Surabhi Patel’s scientific contributions

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Publications (1)


Computation Of Maximum Earth Current In Substation Switchyards
  • Article

October 1983

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90 Reads

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29 Citations

IEEE Transactions on Power Apparatus and Systems

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Roderick P. Webb

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E.B. Joy

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Surabhi Patel

This paper presents recent developmental advances for the computation of maximum ground potential rise of grounding structures or alternatively maximum earth current in substation grounding systems. An advanced methodology for short circuit analysis is presented. The methodology is based on modeling of power system elements in direct phase quantities. Coupled with equivalency techniques, it provides an extremely efficient algorithm for performing numerous sequential short circuit analyses. An easy to use computer program has been developed under EPRI sponsorship. The computer algorithm uses the methodology to search for the fault condition which yields the maximum earth current in a substation grounding system. The methodology has been validated with actual system measurement on a Georgia Power Company Substation. Validation results are presented. Typical results as well as program utilization factors are discussed. The results demonstrate that the worst fault location is highly dependent on system parameters and cannot be predicted with simple rules.

Citations (1)


... In the past three decades, a number of researchers have investigated several approaches to determine the earth fault current division and distribution which have been reported [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. A number of methods have made some different approximations and simplifications for evaluation of this issue such as considering identical spans of incoming/outgoing overhead lines, uniform tower footing resistances, an overhead ground wire connected to the earth at various towers through the tower footing resistance which is substituted by an infinite ladder network and etc. [2][3][4][5][6][7] and [12] while the other approaches have been reported as analytical methods [1] and [8][9][10][11][12][13][14][15][16][17][18]. ...

Reference:

A Simplified Approach to Calculate the Earth Fault Current Division Factor Passing Through the Substation Grounding System
Computation Of Maximum Earth Current In Substation Switchyards
  • Citing Article
  • October 1983

IEEE Transactions on Power Apparatus and Systems