A novel single phase grounding fault protection scheme without threshold setting for neutral ineffectively earthed power systems

Zeng, Xiangjun; Yu, Kun; Wang, Yuanyuan; Yang, Xu

doi:10.17775/cseejpes.2016.00038

Cited by 43 publications

(25 citation statements)

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“…The fuzzy logic: By Liu and Huang (2018), fuzzy cmeans clustering is presented to the APFM for detection the fault feeder by classifying the faulty feeder and sound feeders into two categories without a certain threshold setting. By Zeng et al (2016), a new SLGF protection method without threshold setting is presented. The fault detection is achieved based on operating states rather than setting values.…”

Section: Heuristic Methodsmentioning

confidence: 99%

Methods in Single Phase to Ground Faults on Power Distribution Systems

Soomro¹,

Tawafan²,

Jabbar³

2019

J. Eng. Appl. Sci.

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This study highlights the main contributions for the single phase to ground faults on distribution networks field throughout a last three decades from classic methods to heuristic methods. The surveys about 76 papers that are published in the field, the quantity of existing methods for each method is determined and categorized. The study includes graphs and tables explaining the frequency of each single phase to ground faults methods and so that, researchers in the same field can be used this paper as a guideline for their research.

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Section: Heuristic Methodsmentioning

confidence: 99%

Methods in Single Phase to Ground Faults on Power Distribution Systems

Soomro¹,

Tawafan²,

Jabbar³

2019

J. Eng. Appl. Sci.

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“…In [8], the improved empirical wavelet transform was used to extract the natural mode function of original signal, and then the fault probability of each feeder was estimated. In [9], the fuzzy c-means algorithm was used to determine the fault and non-fault states of feeders, and then the faulty feeder was detected by the distance between fault state feature samples and cluster centers. In [10], a method based on the continuous wavelet transform and convolution neural network was proposed to detect faulty feeders.…”

Section: Post-fault Bus Voltages ∆ / /mentioning

confidence: 99%

“…1) Under high impedance faults, the ZSC is quite small and difficult to extract, which leads to the failure on some ZSC-based methods such as [2] and [3]. 2) Some smart methods, such as [8] and [9], focus on the signal transformation and processing, and their algorithms are complex and difficult to implement in engineering. 3) Some methods, such as [17] and [18], can only detect faulty feeders, but cannot further locate faults.…”

Section: Post-fault Bus Voltages ∆ / /mentioning

confidence: 99%

Single-Line-to-Ground Fault Location in Resonant Grounded Systems Based on Fault Distortions

Chen

Yin

et al. 2021

IEEE Access

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Under single-line-to-ground (SLG) faults, the voltages and currents in resonant grounded systems will inevitably be distorted. To locate the faults quickly and accurately, this paper proposes a location method based on fault distortions. The faulty phase is firstly detected according to the first SLG fault feature below, and then the faulty feeder and section are detected according to the second feature below. 1) On the bus, one of the following distortions occurs. One dropped faulty-phase voltage (FPV) and two raised normalphase voltages (NPVs). One dropped FPV and two NPVs (in which one rises and the other drops), where the product of FPV amplitude distortion and its phase-angle distortion is unique among three phase voltages. 2) On the faulty phase, the current on faulty feeder upstream rises, while the currents on faulty feeder downstream and normal feeders drop. Compared to existing methods, simulation tests show that the proposed method is robust under high impedance faults, and has a simple algorithm and easy engineering implementation. Also, it is effective under harmonics, three-phase imbalance, and different fault positions. INDEX TERMSFault distortions, fault location, single-line-to-ground faults, resonant grounded systems ACRONYMS SLG Single line to ground (F/N) PV (Faulty/Normal) phase voltage RGS Resonant grounded system ZSC Zero-sequence current FF (U/D) Faulty feeder (upstream/downstream) FPC Faulty phase current VFA Voltage fault area:

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“…The detailed mathematical models of three stage generators can be seen in Appendix A. If the generator's speed is constant and treated as a parameter of the system, Equations (1)- (5) which are linear differential equations can be rewritten for small perturbations by simply adding ∆ to all currents and voltages [16][17][18][19].…”

Section: Three Stage Generator Transfer Functionmentioning

confidence: 99%

Digital Generator Control Unit Design for a Variable Frequency Synchronous Generator in MEA

Yang²,

Zhang

2018

Energies

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Variable frequency power generation systems have been adopted for modern aircraft power systems, thus, a new generator control unit (GCU) must be designed to regulate the output voltage and obtain high quality power supply under a wide frequency range from 360 Hz to 800 Hz. In this paper, a dual digital signal processor (DSP) structure-based GCU was proposed. Multi-loop control structure was adopted with the controller parameters varying adaptively at different working conditions to obtain better performance. Different root-mean-square (RMS) calculation algorithms have been compared and the final RMS calculation scheme was determined to realize the trade-off between accuracy and computing efficiency. Experimental results show considerable performance improvements of the generator output voltage under various operating conditions with the proposed GCU.

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A novel single phase grounding fault protection scheme without threshold setting for neutral ineffectively earthed power systems

Cited by 43 publications

References 0 publications

Methods in Single Phase to Ground Faults on Power Distribution Systems

Methods in Single Phase to Ground Faults on Power Distribution Systems

Single-Line-to-Ground Fault Location in Resonant Grounded Systems Based on Fault Distortions

Digital Generator Control Unit Design for a Variable Frequency Synchronous Generator in MEA

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