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IEEJ Transactions on Electrical and Electronic Engineering
Active distribution networks with low‐resistance grounding face a significant challenge under the dual‐carbon strategy. When a single‐phase arcing high‐resistance grounding fault occurs, the resulting zero‐sequence current is weak and unstable. Consequently, existing protection schemes for such faults are rendered ineffective.
Fengxian Zhao +4 more
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Active distribution networks with low‐resistance grounding face a significant challenge under the dual‐carbon strategy. When a single‐phase arcing high‐resistance grounding fault occurs, the resulting zero‐sequence current is weak and unstable. Consequently, existing protection schemes for such faults are rendered ineffective.
Fengxian Zhao +4 more
openaire +1 more source
High-Resistance Ground Retrofits in Pulp and Paper Mills
IEEE Industry Applications Magazine, 2001The safety and reliability of low-voltage, high-resistance grounding (HRG) schemes have made them an excellent choice for applications in the pulp, paper and other process industries. As facilities shift toward this technology for reliability in low-voltage substations, retrofitting existing grounded systems becomes the focus of several critical ...
Robert Beltz +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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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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Conversion of Ungrounded Systems to High-Resistance Grounding Systems
2006 IEEE Industrial and Commercial Power Systems Technical Conference - Conference Record, 2006An innovative method is proposed where charging current can be measured and grounding resistors sized without staging a fault. Overvoltages have caused damage to equipment and voltage transformer fuse blowing an ungrounded 4.8 kV delta distribution system.
P.E. Sutherland, A. Mansoor
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Fault locating in ungrounded and high-resistance grounded systems
IEEE Transactions on Industry Applications, 2001One of the most common and difficult problems to solve in industrial power systems is the location and elimination of the ground fault. Ground faults that occur in ungrounded and high-resistance grounded systems do not draw enough current to trigger circuit breaker or fuse operation, making them difficult to localize. Techniques currently used to track
T. Baldwin +3 more
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Phase-Ground Fault Current Analysis and Protection of a High-Resistance Grounded Power System
2019 IEEE Industry Applications Society Annual Meeting, 2019This article provides a closer look at a high resistance grounded (HRG) power system using symmetrical components. It addresses the industry confusion, “how system charging current direction reverses during phase-ground fault condition without reversal of system voltage that causes fault current flow.” It presents fault current phasor diagram that ...
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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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High-Resistance Grounding in the Cement Industry-A User's Experience
IEEE Transactions on Industry Applications, 1986The use of properly applied high-resistance grounding, with a method of tracing and locating the first fault, offers many advantages to the electrical power system including suppression of transient overvoltages, continued operation on the first ground fault, fast tracing of the first ground fault, and minimizing flash hazard. These benefits along with
John W. Foster +2 more
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