Sealed model and computation of hazardous waste landfill high voltage DC leakage detection  

作　　者：杨萍 Tian Jinwen Wang Yanni Xue Lin 

机构地区：[1]School of Information,Beijing Union University

出　　处：《High Technology Letters》2015年第4期457-464,共8页高技术通讯（英文版）

基　　金：Supported by the National Basic Research Development Program of China(No.2010CB428506);the National High Technology Research and Development Program(No.2007AA061303);Beijing Higher Education Young Elite Teacher Project(YETP1756)

摘　　要：According to the structural characteristics of hazardous waste landfill and the leakage current model of high voltage DC Landfill leakage detection, a sealed model is established detail. The detection layer of the hazardous waste landfill is considered as a sealed assumed that the source current flows through the leak entirely. The leak is regard and analyzed in space and it is ed as a positive current resource ＋ I located at the current entrance or a negative resource - I located at the current exit, which depends on the placement of the current supply. The electrical potential of an arbitrary in detection layer satisfies Poisson equation. The boundary condition is regarded as a natural bound- ary condition for the high resistivity of high density polyethylene （HDPE） membrane. Based on which a numerical calculation method is developed. Satisfactory agreement between experimental da- ta and simulated data validates the analysis. Parametric studies show that a larger horizontal distance between the power supply electrode and leak and a smaller distance between the detector electrodes and the detected liner are helpful to leak location. More parametric curves show that parameters leaks can be detected effectively with optimum selection of field survey.According to the structural characteristics of hazardous waste landfill and the leakage current model of high voltage DC Landfill leakage detection,a sealed model is established and analyzed in detail.The detection layer of the hazardous waste landfill is considered as a sealed space and it is assumed that the source current flows through the leak entirely.The leak is regarded as a positive current resource +I located at the current entrance or a negative resource-I located at the current exit,which depends on the placement of the current supply.The electrical potential of an arbitrary in detection layer satisfies Poisson equation.The boundary condition is regarded as a natural boundary condition for the high resistivity of high density polyethylene(HDPE) membrane.Based on which a numerical calculation method is developed.Satisfactory agreement between experimental data and simulated data validates the analysis.Parametric studies show that a larger horizontal distance between the power supply electrode and leak and a smaller distance between the detector electrodes and the detected liner are helpful to leak location.More parametric curves show that parameters leaks can be detected effectively with optimum selection of field survey.

关 键 词：hazardous waste landfill high voltage DC method sealed space model 

分 类 号：TM934.31[电气工程—电力电子与电力传动]