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A Similarity Comparison Based Pilot Protection Scheme for VSC-HVDC Grids Considering Fault Current Limiting Strategy [PDF]
Journal of Modern Power Systems and Clean Energy, 2023 In the voltage source converter based high-voltage direct current (VSC-HVDC) grids, fast and reliable protections are the key technologies. The traditional protection schemes are easily affected by fault resistance, line distributed capacitance, etc ...
Keao Chen +5 more
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Fault Characteristic Analysis and a Novel Pilot Protection Scheme for Pole-to-Ground Fault in Flexible DC Distribution Network [PDF]
IEEE Access, 2023 Due to the pseudo-bipolar structure of the flexible DC distribution network, the short-circuit current caused by a pole-to-ground fault is weak. The fault characteristics, particularly the steady-state fault characteristics, are not prominent. Therefore,
Hao Qi +6 more
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Amplitude Based Pilot Protection for Transmission Line
International Journal for Research in Applied Science and Engineering Technology, 2023 Abstract: 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
Amruta Narendra Wagh
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Frequency Domain Impedance Based Protection for Flexible DC Distribution Grid
IEEE Access, 2022 The flexible DC distribution grid is suitable for distributed energy resource integration and DC load power supply. However, the fast-increasing fault current has a great impact on the system when a short circuit fault occurs.
Xiuyan Wei +3 more
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Zhongguo dianli, 2023 There are power electronic converters on both sides of the AC submarine line of flexible low-frequency transmission system, and the fault current characteristics are determined by the converter control strategy, which is different from the traditional ...
Weixuan HE +3 more
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IET Generation, Transmission & Distribution, 2023 The unnecessary prolonged operating time of conventional current differential protection under high‐impedance DC line faults is an important issue affecting the continuity of power supply.
Ali Khaleghi‐Abbasabadi +3 more
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New pilot protection method based on the current fault component waveform similarity
IET Generation, Transmission & Distribution, 2023 In order to improve the ability of the modular multi‐level converter to quickly clear and isolate faults in the multi‐terminal flexible DC grid, this paper analyzes the characteristics of current faults in the multi‐terminal flexible direct current grid,
Shuping Gao +3 more
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Energies, 2023 The integration of distributed generation (DG) into the decentralized access of the distribution network transforms the existing structure into an active distribution network.
Lin Xu +5 more
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A Pilot Protection Scheme of DC Lines for MMC-HVDC Grid Using Random Matrix
Journal of Modern Power Systems and Clean Energy, 2023 The over-current capacity of half-bridge modular multi-level converter (MMC) is quite weak, which requests protections to detect faults accurately and reliably in several milliseconds after DC faults.
Senlin Yu, Xiaoru Wang, Chao Pang
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Pilot protection of flexible DC line based on Jaccard similarity integration criterion
电力工程技术, 2023 The flexible DC line protection based on the double-ended method with large communication and long action time is greatly affected by factors such as noise, which makes it difficult to set.
LI Zhenxing +5 more
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