Study on the Influence of Shielding Net Partial-Grounding on Internal Voltage of Substation Building

doi:10.11930/j.issn.1004-9649.2014.7.77.3

Abstract

Abstract: The outer wall surface of a smart substation ,in wich there are a lot of with electric power secondary equipments, needs to be covered with a grounded shielding net which can suppress induced voltage in the building. The shielding net is made up by several rectangular wire-nettings of one meter wide and several meters long,which are that connected with each other and grounded. However, because of geographical, the incomplete connection may exist between the wire-netting and the ground in actual construction. In order to study their impacst on induced voltage in the building in the situation of incomplete connection, the method of finite element analysis is used to build the model, and finally conduct the following conclusions. In case that one piece of the top shielding net is ungrounded , the average induced voltage of each observation points is 62.4 V, and If one side is unground, the average induced voltage of each observation points is 10.8 V; While a total of two pieces of shielding nets are unground on the top or the side of the building, two adjacent ungrounded shielding net on the top would take a largest efface on the induced voltage, the average induced voltage reaches 182.4 V; two non -adjacent shielding nets ungrounded on the side of the building would have a minimal influence on the voltage, the average induced voltage is 19.4 V. The above conclusions can provide the theoretical guide for solving relevant problems in the actual construction.

Key words: shielding net, induced voltage, finite element analysis, electric power secondary equipment, over voltage, grounded wire netting

CLC Number:

TM86

AN Shuai, DAN Shu-heng, CAI Li-chuan. Study on the Influence of Shielding Net Partial-Grounding on Internal Voltage of Substation Building[J]. Electric Power, 2014, 47(7): 77-80.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2014.7.77.3

https://www.electricpower.com.cn/EN/Y2014/V47/I7/77

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