Selective high resistance grounding system for a cogeneration facility

2016 ◽  
Author(s):  
J.C. Das
Keyword(s):  
High Resistance ◽  
Grounding System

Installation of High Resistance Grounding System on the Ungrounded System at Offshore Platform

2021 ◽  
Author(s):  
Alvin Teo Tuan Lee ◽  
Pungut Ibrahim ◽  
Hoe Tung Yew ◽  
Mazlina Mamat ◽  
Nader Nassif Barsoum
Keyword(s):  
High Resistance ◽  
Offshore Platform ◽  
Grounding System

scholarly journals Diseño de reingeniería del sistema de puesta a tierra de un transformador de 300 KVA

2019 ◽  
pp. 1-7
Author(s):  
Joel Dominguez-De La Cruz ◽  
Guillermo Miguel Martínez-Rodríguez ◽  
Javier Garrido-Melendez ◽  
Jesús Jiménez-Rivera
Keyword(s):  
Engineering Design ◽  
Power Quality ◽  
High Resistance ◽  
System Analysis ◽  
Potential Difference ◽  
Human Being ◽  
Actual System ◽  
Grounding System ◽  
Quality Analyzer ◽  
Grounding Electrode

Re-engineering design of grounding system (GS) is presented of a 300 KVA transformer from the Universidad Veracruzana, as a background measurements were made to transformer with an power quality analyzer, from the measured and analyzed data high values were detected of harmonics in the neutral, we deduce that the problem is in the GS, to verify the above, measurements were made with a grounding electrode tester, obtaining high resistance in the rods of GS, this value fail with respect to norm NOM -001-SEDE-2012, also, the contact and step potentials were simulated with the help of ETAP Software showing a dangerous potential difference for the human being, a methodology is proposed for the design and re-engineering of SG of the transformer through actual system analysis, calculations and simulations using ETAP software, obtaining values that comply with the normative and most importantly that provide security to people and equipment’s.

scholarly journals Simulation and Experiment Analysis of 10 kV Flexible Grounding Device

Information ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 384
Author(s):  
Mengxuan Liu ◽  
Chi Zhang ◽  
Kangli Liu
Keyword(s):  
High Resistance ◽  
Single Phase ◽  
Fault Line ◽  
Grounding System ◽  
Simulation And Experiment ◽  
Small Resistance ◽  
Calculation Module ◽  
Distribution Line ◽  
Current Calculation ◽  
A Current

The traditional 10 kV distribution network grounding system has some disadvantages, such as small grounding current and poor arc extinguishing effect, thus, hindering the detection of high-resistance grounding fault. Therefore, this paper studied the flexible grounding system consisting of small-resistance and active inverter in parallel. The control system comprises the compensation current calculation module, the fault detection module, and line protection strategy. During a single-phase grounding fault, the device is designed to inject a current of a given amplitude and phase into the neutral point to effectively suppress fault-point voltage and current and, meanwhile, quickly identifying the fault line or the busbar fault and then systematically protecting the distribution line. In addition, a large number of simulations have performed based on three grounding faults (metal, low-resistance, and high-resistance) and two modes (ungrounded and small-resistance grounding). The device can all be functional. Finally, a 400 V-level experimental prototype was built, and the experimental results are consistent with the simulation results, which can verify the effectiveness and feasibility of the flexible grounding device.

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