GAO Jinge, LI Jingxiao. Study on Lightning Induced Voltages in Transmission Lines Under Soil Conductivity Stratified Structures[J]. Applied Mathematics and Mechanics, 2019, 40(8): 917-925. doi: 10.21656/1000-0887.390093
Citation: GAO Jinge, LI Jingxiao. Study on Lightning Induced Voltages in Transmission Lines Under Soil Conductivity Stratified Structures[J]. Applied Mathematics and Mechanics, 2019, 40(8): 917-925. doi: 10.21656/1000-0887.390093

Study on Lightning Induced Voltages in Transmission Lines Under Soil Conductivity Stratified Structures

doi: 10.21656/1000-0887.390093
  • Received Date: 2018-03-27
  • Rev Recd Date: 2018-12-18
  • Publish Date: 2019-08-01
  • To solve the contradiction between the ideal hypothesis and the real situation in solution of the lightning induced voltage model, the Rusck model was improved through replacement of the actual line height with the equivalent line height. This method enables fast solution of lightning induced voltages in transmission lines under soil conductivity stratified structures. The effectiveness and superiority of the improved Rusck model were verified through comparison with the FDTD results. The simulation results show that, for a single soil layer with a conductivity less than 0.1 S/m, the influence of the conductivity should be considered in solution of the induced voltage, and the peak voltage will increase with the decrease of the conductivity. For a stratified structure, the induced voltage will increase with the thickening of the upper soil layer with a less conductivity; on the contrary, the induced voltage will decrease with the thickening of the upper layer, and the effects of soil stratification can be ignored for the case of an upper soil layer with a thickness exceeding 5 m.
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