An ultra-fast directional protection scheme for DC microgrids based on high-order synchrosqueezing transform

Poursaeed, Amir Hossein; Namdari, Farhad

doi:10.1016/j.seta.2023.103407

Sustainable Energy Technologies and Assessments

2023

DOI: 10.1016/j.seta.2023.103407

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An ultra-fast directional protection scheme for DC microgrids based on high-order synchrosqueezing transform

Amir Hossein Poursaeed

Farhad Namdari

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2024

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High‐speed algorithm for fault detection and location in DC microgrids based on a novel time–frequency analysis

Poursaeed,

Namdari

2024

IET Generation Trans & Dist

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Protecting DC microgrids (DCMGs) from faults is critical due to the rapid current changes that occur in milliseconds. However, ensuring fast and accurate protection in DCMGs is more challenging than in AC systems. This study proposes a novel protection algorithm using traveling waves (TWs) for fault detection and localization. The high‐order synchrosqueezing transform (FSSTH) is applied to precisely identify TWs at the relay location. FSSTH offers a sharp time–frequency representation, enhancing the accuracy and speed of fault detection. This method can accurately detect transient phenomena like TWs in DCMGs, even with noise and variable fault resistance. By using the spectral envelope with FSSTH, ridges in time–frequency representations are extracted, improving fault diagnosis. The approach differentiates external from internal faults and recognizes fault direction by assessing TW polarity. Testing on two different DCMGs showed this algorithm's high efficiency and accuracy, with fault location errors ranging from 1 to 50 meters in low‐voltage and 13 to 64 meters in medium‐voltage DCMGs, even under challenging conditions like high resistance (up to 500 Ω) and low signal‐to‐noise ratio (5 dB). These results demonstrate the method's superior accuracy and robustness compared to existing techniques.

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High‐speed algorithm for fault detection and location in DC microgrids based on a novel time–frequency analysis

Poursaeed,

Namdari

2024

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

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An ultra-fast directional protection scheme for DC microgrids based on high-order synchrosqueezing transform

Cited by 1 publication

References 25 publications

High‐speed algorithm for fault detection and location in DC microgrids based on a novel time–frequency analysis

High‐speed algorithm for fault detection and location in DC microgrids based on a novel time–frequency analysis

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