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The IEEE Standard 1246-2011 Guide provides a method to predict worker touch voltage at grounded worksites in high-voltage alternating current substations using impedance correction K-factors for temporary protective grounds (TPGs). This is the second of two papers that provide supportive information for the grounding models and derivations of TPG impedance equations presented in that Guide.
This paper focus on earth potential maldistribution when substation is stroke by lightning. ATPDraw is used to analyze lightning transient effect of earthing network. First set up unit model of earthing body based on general mathematical model of single earthing body. Then establish simulation model of practical earthing network followed a 220 kV substation lightning transient effect is simulated...
Modeling the equivalent source impedance of utility substations, which supply customer facilities, is crucial in order to calculate the fault current levels at the service entrance, and, accordingly, properly rate all of the equipment, which may be involved in a fault, both three- phase and single-phase-to-ground. Electrical designers should receive, therefore, reliable data from the electric utility...
A parallel moment method is developed for the computation of large grounding grids in multi-layer soil. All of the time-consuming steps in this method are designed supporting parallel computing on a PC Cluster using message passing interface (MPI). Compared with the experimental results, this method is proved correct and because of the good speedup, it is practical for the analysis of large grounding...
Along with the development of Chinapsilas power system: the increased demand for electricity. The increased plant capacity, the continuously improved voltage, more and more networks, substation needs growing demand for power transmission capacity. Therefore, grounding information management is getting more important. In order to ensure the safety of operation, a system of grounding status in substation...
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