On Human Life Risk-Assessment and Sensitive Ground Fault Protection in MV Distribution Networks

de, José L Pinto; Louro, Miguel

doi:10.1109/tpwrd.2010.2053564

Cited by 18 publications

(5 citation statements)

References 14 publications

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“…To determine the contact resistance (De Sa & Louro, 2010) of a fallen conductor on desert soil, as shown in Figure 19, site-measured desert soil resistivity values using 4-point Wenner method as in 16.…”

Section: Computation Of Fallen Conductor Contact Resistance and Its Relation To Hifmentioning

confidence: 99%

Sensitivity analysis of a single phase to ground fault system in connection with high impedance faults: A case study

Velmurugan

Chattopadhayay

2020

Cogent Engineering

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Most of High-impedance faults (HIFs) occur due to broken conductors falling on high-resistivity desert soil in United Arab Emirates remain undetected due to incredibly low fault currents and endanger lives. A reliable detection method is needed. A live line test conducted on a 11kV distribution line by switching to a remotely laid conductor did not result enough detectable fault currents. This motivated conducting a literature survey and researching for the reasons why the modern numerical protection relays could not detect such low current faults. Hence, a sensitivity analysis of a single-phase-to-ground system is carried out. Mathematical modelling for the sensitivity analysis is performed using differential calculus. Applying definition of sensitivity to a set of power system equations to analyze to provide guidance for detection of high impedance faults is entirely a new approach. This paper provides a comprehensive analysis of single phase to ground fault system by exhibiting profiles of fault currents, line, neutral, and MV bus voltages for a range of fault impedance. The sensitivity analysis results conclude that low-fault current signals should be collected from the neutral line of the distribution system instead of focusing on the line voltage, current, power and other parameters. Perumal Velmurugan ABOUT THE AUTHOR Mr. Perumal Velmurugan born in Tamil Nadu State, India in 1962. He received BE degree in Electrical and Electronics Engineering from College of Engineering, Guindy in 1984 and ME degree in Power System Studies from Annamalai University, Tamil Nadu in 1990. He is currently a Research Scholar in BITS-Pilani, Dubai Campus in the area of Detection of High Impedance Fault (DoHIF). Author possesses an extensive experience of over 33 years in Power Generation, Transmission and distribution including Power System Analysis using various softwares. He worked as Lead Protection Engineer in a rare kind of project in UAE: Live line to ground fault short circuit tests on 11kV OHL and Experimental Earthing System in desert areas. He represented as a Chairman at technical workshops. He is a member of IEEE, Society of Engineers UAE. He is current working as Engineering Manager in TWINVEY Electric Consultancy, Dubai.

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Section: Computation Of Fallen Conductor Contact Resistance and Its Relation To Hifmentioning

confidence: 99%

Sensitivity analysis of a single phase to ground fault system in connection with high impedance faults: A case study

Velmurugan

Chattopadhayay

2020

Cogent Engineering

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“…in MV distribution network with isolated neutral, sometimes may evolving into cross-phase faults [12]. Therefore, the SPG fault current and fault potential should be limited to a safe range, avoiding energy loss from fault in form of thermal energy and serious life-threatening electrocution [13]. Moreover, this helps to extinguish the fault arc and has a high probability of restoring the distribution network on its own, or provides engineers with safe conditions to clear faulty elements from the SPG fault M. F. Guo and Z. Y. Zheng are with the College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China.…”

Section: Introductionmentioning

confidence: 99%

Fault Current Limitation With Energy Recovery Based on Power Electronics in Hybrid AC–DC Active Distribution Networks

Zhang

Guo

Zheng

et al. 2023

IEEE Trans. Power Electron.

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The active distribution networks are becoming increasingly complicated hybrid AC-DC systems constructed by massive power electronics, the magnitude and direction of power flow may change randomly at any time, making the usual protection potentially insensitive, increasing the negative impacts of single-phase-to-ground (SPG) fault which accounts for the majority of all faults that occurred in medium-voltage (MV) distribution networks in the past. The zero-sequence current in the impedance branch induced between the lines and ground will pass through the SPG fault branch as fault current. This study transfers the zero-sequence current from the SPG fault branch to the power electronic branch connected between the faulty phase and ground involved in the construction of hybrid AC-DC system, thereby limiting SPG fault branch current and reducing fault node potential. This helps to extinguish fault arc and provides engineers with safe conditions to clear faulty elements from the SPG fault branch. The power electronic bears the same fault current and fault phase voltage as SPG fault and will therefore absorb energy in the same way as SPG fault, the energy is recovered and routed back to the hybrid AC-DC system via interconnected power electronics for reuse. The proposed is verified by simulation and experiment.

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“…Nonlinear science has laid a solid theoretical foundation for the safety, reliability, and stability of power systems [2][3][4]. By studying the nonlinear differential equations that appear in the ferromagnetic resonance overvoltage phenomenon, the safe operation of power grids at all levels can be effectively protected [5].…”

Section: Introductionmentioning

confidence: 99%

Further Results about Seeking for the Exact Solutions of the Nonlinear $(2 + 1)$ -Dimensional Jaulent-Miodek Equation

2021

Advances in Mathematical Physics

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Nonlinear science is a great revolution of modern natural science. As a result of its rise, the various branches of subjects characterized by nonlinearity have been developed vigorously. In particular, more attention to acquiring the exact solutions of a wide variety of nonlinear equations has been paid by people. In this paper, three methods for solving the exact solutions of the nonlinear 2 + 1 -dimensional Jaulent-Miodek equation are introduced in detail. First of all, the exact solutions of this nonlinear equation are obtained by using the exp − ϕ z -expansion method, tanh method, and sine-cosine method. Secondly, the relevant results are verified and simulated by using Maple software. Finally, the advantages and disadvantages of the above three methods listed in the paper are analyzed, and the conclusion was drawn by us. These methods are straightforward and concise in very easier ways.

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On Human Life Risk-Assessment and Sensitive Ground Fault Protection in MV Distribution Networks

Cited by 18 publications

References 14 publications

Sensitivity analysis of a single phase to ground fault system in connection with high impedance faults: A case study

Sensitivity analysis of a single phase to ground fault system in connection with high impedance faults: A case study

Fault Current Limitation With Energy Recovery Based on Power Electronics in Hybrid AC–DC Active Distribution Networks

Further Results about Seeking for the Exact Solutions of the Nonlinear $(2 + 1)$ -Dimensional Jaulent-Miodek Equation

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On Human Life Risk-Assessment and Sensitive Ground Fault Protection in MV Distribution Networks

Cited by 18 publications

References 14 publications

Sensitivity analysis of a single phase to ground fault system in connection with high impedance faults: A case study

Sensitivity analysis of a single phase to ground fault system in connection with high impedance faults: A case study

Fault Current Limitation With Energy Recovery Based on Power Electronics in Hybrid AC–DC Active Distribution Networks

Further Results about Seeking for the Exact Solutions of the Nonlinear 2 + 1 -Dimensional Jaulent-Miodek Equation

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Product

Resources

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Further Results about Seeking for the Exact Solutions of the Nonlinear $(2 + 1)$ -Dimensional Jaulent-Miodek Equation