Analysis of Voltage Characteristics for Single-Phase Line Break Fault in Resonant Grounding Systems

Li, He; Yongduan, Xue; Chen, Mengqi; Zhang, Zhongxia

doi:10.1109/tpwrd.2022.3215542

Cited by 4 publications

(2 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In [25], an analysis was conducted on the voltage characteristics of various types of single-phase line break faults in resonant grounding systems. Considering factors such as fault point location, unbalanced load impedance, and grounding resistance, a detailed mathematical model was established.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Resilience and Reliability of Active Distribution Networks through Accurate Fault Location and Novel Pilot Protection Method

Xu,

Fan,

Zhang

et al. 2023

Energies

View full text Add to dashboard Cite

The integration of distributed generation (DG) into the decentralized access of the distribution network transforms the existing structure into an active distribution network. The alteration in fault characteristics poses significant challenges to the coordinated operation of relay protection. Fault location within the distribution network plays a vital role in facilitating fault recovery and enhancing the resilience of the power system. It proves instrumental in improving the network’s ability to withstand extreme disasters, thereby enhancing the reliability of power distribution. Therefore, this paper provides a detailed analysis of the voltage fault components occurring during various fault types within an active distribution network. Building upon the identified characteristics of voltage fault components, a novel approach for the longitudinal protection of active distribution networks is proposed. This method involves comparing the calculated values of voltage fault components with their actual values. The proposed approach is applicable to various fault scenarios, including short-circuit faults, line break faults, and recurring faults. It exhibits advantages such as insensitivity to the penetration of distributed power supplies and robustness in withstanding transition resistance. The simulation results validate the effectiveness of the proposed method, affirming its applicability to diverse protection requirements within active distribution networks.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhancing Resilience and Reliability of Active Distribution Networks through Accurate Fault Location and Novel Pilot Protection Method

Xu,

Fan,

Zhang

et al. 2023

Energies

View full text Add to dashboard Cite

show abstract

“…In practical distribution networks, pure line break faults often escalate into line break faults with earthing, as the broken conductors fall to the ground. Our previous work [21], [22] studied the voltage change characteristics on both sides of the fault point for different types of single-phase line break faults in ungrounded and resonant grounding systems, respectively. Nevertheless, a comprehensive summary of these characteristics is lacking, and no novel detection method has been proposed in both references.…”

Section: Introductionmentioning

confidence: 99%

Identification of Single-Phase Line Break Fault Direction Based on Local Voltage Information in Small Current Grounding System Considering the Impact of DG

Yang,

Li,

et al. 2023

IEEE Access

Self Cite

View full text Add to dashboard Cite

Line break faults commonly occur in distribution networks and pose the risk of electric shocks to nearby individuals and animals. This study aims to address the challenge of identifying the direction of a line break fault. Specifically, we develop a model for a single-phase line break fault in a small current grounding system and focus on analyzing the steady-state voltage changes on both sides of the fault point. The voltage characteristics of the ungrounded system and the resonant grounding system are compared and summarized. Based on these characteristics, a more reliable method is proposed to identify the single-phase line break fault direction by utilizing two types of local voltage information: the magnitude of the line-to-line voltage and the sequence of phase-to-earth voltage. Additionally, we analyze the effects of V/V wired potential transformer (PT) and distributed generation (DG). The proposed method can accommodate the high utilization rate of V/V wired PT in distribution networks and its practicality is unaffected by the connection of DG to the distribution network. The above analysis is verified through simulations. The findings of this study demonstrate that the direction of a single-phase line break fault can be reliably detected using local voltage information and can be further localized with the assistance of communication, thereby improving the level of relay protection in distribution networks.

show abstract

Research on the Influence Factors and Law Analysis of Electric Energy Information Under Single-Phase Ground Fault of Distribution Network

Yi,

Chen,

Fang

et al. 2024

Lecture Notes in Electrical Engineering

View full text Add to dashboard Cite

Analysis of Voltage Characteristics for Single-Phase Line Break Fault in Resonant Grounding Systems

Cited by 4 publications

References 15 publications

Enhancing Resilience and Reliability of Active Distribution Networks through Accurate Fault Location and Novel Pilot Protection Method

Enhancing Resilience and Reliability of Active Distribution Networks through Accurate Fault Location and Novel Pilot Protection Method

Identification of Single-Phase Line Break Fault Direction Based on Local Voltage Information in Small Current Grounding System Considering the Impact of DG

Research on the Influence Factors and Law Analysis of Electric Energy Information Under Single-Phase Ground Fault of Distribution Network

Contact Info

Product

Resources

About