Faulty Feeder Detection for Single-Phase-to-Ground Fault in Distribution Networks Based on Transient Energy and Cosine Similarity

Due to the high ground fault resistance and the complexity of power distribution network structure (such as too many nodes, branches and too long lines), adopting common traveling wave method and ac injection method can not effectively locate the single-phase grounding fault in the distribution network system.To solve above problems and determine the position of the point of failure prisely, this paper adopted the dc location method of injecting the dc signal from the point of failure under the power outage offline. This paper introduces the single phase dc method and the method of three phase dc, and the simulation shows that the dc location method is effective and feasible.

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Single-phase-to-ground fault section location in flexible resonant grounding distribution networks using soft open points

International Journal of Electrical Power & Energy Systems ◽

10.1016/j.ijepes.2020.106198 ◽

2020 ◽

Vol 122 ◽

pp. 106198

Author(s):

Zhengtian Li ◽

Yuqing Ye ◽

Xiao Ma ◽

Xiangning Lin ◽

Feng Xu ◽

...

Keyword(s):

Single Phase ◽

Distribution Networks ◽

Ground Fault

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Typical Fault Cause Recognition of Single-Phase-to-Ground Fault for Overhead Lines in Nonsolidly Earthed Distribution Networks

IEEE Transactions on Industry Applications ◽

10.1109/tia.2020.3020526 ◽

2020 ◽

Vol 56 (6) ◽

pp. 6298-6306

Author(s):

Yong-Liang Liang ◽

Ke-Jun Li ◽

Zhao Ma ◽

Wei-Jen Lee

Keyword(s):

Single Phase ◽

Distribution Networks ◽

Overhead Lines ◽

Ground Fault

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Reflected Traveling Wave Based Single-Ended Fault Location in Distribution Networks

Energies ◽

10.3390/en13153917 ◽

2020 ◽

Vol 13 (15) ◽

pp. 3917 ◽

Cited By ~ 1

Author(s):

Yangang Shi ◽

Tao Zheng ◽

Chang Yang

Keyword(s):

Traveling Wave ◽

Power Distribution ◽

Fault Location ◽

Single Phase ◽

Distribution Network ◽

Distribution Networks ◽

Power Distribution Networks ◽

Reflected Waves ◽

Ground Fault ◽

Location Methods

Traveling wave (TW)-based fault-location methods have been used to determine single-phase-to-ground fault distance in power-distribution networks. The previous approaches detected the arrival time of the initial traveling wave via single ended or multi-terminal measurements. Regarding the multi-branch effect, this paper utilized the reflected waves to obtain multiple arriving times through single ended measurement. Potential fault sections were estimated by searching for the possible traveling wave propagation paths in accordance with the structure of the distribution network. This approach used the entire propagation of a traveling wave measured at a single end without any prerequisite of synchronization, which is a must in multi-terminal measurements. The uniqueness of the fault section was guaranteed by several independent single-ended measurements. Traveling waves obtained in a real 10 kV distribution network were used to determine the fault section, and the results demonstrate the significant effectiveness of the proposed method.

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