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Study of the electric field distribution inside high voltage substations

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5 Author(s)
C. Munteanu ; Department of Electrotechnics, Technical University of Cluj-Napoca, Romania ; V. Topa ; A. Racasan ; I. T. Pop
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This paper outlines the most recent developments regarding the electric field distribution analysis inside very high voltage substations. The study was performed in order to develop and validate a powerful computation tool able to determine and predict the substation zones where the occupational exposure limits exceeds the admissible values imposed by the legislation. The study cases proposed in the paper are taken from the Romanian national power grid but the conclusions and the mitigation ideas outlined can be directly extended to substations belonging to other national power grids. In the first part of the paper the principles and methods proposed by the authors for the electric field computation in the vicinity of the power devices composing a high voltage substation are outlined. The validation of the computation module implemented was done by comparisons with detailed experimental measurements results performed inside a new rehabilitated 400 kV substation. The evaluation of the results outlines a good agreement between the computed and measured electric field values inside the analyzed substation. This fact motivates the usage of the computation module developed in the design of the future high voltage substations in the light of fulfilling the actual regulations regarding the human exposure to power electric and magnetic fields. In the second part of the paper scenarios to reduce the field values inside the future designed or rehabilitated substations are proposed and examined. The field distributions together with comparison between the field values before and after the implementation of the field mitigation techniques proposed are presented and discussed. The final conclusions ends the paper.

Published in:

10th International Symposium on Electromagnetic Compatibility

Date of Conference:

26-30 Sept. 2011