Traveling-wave-based fault location algorithm for star-connected hybrid multi-terminal HVDC system

苏伟,; Gong, Yanfeng; Li, Yan

doi:10.1109/ei2.2017.8245645

Cited by 11 publications

(3 citation statements)

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“…Considering non-universal fault responses of inverters due to their software-defined and nonstandard structure and control, protective methods independent of the source have been developed. One of the major types of source-independent relays is TW-based relays which are able to detect and locate a wide range of faults in highly complex systems [37] and [38].…”

Section: Source-independent Relaysmentioning

confidence: 99%

Protection and Monitoring of DESO

Hamidi

2022

Preprint

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This chapter first accurately reviews the basics of smart microgrid protection since the definitions vary from a reference to another. Then it focuses on the fault responses of Inverter-Based Resources (IBR’s) as those are emerging technologies that will be playing the great role of interfacing primary energy resources and the grid. In particular, for materialization of net-zero Carbon emission in electricity generation, the use of IBR’s is indispensable. However, the non-universal and software-defined IBR fault responses make conventional relays such as overcurrent, directional, and distance relays inapplicable in heavily IBR-based grids. Therefore, the discrepancy between conventional and IBR fault responses is elaborated and possible solutions to the looming protection issues are discussed. The shortcomings and merits of each solution are also discussed.

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Section: Source-independent Relaysmentioning

confidence: 99%

Protection and Monitoring of DESO

Hamidi

2022

Preprint

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“…According to the theory of multiresolution analysis, wavelet transform of one-dimensional signals can obtain approximate component A and detail component D, where A and D represent the low and high frequency components of the original signal, respectively. This process can be implemented by the Mallat algorithm, and its transformation process can be expressed as (3) and (4).…”

Section: Wavelet Transform When a Single Pole Groundmentioning

confidence: 99%

“…Most of the single pole-to-ground fault location of DC transmission lines is based on traveling wave theory, which is easily affected by external interference, difficult to achieve high sampling rates, and not accurate enough [3,4]. In addition, when the transition resistance is too large, the location method based on the traveling wave theory will hardly detect the line surge, and eventually cause a large location error [5].…”

Section: Introductionmentioning

confidence: 99%

Single Pole‐to‐Ground Fault Location Method for MMC‐HVDC System Using Wavelet Decomposition and DBN

Lan

Si-jie

et al. 2020

IEEJ Transactions Elec Engng

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Non-member Accurate and reliable fault location technology is essential to the stable operation of the modular multilevel converter-high voltage direct current (MMC-HVDC) system. Aiming at the difficulty of locating high-resistance ground faults on MMC-HVDC transmission lines, this paper proposes a method for fault location of transmission lines based on wavelet transform and deep belief network (DBN). First, the wavelet transform is used to decompose the original single pole ground fault voltage waveform, and then the high-frequency and low-frequency components obtained are used as training samples to train different DBN models, the final fault location results are obtained by superimposing the outputs of each model at last. The ±250 kV double-ended MMC-HVDC system model is established by using PSCAD/EMTDC, which can simulate the faults of different positions and different transition resistances. In order to verify the fault location performance of the proposed method, it is compared with two machine learning fault location methods. The results show that this method can accurately and reliably locate the single pole-to-ground fault of the transmission line with transition resistance of up to 10 000 at low sampling frequency of 20 kHz.

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Protection and Monitoring of Digital Energy Systems Operation

Hamidi

Bhadra

2023

Power Systems

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Traveling-wave-based fault location algorithm for star-connected hybrid multi-terminal HVDC system

Cited by 11 publications

References 11 publications

Protection and Monitoring of DESO

Protection and Monitoring of DESO

Single Pole‐to‐Ground Fault Location Method for MMC‐HVDC System Using Wavelet Decomposition and DBN

Protection and Monitoring of Digital Energy Systems Operation

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