuses on the frequency content and polarity of the TW, rather than its arrival time.
Journal ArticleDOI
A Survey of Traveling Wave Protection Schemes in Electric Power Systems
Felipe Wilches-Bernal,Ali Bidram,Matthew J. Reno,Javier Hernandez-Alvidrez,Pedro Barba,Benjamin Reimer,Rudy Montoya,Christopher Carr,Olga Lavrova +8 more
TL;DR: In this article, the authors explore the theory of traveling waves and how they can be used to enable fast protection mechanisms and present a literature review of traveling wave-based protection methods at the transmission and distribution levels of the grid and for AC and DC configurations.
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Traveling Waves-Based Method for Fault Estimation in HVDC Transmission System
TL;DR: In this paper, a fault location method based on traveling waves is reviewed for the HVDC transmission system, which is known for its low losses, effective control ability, efficiency and reliability.
Journal ArticleDOI
Fault detection and location in medium-voltage DC microgrids using travelling-wave reflections
TL;DR: A new technique based on fault launched travelling-waves (TWs) to detect, classify, and locate different dc fault types in MVDC microgrids is proposed, which utilises the frequency of TW reflections, rather than their arrival time.
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One-end protection algorithm for offshore wind farm HVDC transmission based on travelling waves and cross-alienation
TL;DR: The simulation results show that the proposed protection scheme is simple, fast, accurate, and not sensitive to fault resistance or load variations, and also its implementation is economically as no need for extra devices or communication links.
References
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Journal ArticleDOI
Fault Detection and Interruption in an Earthed HVDC Grid Using ROCOV and Hybrid DC Breakers
Jeremy Sneath,Athula Rajapakse +1 more
TL;DR: In this article, an earthed bipole HVDC grid was modeled in PSCAD, and using simulation results, the necessity of di/dt limiting inductors to contain the rise of fault currents within the capacity of current hybrid dc breakers was demonstrated.
Journal ArticleDOI
Distance Protection Based on Travelling Waves
P. A. Crossley,P. G. McLaren +1 more
TL;DR: In this paper, a technique for rapid measurement of the distance to a fault using fault-initiated travelling waves is presented. But the measurement uses the time it takes a given surge to travel from the relaying point to the fault and back.
Proceedings ArticleDOI
Feasibility of DC transmission networks
TL;DR: This paper examines the current status of technology and discusses technical options for developing DC transmission grids and some of the ongoing research directions like the use of travelling wave detection for fast protection or deployment of DC/DC converters for isolation of DC faults.
Journal ArticleDOI
Scheme, based on travelling-waves, for the protection of major transmission lines
TL;DR: In this article, the authors present an analytical treatment to indicate how the initial travelling wave propagated from a fault and a later wave resulting from a reflection at the fault position may be identified.
Proceedings ArticleDOI
Fault detection and Interruption in an earthed HVDC grid using ROCOV and hybrid DC breakers
Jeremy Sneath,Athula Rajapakse +1 more
TL;DR: In this paper, an earthed bi-pole HVDC grid was modeled in PSCAD, and using simulation results, the necessity of di/dt limiting inductors to contain the rise of fault currents within the capacity of current hybrid DC breakers was demonstrated.