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Applying High-Resistance Neutral Grounding in Medium-Voltage Systems
IEEE Transactions on Industry Applications, 2010The application of high-resistance neutral grounding (HRNG) to medium-voltage (MV) distribution systems is one of the least understood and often misapplied methods of system neutral grounding. An HRNG grounded system is the only intentionally grounded neutral grounding method suitable for industrial systems that allows normal operation (no voltage dips,
L J Kingrey, R Painter, A S Locker
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High-Resistance Grounded Power Systems--Why Not?
IEEE Transactions on Industry Applications, 1976Many systems could be high-resistance grounded--with the traceable signal to locate the first ground fault--to result in a safe, economical, reliable, and uncomplicated method of grounding of 480-.
Walter C. Bloomquist +2 more
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High Resistance Grounding Analysis Using Symmetrical Components
2019 IEEE PES/IAS PowerAfrica, 2019This paper provides a perspective on high resistance grounding (HRG) using symmetrical components. The paper notes that with the use of modern micro-processor-based relaying and zero-sequence current transformers, directional ground relays can sense the zero-sequence capacitive ground fault current on an HRG or ungrounded system. It further presents an
John P Nelson, Sergio Panetta
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IEEE Transactions on Power Delivery, 1999
Decreasing the ground resistance of a grounding system in high resistivity soil is often a formidable task. A new method is proposed to decrease ground resistances. This method requires three steps: (1) drilling deep holes in the ground; (2) developing cracks in the soil by means of explosions in the holes; and (3) filling the holes with low ...
null Qingbo Meng +3 more
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Decreasing the ground resistance of a grounding system in high resistivity soil is often a formidable task. A new method is proposed to decrease ground resistances. This method requires three steps: (1) drilling deep holes in the ground; (2) developing cracks in the soil by means of explosions in the holes; and (3) filling the holes with low ...
null Qingbo Meng +3 more
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Residual Magnetic Flux in High Resistance Grounding System
2019 5th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST), 2019When transformer is being energized a large magnetizing inrush current flows depending upon the closing phase of circuit breakers and the residual magnetic flux in the iron core. One of the suppressing the magnetizing inrush current method is to control closing phase of the circuit breaker.
Yukihiko Himata +2 more
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High-Resistance Grounded Power System
IEEE Transactions on Industry Applications, 2015To minimize ground fault during a line-to-ground fault condition, it has been a common practice to use high-resistance grounded (HRG) power systems, both at low voltage and at medium voltage (MV). The criteria for designing HRG systems are very well known to the industry; however, the opinion of industry experts has been divided on limiting the use of ...
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Pullout Resistance of High-Voltage Strengthened Ground Anchors
Journal of Geotechnical and Geoenvironmental Engineering, 1998Pullout resistance of ground anchor models embedded in a marine sediment was tested after high-voltage treatment through electrically insulated electrode poles inserted in the soil. The effects of the applied voltage, insulation thickness, and electrode arrangement are evaluated through an experimental program.
Julie Q. Shang, Wayne A. Dunlap
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Measurements of grounding resistances for high impulse currents
IEE Proceedings - Generation, Transmission and Distribution, 1998The paper presents field measurements of surge characteristics of a concrete pole, a buried single conductor and a grounding net for high-impulse currents with a maximum magnitude of 40 kA and with a wavefront duration of a few microseconds. The measured results show that the grounding resistances are greatly dependent on the applied currents and have ...
S. Sekioka +3 more
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Practical evaluation of ground enhancing compounds for high soil resistivities
2010 30th International Conference on Lightning Protection (ICLP), 2010In order to study the long-term effect of using “ground enhancing compounds” in conjunction with various ground electrodes, a common project between Electrical Research Institute (IIE) and the Mexican Electrical Utility (CFE), was started in 2007. The aim of the project is to characterize the ground enhancing compounds in order to obtain the relative ...
Galvan, Arturo +2 more
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Improved Electrical Safety Through High Resistance Grounding
IEEE Transactions on Industry Applications, 2015High resistance grounding (HRG) is a well-proven technology for improving electric reliability for many industrial and utility facilities such as used in petrochemical, automotive, and generating plants. Many such facilities require the increased reliability for production and operational reasons.
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